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1 | |||
1111 | werner | 2 | #include "global.h" |
3 | #include "saplings.h" |
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4 | |||
5 | #include "globalsettings.h" |
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6 | #include "model.h" |
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7 | #include "resourceunit.h" |
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8 | #include "resourceunitspecies.h" |
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9 | #include "establishment.h" |
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10 | #include "species.h" |
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11 | #include "seeddispersal.h" |
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12 | |||
1113 | werner | 13 | double Saplings::mRecruitmentVariation = 0.1; // +/- 10% |
14 | double Saplings::mBrowsingPressure = 0.; |
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1111 | werner | 15 | |
1113 | werner | 16 | |
1111 | werner | 17 | Saplings::Saplings() |
18 | { |
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19 | |||
20 | } |
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21 | |||
22 | void Saplings::setup() |
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23 | { |
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1159 | werner | 24 | //mGrid.setup(GlobalSettings::instance()->model()->grid()->metricRect(), GlobalSettings::instance()->model()->grid()->cellsize()); |
25 | FloatGrid *lif_grid = GlobalSettings::instance()->model()->grid(); |
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1111 | werner | 26 | // mask out out-of-project areas |
27 | HeightGrid *hg = GlobalSettings::instance()->model()->heightGrid(); |
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1159 | werner | 28 | for (int i=0; i<lif_grid->count(); ++i) { |
29 | SaplingCell *s = cell(lif_grid->indexOf(i), false); // false: retrieve also invalid cells |
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30 | if (s) { |
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31 | if (!hg->valueAtIndex(lif_grid->index5(i)).isValid()) |
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32 | s->state = SaplingCell::CellInvalid; |
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33 | else |
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34 | s->state = SaplingCell::CellFree; |
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35 | } |
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36 | |||
1111 | werner | 37 | } |
38 | |||
39 | } |
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40 | |||
41 | void Saplings::establishment(const ResourceUnit *ru) |
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42 | { |
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43 | HeightGrid *height_grid = GlobalSettings::instance()->model()->heightGrid(); |
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44 | FloatGrid *lif_grid = GlobalSettings::instance()->model()->grid(); |
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45 | |||
1118 | werner | 46 | QPoint imap = ru->cornerPointOffset(); // offset on LIF/saplings grid |
47 | QPoint iseedmap = QPoint(imap.x()/10, imap.y()/10); // seed-map has 20m resolution, LIF 2m -> factor 10 |
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1111 | werner | 48 | |
1158 | werner | 49 | for (QList<ResourceUnitSpecies*>::const_iterator i=ru->ruSpecies().constBegin(); i!=ru->ruSpecies().constEnd(); ++i) |
50 | (*i)->saplingStat().clearStatistics(); |
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51 | |||
52 | double lif_corr[cPxPerHectare]; |
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53 | for (int i=0;i<cPxPerHectare;++i) |
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54 | lif_corr[i]=-1.; |
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55 | |||
1164 | werner | 56 | int species_idx; |
57 | QVector<int>::const_iterator sbegin, send; |
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58 | ru->speciesSet()->randomSpeciesOrder(sbegin, send); |
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59 | for (QVector<int>::const_iterator s_idx=sbegin; s_idx!=send;++s_idx) { |
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60 | //for (int s_idx = 0; s_idx<ru->ruSpecies().size(); ++s_idx) { |
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1111 | werner | 61 | |
62 | // start from a random species (and cycle through the available species) |
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1164 | werner | 63 | species_idx = *s_idx; |
1111 | werner | 64 | |
65 | ResourceUnitSpecies *rus = ru->ruSpecies()[species_idx]; |
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66 | // check if there are seeds of the given species on the resource unit |
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67 | float seeds = 0.f; |
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1118 | werner | 68 | Grid<float> &seedmap = const_cast<Grid<float>& >(rus->species()->seedDispersal()->seedMap()); |
1111 | werner | 69 | for (int iy=0;iy<5;++iy) { |
70 | float *p = seedmap.ptr(iseedmap.x(), iseedmap.y()); |
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71 | for (int ix=0;ix<5;++ix) |
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72 | seeds += *p++; |
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73 | } |
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74 | // if there are no seeds: no need to do more |
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75 | if (seeds==0.f) |
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76 | continue; |
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77 | |||
78 | // calculate the abiotic environment (TACA) |
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79 | rus->establishment().calculateAbioticEnvironment(); |
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80 | double abiotic_env = rus->establishment().abioticEnvironment(); |
