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671 | werner | 2 | /******************************************************************************************** |
3 | ** iLand - an individual based forest landscape and disturbance model |
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4 | ** http://iland.boku.ac.at |
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5 | ** Copyright (C) 2009- Werner Rammer, Rupert Seidl |
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6 | ** |
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7 | ** This program is free software: you can redistribute it and/or modify |
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8 | ** it under the terms of the GNU General Public License as published by |
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9 | ** the Free Software Foundation, either version 3 of the License, or |
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10 | ** (at your option) any later version. |
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11 | ** |
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12 | ** This program is distributed in the hope that it will be useful, |
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13 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | ** GNU General Public License for more details. |
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16 | ** |
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17 | ** You should have received a copy of the GNU General Public License |
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18 | ** along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 | ********************************************************************************************/ |
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20 | |||
534 | werner | 21 | /** @class ResourceUnit |
22 | ResourceUnit is the spatial unit that encapsulates a forest stand and links to several environmental components |
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23 | (Climate, Soil, Water, ...). |
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697 | werner | 24 | @ingroup core |
25 | A resource unit has a size of (currently) 100x100m. Many processes in iLand operate on the level of a ResourceUnit. |
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26 | Each resource unit has the same Climate and other properties (e.g. available nitrogen). |
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27 | Proceses on this level are, inter alia, NPP Production (see Production3PG), water calculations (WaterCycle), the modeling |
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28 | of dead trees (Snag) and soil processes (Soil). |
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534 | werner | 29 | |
30 | */ |
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31 | #include <QtCore> |
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32 | #include "global.h" |
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33 | |||
34 | #include "resourceunit.h" |
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35 | #include "resourceunitspecies.h" |
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36 | #include "speciesset.h" |
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37 | #include "species.h" |
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38 | #include "production3pg.h" |
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39 | #include "model.h" |
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40 | #include "climate.h" |
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41 | #include "watercycle.h" |
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42 | #include "snag.h" |
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43 | #include "soil.h" |
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44 | #include "helper.h" |
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45 | |||
46 | ResourceUnit::~ResourceUnit() |
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47 | { |
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48 | if (mWater) |
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49 | delete mWater; |
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50 | mWater = 0; |
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51 | if (mSnag) |
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52 | delete mSnag; |
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53 | if (mSoil) |
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54 | delete mSoil; |
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55 | |||
738 | werner | 56 | qDeleteAll(mRUSpecies); |
57 | |||
534 | werner | 58 | mSnag = 0; |
59 | mSoil = 0; |
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60 | } |
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61 | |||
62 | ResourceUnit::ResourceUnit(const int index) |
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63 | { |
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64 | qDeleteAll(mRUSpecies); |
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65 | mSpeciesSet = 0; |
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66 | mClimate = 0; |
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67 | mPixelCount=0; |
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68 | mStockedArea = 0; |
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69 | mStockedPixelCount = 0; |
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70 | mIndex = index; |
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71 | mSaplingHeightMap = 0; |
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72 | mEffectiveArea_perWLA = 0.; |
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73 | mWater = new WaterCycle(); |
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74 | mSnag = 0; |
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75 | mSoil = 0; |
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569 | werner | 76 | mID = 0; |
534 | werner | 77 | } |
78 | |||
79 | void ResourceUnit::setup() |
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80 | { |
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81 | mWater->setup(this); |
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82 | |||
83 | if (mSnag) |
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84 | delete mSnag; |
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85 | mSnag=0; |
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86 | if (mSoil) |
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87 | delete mSoil; |