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81 | if (abiotic_env==0.) |
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82 | continue; |
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83 | |||
84 | // loop over all 2m cells on this resource unit |
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1159 | werner | 85 | SaplingCell *sap_cells = ru->saplingCellArray(); |
1111 | werner | 86 | SaplingCell *s; |
87 | int isc = 0; // index on 2m cell |
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88 | for (int iy=0; iy<cPxPerRU; ++iy) { |
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1159 | werner | 89 | //s = mGrid.ptr(imap.x(), imap.y()+iy); // ptr to the row |
90 | s = &sap_cells[iy*cPxPerRU]; // pointer to a row |
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91 | isc = lif_grid->index(imap.x(), imap.y()+iy); |
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1111 | werner | 92 | |
1158 | werner | 93 | for (int ix=0;ix<cPxPerRU; ++ix, ++s, ++isc) { |
1111 | werner | 94 | if (s->state == SaplingCell::CellFree) { |
95 | // is a sapling of the current species already on the pixel? |
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96 | // * test for sapling height already in cell state |
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97 | // * test for grass-cover already in cell state |
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1158 | werner | 98 | SaplingTree *stree=0; |
99 | SaplingTree *slot=s->saplings; |
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100 | for (int i=0;i<NSAPCELLS;++i, ++slot) { |
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101 | if (!stree && !slot->is_occupied()) |
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102 | stree=slot; |
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103 | if (slot->species_index == species_idx) { |
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104 | stree=0; |
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105 | break; |
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1111 | werner | 106 | } |
107 | } |
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108 | |||
1158 | werner | 109 | if (stree) { |
1111 | werner | 110 | // grass cover? |
1159 | werner | 111 | float seed_map_value = seedmap[lif_grid->index10(isc)]; |
1111 | werner | 112 | if (seed_map_value==0.f) |
113 | continue; |
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1159 | werner | 114 | const HeightGridValue &hgv = (*height_grid)[lif_grid->index5(isc)]; |
1111 | werner | 115 | float lif_value = (*lif_grid)[isc]; |
1158 | werner | 116 | |
117 | double &lif_corrected = lif_corr[iy*cPxPerRU+ix]; |
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118 | // calculate the LIFcorrected only once per pixel |
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119 | if (lif_corrected<0.) |
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120 | lif_corrected = rus->species()->speciesSet()->LRIcorrection(lif_value, 4. / hgv.height); |
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121 | |||
1111 | werner | 122 | // check for the combination of seed availability and light on the forest floor |
1158 | werner | 123 | if (drandom() < seed_map_value*lif_corrected*abiotic_env ) { |
124 | // ok, lets add a sapling at the given position (age is incremented later) |
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125 | stree->setSapling(0.05f, 0, species_idx); |
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126 | s->checkState(); |
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127 | rus->saplingStat().mAdded++; |
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1111 | werner | 128 | |
1158 | werner | 129 | } |
1111 | werner | 130 | |
131 | } |
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132 | |||
133 | } |
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134 | } |
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135 | } |
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136 | |||
137 | } |
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138 | |||
139 | } |
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1113 | werner | 140 | |
141 | void Saplings::saplingGrowth(const ResourceUnit *ru) |
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142 | { |
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143 | HeightGrid *height_grid = GlobalSettings::instance()->model()->heightGrid(); |
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144 | FloatGrid *lif_grid = GlobalSettings::instance()->model()->grid(); |
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145 | |||
1159 | werner | 146 | QPoint imap = ru->cornerPointOffset(); |
1115 | werner | 147 | bool need_check=false; |
1159 | werner | 148 | SaplingCell *sap_cells = ru->saplingCellArray(); |
1113 | werner | 149 | for (int iy=0; iy<cPxPerRU; ++iy) { |
1159 | werner | 150 | //SaplingCell *s = mGrid.ptr(imap.x(), imap.y()+iy); // ptr to the row |
151 | SaplingCell *s = &sap_cells[iy*cPxPerRU]; // ptr to row |
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152 | int isc = lif_grid->index(imap.x(), imap.y()+iy); |
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1113 | werner | 153 | |
154 | for (int ix=0;ix<cPxPerRU; ++ix, ++s, ++isc) { |
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155 | if (s->state != SaplingCell::CellInvalid) { |
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1115 | werner | 156 | need_check=false; |
1113 | werner | 157 | for (int i=0;i<NSAPCELLS;++i) { |
158 | if (s->saplings[i].is_occupied()) { |
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159 | // growth of this sapling tree |
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160 | const HeightGridValue &hgv = (*height_grid)[height_grid->index5(isc)]; |
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161 | float lif_value = (*lif_grid)[isc]; |
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162 | |||
1159 | werner | 163 | need_check |= growSapling(ru, *s, s->saplings[i], isc, hgv.height, lif_value); |
1113 | werner | 164 | } |
165 | } |
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1115 | werner | 166 | if (need_check) |
167 | s->checkState(); |
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1113 | werner | 168 | } |
169 | } |
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170 | } |
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171 | |||
1158 | werner | 172 | |
173 | |||
174 | |||
175 | // store statistics on saplings/regeneration |
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176 | for (QList<ResourceUnitSpecies*>::const_iterator i=ru->ruSpecies().constBegin(); i!=ru->ruSpecies().constEnd(); ++i) { |
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177 | (*i)->saplingStat().calculate((*i)->species(), const_cast<ResourceUnit*>(ru)); |
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178 | (*i)->statistics().add(&((*i)->saplingStat())); |
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179 | } |
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1113 | werner | 180 | } |
181 | |||
1162 | werner | 182 | SaplingCell *Saplings::cell(QPoint lif_coords, bool only_valid, ResourceUnit **rRUPtr) |
1159 | werner | 183 | { |
184 | FloatGrid *lif_grid = GlobalSettings::instance()->model()->grid(); |
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185 | |||
186 | // in this case, getting the actual cell is quite cumbersome: first, retrieve the resource unit, then the |
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187 | // cell based on the offset of the given coordiantes relative to the corner of the resource unit. |
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188 | ResourceUnit *ru = GlobalSettings::instance()->model()->ru(lif_grid->cellCenterPoint(lif_coords)); |
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1162 | werner | 189 | if (rRUPtr) |
190 | *rRUPtr = ru; |
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1160 | werner | 191 | |
1159 | werner | 192 | if (ru) { |
193 | QPoint local_coords = lif_coords - ru->cornerPointOffset(); |
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194 | int idx = local_coords.y() * cPxPerRU + local_coords.x(); |
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195 | DBGMODE( if (idx<0 || idx>=cPxPerHectare) |
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196 | qDebug("invalid coords in Saplings::cell"); |
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197 | ); |
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198 | SaplingCell *s=&ru->saplingCellArray()[idx]; |
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199 | if (s && (!only_valid || s->state!=SaplingCell::CellInvalid)) |
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200 | return s; |
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201 | } |
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202 | return 0; |
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203 | } |
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204 | |||
1162 | werner | 205 | void Saplings::clearSaplings(const QRectF &rectangle, const bool remove_biomass) |
206 | { |
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207 | GridRunner<float> runner(GlobalSettings::instance()->model()->grid(), rectangle); |
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208 | ResourceUnit *ru; |
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209 | while (runner.next()) { |
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210 | SaplingCell *s = cell(runner.currentIndex(), true, &ru); |
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211 | if (s) { |
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212 | |||
213 | for (int i=0;i<NSAPCELLS;++i) |
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214 | if (s->saplings[i].is_occupied()) { |
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215 | if (remove_biomass) { |
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216 | ResourceUnitSpecies *rus = ru->resourceUnitSpecies(s->saplings[i].species_index); |
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217 | if (!rus && !rus->species()) { |
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218 | qDebug() << "Saplings::clearSaplings(): invalid resource unit!!!"; |
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219 | return; |
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220 | } |
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221 | rus->saplingStat().addCarbonOfDeadSapling( s->saplings[i].height / rus->species()->saplingGrowthParameters().hdSapling * 100.f ); |
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222 | } |
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223 | s->saplings[i].clear(); |
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224 | } |
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225 | s->checkState(); |
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226 | |||
227 | } |
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228 | } |
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229 | } |
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230 | |||
1113 | werner | 231 | void Saplings::updateBrowsingPressure() |
232 | { |
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233 | if (GlobalSettings::instance()->settings().valueBool("model.settings.browsing.enabled")) |
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234 | Saplings::mBrowsingPressure = GlobalSettings::instance()->settings().valueDouble("model.settings.browsing.browsingPressure"); |
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235 | else |
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236 | Saplings::mBrowsingPressure = 0.; |
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237 | } |
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238 | |||
1159 | werner | 239 | bool Saplings::growSapling(const ResourceUnit *ru, SaplingCell &scell, SaplingTree &tree, int isc, float dom_height, float lif_value) |