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88 | mSoil=0; |
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89 | if (Model::settings().carbonCycleEnabled) { |
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591 | werner | 90 | mSoil = new Soil(this); |
534 | werner | 91 | mSnag = new Snag; |
92 | mSnag->setup(this); |
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93 | const XmlHelper &xml=GlobalSettings::instance()->settings(); |
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94 | |||
95 | // setup contents of the soil of the RU; use values for C and N (kg/ha) |
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96 | mSoil->setInitialState(CNPool(xml.valueDouble("model.site.youngLabileC", -1), |
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97 | xml.valueDouble("model.site.youngLabileN", -1), |
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98 | xml.valueDouble("model.site.youngLabileDecompRate", -1)), |
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99 | CNPool(xml.valueDouble("model.site.youngRefractoryC", -1), |
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100 | xml.valueDouble("model.site.youngRefractoryN", -1), |
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101 | xml.valueDouble("model.site.youngRefractoryDecompRate", -1)), |
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102 | CNPair(xml.valueDouble("model.site.somC", -1), xml.valueDouble("model.site.somN", -1))); |
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103 | } |
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104 | |||
105 | // setup variables |
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106 | mUnitVariables.nitrogenAvailable = GlobalSettings::instance()->settings().valueDouble("model.site.availableNitrogen", 40); |
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107 | |||
895 | werner | 108 | // if dynamic coupling of soil nitrogen is enabled, a starting value for available N is calculated |
534 | werner | 109 | if (mSoil && Model::settings().useDynamicAvailableNitrogen && Model::settings().carbonCycleEnabled) { |
110 | mSoil->setClimateFactor(1.); |
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111 | mSoil->calculateYear(); |
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895 | werner | 112 | mUnitVariables.nitrogenAvailable = soil()->availableNitrogen(); |
534 | werner | 113 | } |
664 | werner | 114 | mHasDeadTrees = false; |
534 | werner | 115 | mAverageAging = 0.; |
116 | |||
117 | } |
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118 | void ResourceUnit::setBoundingBox(const QRectF &bb) |
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119 | { |
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120 | mBoundingBox = bb; |
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121 | mCornerCoord = GlobalSettings::instance()->model()->grid()->indexAt(bb.topLeft()); |
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122 | } |
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123 | |||
124 | /// set species and setup the species-per-RU-data |
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125 | void ResourceUnit::setSpeciesSet(SpeciesSet *set) |
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126 | { |
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127 | mSpeciesSet = set; |
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128 | qDeleteAll(mRUSpecies); |
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129 | |||
130 | //mRUSpecies.resize(set->count()); // ensure that the vector space is not relocated |
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131 | for (int i=0;i<set->count();i++) { |
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132 | Species *s = const_cast<Species*>(mSpeciesSet->species(i)); |
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133 | if (!s) |
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134 | throw IException("ResourceUnit::setSpeciesSet: invalid index!"); |
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135 | |||
136 | ResourceUnitSpecies *rus = new ResourceUnitSpecies(); |
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137 | mRUSpecies.push_back(rus); |
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138 | rus->setup(s, this); |
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139 | /* be careful: setup() is called with a pointer somewhere to the content of the mRUSpecies container. |
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140 | If the container memory is relocated (QVector), the pointer gets invalid!!! |
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141 | Therefore, a resize() is called before the loop (no resize()-operations during the loop)! */ |
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142 | //mRUSpecies[i].setup(s,this); // setup this element |
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143 | |||
144 | } |
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145 | } |
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146 | |||
147 | ResourceUnitSpecies &ResourceUnit::resourceUnitSpecies(const Species *species) |
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148 | { |
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149 | return *mRUSpecies[species->index()]; |
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150 | } |
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151 | |||
152 | Tree &ResourceUnit::newTree() |
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153 | { |
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154 | // start simple: just append to the vector... |
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155 | if (mTrees.isEmpty()) |
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156 | mTrees.reserve(100); // reserve a junk of memory for trees |
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157 | |||
158 | mTrees.append(Tree()); |
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159 | return mTrees.back(); |
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160 | } |
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161 | int ResourceUnit::newTreeIndex() |
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162 | { |
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734 | werner | 163 | newTree(); |
164 | return mTrees.count()-1; // return index of the last tree |
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534 | werner | 165 | } |
166 | |||
167 | /// remove dead trees from tree list |