1113 | werner | 240 | { |
241 | ResourceUnitSpecies *rus = const_cast<ResourceUnitSpecies*>(ru->ruSpecies()[tree.species_index]); |
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242 | const Species *species = rus->species(); |
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243 | |||
244 | // (1) calculate height growth potential for the tree (uses linerization of expressions...) |
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245 | double h_pot = species->saplingGrowthParameters().heightGrowthPotential.calculate(tree.height); |
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246 | double delta_h_pot = h_pot - tree.height; |
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247 | |||
248 | // (2) reduce height growth potential with species growth response f_env_yr and with light state (i.e. LIF-value) of home-pixel. |
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249 | if (dom_height==0.f) |
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250 | throw IException(QString("growSapling: height grid at %1/%2 has value 0").arg(isc)); |
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251 | |||
252 | double rel_height = tree.height / dom_height; |
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253 | |||
254 | double lif_corrected = species->speciesSet()->LRIcorrection(lif_value, rel_height); // correction based on height |
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255 | |||
256 | double lr = species->lightResponse(lif_corrected); // species specific light response (LUI, light utilization index) |
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257 | |||
1118 | werner | 258 | rus->calculate(true); // calculate the 3pg module (this is done only if that did not happen up to now); true: call comes from regeneration |
259 | double f_env_yr = rus->prod3PG().fEnvYear(); |
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1113 | werner | 260 | |
1118 | werner | 261 | double delta_h_factor = f_env_yr * lr; // relative growth |
262 | |||
1113 | werner | 263 | if (h_pot<0. || delta_h_pot<0. || lif_corrected<0. || lif_corrected>1. || delta_h_factor<0. || delta_h_factor>1. ) |
264 | qDebug() << "invalid values in Sapling::growSapling"; |
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265 | |||
266 | // check browsing |
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267 | if (mBrowsingPressure>0. && tree.height<=2.f) { |
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268 | double p = rus->species()->saplingGrowthParameters().browsingProbability; |
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269 | // calculate modifed annual browsing probability via odds-ratios |
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270 | // odds = p/(1-p) -> odds_mod = odds * browsingPressure -> p_mod = odds_mod /( 1 + odds_mod) === p*pressure/(1-p+p*pressure) |
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271 | double p_browse = p*mBrowsingPressure / (1. - p + p*mBrowsingPressure); |
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272 | if (drandom() < p_browse) { |
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273 | delta_h_factor = 0.; |
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274 | } |
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275 | } |
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276 | |||
277 | // check mortality of saplings |
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278 | if (delta_h_factor < species->saplingGrowthParameters().stressThreshold) { |
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279 | tree.stress_years++; |
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280 | if (tree.stress_years > species->saplingGrowthParameters().maxStressYears) { |
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281 | // sapling dies... |
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1160 | werner | 282 | rus->saplingStat().addCarbonOfDeadSapling( tree.height / species->saplingGrowthParameters().hdSapling * 100.f ); |
1113 | werner | 283 | tree.clear(); |
1115 | werner | 284 | return true; // need cleanup |
1113 | werner | 285 | } |
286 | } else { |
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287 | tree.stress_years=0; // reset stress counter |
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288 | } |
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289 | DBG_IF(delta_h_pot*delta_h_factor < 0.f || delta_h_pot*delta_h_factor > 2., "Sapling::growSapling", "inplausible height growth."); |
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290 | |||
291 | // grow |
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292 | tree.height += delta_h_pot * delta_h_factor; |
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293 | tree.age++; // increase age of sapling by 1 |
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294 | |||
295 | // recruitment? |
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296 | if (tree.height > 4.f) { |
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297 | rus->saplingStat().mRecruited++; |
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298 | |||
299 | float dbh = tree.height / species->saplingGrowthParameters().hdSapling * 100.f; |
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300 | // the number of trees to create (result is in trees per pixel) |
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301 | double n_trees = species->saplingGrowthParameters().representedStemNumber(dbh); |
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302 | int to_establish = static_cast<int>( n_trees ); |
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303 | |||
304 | // if n_trees is not an integer, choose randomly if we should add a tree. |
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305 | // e.g.: n_trees = 2.3 -> add 2 trees with 70% probability, and add 3 trees with p=30%. |
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306 | if (drandom() < (n_trees-to_establish) || to_establish==0) |
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307 | to_establish++; |
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308 | |||
309 | // add a new tree |
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310 | for (int i=0;i<to_establish;i++) { |
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311 | Tree &bigtree = const_cast<ResourceUnit*>(ru)->newTree(); |
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312 | |||
1159 | werner | 313 | bigtree.setPosition(GlobalSettings::instance()->model()->grid()->indexOf(isc)); |
1113 | werner | 314 | // add variation: add +/-10% to dbh and *independently* to height. |
1158 | werner | 315 | bigtree.setDbh(static_cast<float>(dbh * nrandom(1. - mRecruitmentVariation, 1. + mRecruitmentVariation))); |
316 | bigtree.setHeight(static_cast<float>(tree.height * nrandom(1. - mRecruitmentVariation, 1. + mRecruitmentVariation))); |
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1113 | werner | 317 | bigtree.setSpecies( const_cast<Species*>(species) ); |
318 | bigtree.setAge(tree.age,tree.height); |
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319 | bigtree.setRU(const_cast<ResourceUnit*>(ru)); |
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320 | bigtree.setup(); |
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321 | const Tree *t = &bigtree; |
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322 | const_cast<ResourceUnitSpecies*>(rus)->statistics().add(t, 0); // count the newly created trees already in the stats |
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323 | } |
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324 | // clear all regeneration from this pixel (including this tree) |
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325 | tree.clear(); // clear this tree (no carbon flow to the ground) |
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326 | for (int i=0;i<NSAPCELLS;++i) { |
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1159 | werner | 327 | if (scell.saplings[i].is_occupied()) { |
1113 | werner | 328 | // add carbon to the ground |
1159 | werner | 329 | rus->saplingStat().addCarbonOfDeadSapling( scell.saplings[i].height / species->saplingGrowthParameters().hdSapling * 100.f ); |
330 | scell.saplings[i].clear(); |
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1113 | werner | 331 | } |
332 | } |
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1115 | werner | 333 | return true; // need cleanup |
1113 | werner | 334 | } |
335 | // book keeping (only for survivors) for the sapling of the resource unit / species |
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336 | SaplingStat &ss = rus->saplingStat(); |
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337 | ss.mLiving++; |
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338 | ss.mAvgHeight+=tree.height; |
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339 | ss.mAvgAge+=tree.age; |
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340 | ss.mAvgDeltaHPot+=delta_h_pot; |
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341 | ss.mAvgHRealized += delta_h_pot * delta_h_factor; |
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1115 | werner | 342 | return false; |
1113 | werner | 343 | } |
344 | |||
345 | void SaplingStat::clearStatistics() |
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346 | { |
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347 | mRecruited=mDied=mLiving=0; |
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348 | mSumDbhDied=0.; |
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349 | mAvgHeight=0.; |
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350 | mAvgAge=0.; |
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351 | mAvgDeltaHPot=mAvgHRealized=0.; |
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1158 | werner | 352 | mAdded=0; |
1113 | werner | 353 | |
354 | } |
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1158 | werner | 355 | |
356 | void SaplingStat::calculate(const Species *species, ResourceUnit *ru) |
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357 | { |
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358 | if (mLiving) { |
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359 | mAvgHeight /= double(mLiving); |
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360 | mAvgAge /= double(mLiving); |
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361 | mAvgDeltaHPot /= double(mLiving); |
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362 | mAvgHRealized /= double(mLiving); |
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363 | } |
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364 | |||
365 | // calculate carbon balance |
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366 | CNPair old_state = mCarbonLiving; |
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367 | mCarbonLiving.clear(); |
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368 | |||
369 | CNPair dead_wood, dead_fine; // pools for mortality |
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370 | // average dbh |
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371 | if (mLiving>0) { |
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372 | // calculate the avg dbh and number of stems |
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373 | double avg_dbh = mAvgHeight / species->saplingGrowthParameters().hdSapling * 100.; |
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374 | double n = mLiving * species->saplingGrowthParameters().representedStemNumber( avg_dbh ); |
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375 | // woody parts: stem, branchse and coarse roots |
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376 | double woody_bm = species->biomassWoody(avg_dbh) + species->biomassBranch(avg_dbh) + species->biomassRoot(avg_dbh); |