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168 | /// reduce size of vector if lots of space is free |
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169 | /// tests showed that this way of cleanup is very fast, |
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170 | /// because no memory allocations are performed (simple memmove()) |
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171 | /// when trees are moved. |
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172 | void ResourceUnit::cleanTreeList() |
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173 | { |
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664 | werner | 174 | if (!mHasDeadTrees) |
175 | return; |
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176 | |||
534 | werner | 177 | QVector<Tree>::iterator last=mTrees.end()-1; |
178 | QVector<Tree>::iterator current = mTrees.begin(); |
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179 | while (last>=current && (*last).isDead()) |
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180 | --last; |
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181 | |||
182 | while (current<last) { |
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183 | if ((*current).isDead()) { |
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184 | *current = *last; // copy data! |
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185 | --last; // |
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186 | while (last>=current && (*last).isDead()) |
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187 | --last; |
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188 | } |
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189 | ++current; |
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190 | } |
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191 | ++last; // last points now to the first dead tree |
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192 | |||
193 | // free ressources |
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194 | if (last!=mTrees.end()) { |
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195 | mTrees.erase(last, mTrees.end()); |
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196 | if (mTrees.capacity()>100) { |
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197 | if (mTrees.count() / double(mTrees.capacity()) < 0.2) { |
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198 | //int target_size = mTrees.count()*2; |
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199 | //qDebug() << "reduce size from "<<mTrees.capacity() << "to" << target_size; |
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200 | //mTrees.reserve(qMax(target_size, 100)); |
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664 | werner | 201 | if (logLevelDebug()) |
202 | qDebug() << "reduce tree storage of RU" << index() << " from " << mTrees.capacity() << "to" << mTrees.count(); |
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534 | werner | 203 | mTrees.squeeze(); |
204 | } |
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205 | } |
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206 | } |
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664 | werner | 207 | mHasDeadTrees = false; // reset flag |
534 | werner | 208 | } |
209 | |||
210 | void ResourceUnit::newYear() |
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211 | { |
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212 | mAggregatedWLA = 0.; |
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213 | mAggregatedLA = 0.; |
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214 | mAggregatedLR = 0.; |
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215 | mEffectiveArea = 0.; |
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216 | mPixelCount = mStockedPixelCount = 0; |
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217 | snagNewYear(); |
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609 | werner | 218 | if (mSoil) |
219 | mSoil->newYear(); |
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534 | werner | 220 | // clear statistics global and per species... |
221 | QList<ResourceUnitSpecies*>::const_iterator i; |
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222 | QList<ResourceUnitSpecies*>::const_iterator iend = mRUSpecies.constEnd(); |
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223 | mStatistics.clear(); |
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224 | for (i=mRUSpecies.constBegin(); i!=iend; ++i) { |
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225 | (*i)->statisticsDead().clear(); |
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226 | (*i)->statisticsMgmt().clear(); |
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662 | werner | 227 | (*i)->changeSapling().newYear(); |
534 | werner | 228 | } |
229 | |||
230 | } |
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231 | |||
232 | /** production() is the "stand-level" part of the biomass production (3PG). |
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233 | - The amount of radiation intercepted by the stand is calculated |
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234 | - the water cycle is calculated |
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235 | - statistics for each species are cleared |
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236 | - The 3PG production for each species and ressource unit is called (calculates species-responses and NPP production) |
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237 | see also: http://iland.boku.ac.at/individual+tree+light+availability */ |
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238 | void ResourceUnit::production() |
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239 | { |
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240 | |||
241 | if (mAggregatedWLA==0 || mPixelCount==0) { |
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936 | werner | 242 | // clear statistics of resourceunitspecies |
243 | for ( QList<ResourceUnitSpecies*>::const_iterator i=mRUSpecies.constBegin(); i!=mRUSpecies.constEnd(); ++i) |
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244 | (*i)->statistics().clear(); |
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245 | mEffectiveArea = 0.; |
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246 | mStockedArea = 0.; |
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534 | werner | 247 | return; |
248 | } |
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249 | |||
250 | // the pixel counters are filled during the height-grid-calculations |
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251 | mStockedArea = 100. * mStockedPixelCount; // m2 (1 height grid pixel = 10x10m) |
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252 | |||
253 | // calculate the leaf area index (LAI) |
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254 | double LAI = mAggregatedLA / mStockedArea; |
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255 | // calculate the intercepted radiation fraction using the law of Beer Lambert |
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256 | const double k = Model::settings().lightExtinctionCoefficient; |
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257 | double interception_fraction = 1. - exp(-k * LAI); |
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258 | mEffectiveArea = mStockedArea * interception_fraction; // m2 |
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259 | |||
260 | // calculate the total weighted leaf area on this RU: |
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261 | mLRI_modification = interception_fraction * mStockedArea / mAggregatedWLA; // p_WLA |
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262 | if (mLRI_modification == 0.) |
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263 | qDebug() << "lri modifaction==0!"; |
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264 | |||
611 | werner | 265 | if (logLevelDebug()) { |
534 | werner | 266 | DBGMODE(qDebug() << QString("production: LAI: %1 (intercepted fraction: %2, stocked area: %4). LRI-Multiplier: %3") |
267 | .arg(LAI) |
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268 | .arg(interception_fraction) |
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269 | .arg(mLRI_modification) |
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270 | .arg(mStockedArea); |
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271 | ); |
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611 | werner | 272 | } |
534 | werner | 273 | |
274 | // calculate LAI fractions |
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275 | QList<ResourceUnitSpecies*>::const_iterator i; |
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276 | QList<ResourceUnitSpecies*>::const_iterator iend = mRUSpecies.constEnd(); |
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277 | double ru_lai = leafAreaIndex(); |
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278 | if (ru_lai < 1.) |
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279 | ru_lai = 1.; |
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280 | // note: LAIFactors are only 1 if sum of LAI is > 1. (see WaterCycle) |
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281 | for (i=mRUSpecies.constBegin(); i!=iend; ++i) { |
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720 | werner | 282 | double lai_factor = (*i)->statistics().leafAreaIndex() / ru_lai; |
283 | DBGMODE( |
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284 | if (lai_factor > 1.) |
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285 | qDebug() << "LAI factor > 1"; |
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286 | ); |
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287 | (*i)->setLAIfactor( lai_factor ); |
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534 | werner | 288 | } |
289 | |||
290 | // soil water model - this determines soil water contents needed for response calculations |
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291 | { |
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292 | mWater->run(); |
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293 | } |
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294 | |||
295 | // invoke species specific calculation (3PG) |
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296 | for (i=mRUSpecies.constBegin(); i!=iend; ++i) { |
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297 | (*i)->calculate(); // CALCULATE 3PG |
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298 | if (logLevelInfo() && (*i)->LAIfactor()>0) |
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299 | qDebug() << "ru" << mIndex << "species" << (*i)->species()->id() << "LAIfraction" << (*i)->LAIfactor() << "raw_gpp_m2" |
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300 | << (*i)->prod3PG().GPPperArea() << "area:" << productiveArea() << "gpp:" |
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301 | << productiveArea()*(*i)->prod3PG().GPPperArea() |
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302 | << "aging(lastyear):" << averageAging() << "f_env,yr:" << (*i)->prod3PG().fEnvYear(); |
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303 | } |
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304 | } |
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305 | |||
306 | void ResourceUnit::calculateInterceptedArea() |
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307 | { |
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308 | if (mAggregatedLR==0) { |
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309 | mEffectiveArea_perWLA = 0.; |
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310 | return; |
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311 | } |
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312 | Q_ASSERT(mAggregatedLR>0.); |
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313 | mEffectiveArea_perWLA = mEffectiveArea / mAggregatedLR; |
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314 | if (logLevelDebug()) qDebug() << "RU: aggregated lightresponse:" << mAggregatedLR << "eff.area./wla:" << mEffectiveArea_perWLA; |
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315 | } |
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316 | |||
317 | // function is called immediately before the growth of individuals |
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318 | void ResourceUnit::beforeGrow() |
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319 | { |
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320 | mAverageAging = 0.; |
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321 | } |
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322 | |||
323 | // function is called after finishing the indivdual growth / mortality. |
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324 | void ResourceUnit::afterGrow() |
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325 | { |
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326 | mAverageAging = leafArea()>0.?mAverageAging/leafArea():0; // calculate aging value (calls to addAverageAging() by individual trees) |
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327 | if (mAverageAging>0. && mAverageAging<0.00001) |
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328 | qDebug() << "ru" << mIndex << "aging <0.00001"; |
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329 | if (mAverageAging<0. || mAverageAging>1.) |
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330 | qDebug() << "Average aging invalid: (RU, LAI):" << index() << mStatistics.leafAreaIndex(); |
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331 | } |
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332 | |||
333 | void ResourceUnit::yearEnd() |
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334 | { |
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335 | // calculate statistics for all tree species of the ressource unit |
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336 | int c = mRUSpecies.count(); |
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337 | for (int i=0;i<c; i++) { |
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338 | mRUSpecies[i]->statisticsDead().calculate(); // calculate the dead trees |
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339 | mRUSpecies[i]->statisticsMgmt().calculate(); // stats of removed trees |
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340 | mRUSpecies[i]->updateGWL(); // get sum of dead trees (died + removed) |
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341 | mRUSpecies[i]->statistics().calculate(); // calculate the living (and add removed volume to gwl) |
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342 | mStatistics.add(mRUSpecies[i]->statistics()); |
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343 | } |
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344 | mStatistics.calculate(); // aggreagte on stand level |
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345 | |||
346 | } |
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347 | |||
348 | void ResourceUnit::addTreeAgingForAllTrees() |
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349 | { |
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350 | mAverageAging = 0.; |
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351 | foreach(const Tree &t, mTrees) { |
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352 | addTreeAging(t.leafArea(), t.species()->aging(t.height(), t.age())); |
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353 | } |
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354 | |||
355 | } |
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356 | |||
357 | /// refresh of tree based statistics. |
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358 | /// WARNING: this function is only called once (during startup). |
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359 | /// see function "yearEnd()" above!!! |
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360 | void ResourceUnit::createStandStatistics() |
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361 | { |
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362 | // clear statistics (ru-level and ru-species level) |
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363 | mStatistics.clear(); |
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364 | for (int i=0;i<mRUSpecies.count();i++) { |
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365 | mRUSpecies[i]->statistics().clear(); |
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366 | mRUSpecies[i]->statisticsDead().clear(); |
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367 | mRUSpecies[i]->statisticsMgmt().clear(); |
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368 | } |
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369 | |||
370 | // add all trees to the statistics objects of the species |
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371 | foreach(const Tree &t, mTrees) { |
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372 | if (!t.isDead()) |
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373 | resourceUnitSpecies(t.species()).statistics().add(&t, 0); |
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374 | } |
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375 | // summarize statistics for the whole resource unit |
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376 | for (int i=0;i<mRUSpecies.count();i++) { |
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377 | mRUSpecies[i]->statistics().calculate(); |
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378 | mStatistics.add(mRUSpecies[i]->statistics()); |
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379 | } |
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380 | mStatistics.calculate(); |
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575 | werner | 381 | mAverageAging = mStatistics.leafAreaIndex()>0.?mAverageAging / (mStatistics.leafAreaIndex()*stockableArea()):0.; |
534 | werner | 382 | if (mAverageAging<0. || mAverageAging>1.) |
383 | qDebug() << "Average aging invalid: (RU, LAI):" << index() << mStatistics.leafAreaIndex(); |
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384 | } |
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385 | |||
720 | werner | 386 | /** recreate statistics. This is necessary after events that changed the structure |
387 | of the stand *after* the growth of trees (where stand statistics are updated). |
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388 | An example is after disturbances. */ |
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389 | void ResourceUnit::recreateStandStatistics() |
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390 | { |
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391 | for (int i=0;i<mRUSpecies.count();i++) { |
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392 | mRUSpecies[i]->statistics().clear(); |
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393 | } |
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394 | foreach(const Tree &t, mTrees) { |
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395 | resourceUnitSpecies(t.species()).statistics().add(&t, 0); |
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396 | } |
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937 | werner | 397 | for (int i=0;i<mRUSpecies.count();i++) { |
398 | mRUSpecies[i]->statistics().calculate(); |
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399 | } |
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720 | werner | 400 | } |
401 | |||
824 | werner | 402 | void ResourceUnit::setSaplingHeightMap(float *map_pointer) |
403 | { |
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404 | // set to zero |
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405 | mSaplingHeightMap=map_pointer; |
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406 | if (!mSaplingHeightMap) |
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407 | return; |
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408 | for (int i=0;i<cPxPerRU*cPxPerRU;i++) |
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409 | mSaplingHeightMap[i]=0.f; |
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410 | // flag all trees in the resource unit |
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411 | for (QVector<Tree>::const_iterator i=mTrees.cbegin(); i!= mTrees.cend(); ++i) { |
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412 | setMaxSaplingHeightAt(i->positionIndex(), 10.f); |
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413 | } |
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414 | } |
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415 | |||
534 | werner | 416 | void ResourceUnit::setMaxSaplingHeightAt(const QPoint &position, const float height) |
417 | { |
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418 | Q_ASSERT(mSaplingHeightMap); |
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419 | int pixel_index = cPxPerRU*(position.x()-mCornerCoord.x())+(position.y()-mCornerCoord.y()); |
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420 | if (pixel_index<0 || pixel_index>=cPxPerRU*cPxPerRU) { |
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421 | qDebug() << "setSaplingHeightAt-Error for position" << position << "for RU at" << boundingBox() << "with corner" << mCornerCoord; |
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422 | } else { |
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423 | if (mSaplingHeightMap[pixel_index]<height) |
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424 | mSaplingHeightMap[pixel_index]=height; |
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425 | } |
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426 | } |
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427 | |||
428 | /// clear all saplings of all species on a given position (after recruitment) |
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429 | void ResourceUnit::clearSaplings(const QPoint &position) |
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430 | { |
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431 | foreach(ResourceUnitSpecies* rus, mRUSpecies) |
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432 | rus->clearSaplings(position); |
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433 | |||
434 | } |
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435 | |||
662 | werner | 436 | /// kill all saplings within a given rect |
437 | void ResourceUnit::clearSaplings(const QRectF pixel_rect, const bool remove_from_soil) |
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438 | { |
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439 | foreach(ResourceUnitSpecies* rus, mRUSpecies) { |
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440 | rus->changeSapling().clearSaplings(pixel_rect, remove_from_soil); |
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441 | } |
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442 | |||
443 | } |
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444 | |||
600 | werner | 445 | float ResourceUnit::saplingHeightForInit(const QPoint &position) const |
446 | { |
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447 | double maxh = 0.; |
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448 | foreach(ResourceUnitSpecies* rus, mRUSpecies) |
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449 | maxh = qMax(maxh, rus->sapling().heightAt(position)); |
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450 | return maxh; |
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451 | } |
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534 | werner | 452 | |
453 | void ResourceUnit::calculateCarbonCycle() |
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454 | { |
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455 | if (!snag()) |
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456 | return; |
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457 | |||
458 | // (1) calculate the snag dynamics |
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459 | // because all carbon/nitrogen-flows from trees to the soil are routed through the snag-layer, |
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460 | // all soil inputs (litter + deadwood) are collected in the Snag-object. |
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461 | snag()->calculateYear(); |
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462 | soil()->setClimateFactor( snag()->climateFactor() ); // the climate factor is only calculated once |
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463 | soil()->setSoilInput( snag()->labileFlux(), snag()->refractoryFlux()); |
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464 | soil()->calculateYear(); // update the ICBM/2N model |
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465 | // use available nitrogen? |
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466 | if (Model::settings().useDynamicAvailableNitrogen) |
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467 | mUnitVariables.nitrogenAvailable = soil()->availableNitrogen(); |
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468 | |||
469 | // debug output |
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470 | if (GlobalSettings::instance()->isDebugEnabled(GlobalSettings::dCarbonCycle) && !snag()->isEmpty()) { |
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471 | DebugList &out = GlobalSettings::instance()->debugList(index(), GlobalSettings::dCarbonCycle); |
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605 | werner | 472 | out << index() << id(); // resource unit index and id |
534 | werner | 473 | out << snag()->debugList(); // snag debug outs |
474 | out << soil()->debugList(); // ICBM/2N debug outs |
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475 | } |
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476 | |||
477 | } |
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600 | werner | 478 | |
479 |