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377 | double foliage = species->biomassFoliage(avg_dbh); |
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378 | double fineroot = foliage*species->finerootFoliageRatio(); |
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379 | |||
380 | mCarbonLiving.addBiomass( woody_bm*n, species->cnWood() ); |
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381 | mCarbonLiving.addBiomass( foliage*n, species->cnFoliage() ); |
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382 | mCarbonLiving.addBiomass( fineroot*n, species->cnFineroot() ); |
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383 | |||
1160 | werner | 384 | DBGMODE( |
385 | if (isnan(mCarbonLiving.C)) |
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386 | qDebug("carbon NaN in SaplingStat::calculate (living trees)."); |
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387 | ); |
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388 | |||
1158 | werner | 389 | // turnover |
390 | if (ru->snag()) |
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391 | ru->snag()->addTurnoverLitter(species, foliage*species->turnoverLeaf(), fineroot*species->turnoverRoot()); |
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392 | |||
393 | // calculate the "mortality from competition", i.e. carbon that stems from reduction of stem numbers |
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394 | // from Reinekes formula. |
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395 | // |
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396 | if (avg_dbh>1.) { |
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397 | double avg_dbh_before = (mAvgHeight - mAvgHRealized) / species->saplingGrowthParameters().hdSapling * 100.; |
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398 | double n_before = mLiving * species->saplingGrowthParameters().representedStemNumber( qMax(1.,avg_dbh_before) ); |
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399 | if (n<n_before) { |
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400 | dead_wood.addBiomass( woody_bm * (n_before-n), species->cnWood() ); |
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401 | dead_fine.addBiomass( foliage * (n_before-n), species->cnFoliage() ); |
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402 | dead_fine.addBiomass( fineroot * (n_before-n), species->cnFineroot() ); |
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1160 | werner | 403 | DBGMODE( |
404 | if (isnan(dead_fine.C)) |
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405 | qDebug("carbon NaN in SaplingStat::calculate (self thinning)."); |
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406 | ); |
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407 | |||
1158 | werner | 408 | } |
409 | } |
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410 | |||
411 | } |
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412 | if (mDied) { |
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413 | double avg_dbh_dead = mSumDbhDied / double(mDied); |
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414 | double n = mDied * species->saplingGrowthParameters().representedStemNumber( avg_dbh_dead ); |
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415 | // woody parts: stem, branchse and coarse roots |
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416 | |||
417 | dead_wood.addBiomass( ( species->biomassWoody(avg_dbh_dead) + species->biomassBranch(avg_dbh_dead) + species->biomassRoot(avg_dbh_dead)) * n, species->cnWood() ); |
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418 | double foliage = species->biomassFoliage(avg_dbh_dead)*n; |
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419 | |||
420 | dead_fine.addBiomass( foliage, species->cnFoliage() ); |
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421 | dead_fine.addBiomass( foliage*species->finerootFoliageRatio(), species->cnFineroot() ); |
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1160 | werner | 422 | DBGMODE( |
423 | if (isnan(dead_fine.C)) |
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424 | qDebug("carbon NaN in SaplingStat::calculate (died trees)."); |
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425 | ); |
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426 | |||
1158 | werner | 427 | } |
428 | if (!dead_wood.isEmpty() || !dead_fine.isEmpty()) |
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429 | if (ru->snag()) |
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430 | ru->snag()->addToSoil(species, dead_wood, dead_fine); |
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431 | |||
432 | // calculate net growth: |
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433 | // delta of stocks |
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434 | mCarbonGain = mCarbonLiving + dead_fine + dead_wood - old_state; |
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435 | if (mCarbonGain.C < 0) |
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436 | mCarbonGain.clear(); |
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437 | |||
438 | |||
439 | GlobalSettings::instance()->systemStatistics()->saplingCount+=mLiving; |
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440 | GlobalSettings::instance()->systemStatistics()->newSaplings+=mAdded; |
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441 | |||
442 | } |
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1162 | werner | 443 | |
444 | double SaplingStat::livingStemNumber(const Species *species, double &rAvgDbh, double &rAvgHeight, double &rAvgAge) const |
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445 | { |
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446 | rAvgHeight = averageHeight(); |
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447 | rAvgDbh = rAvgHeight / species->saplingGrowthParameters().hdSapling * 100.f; |
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448 | rAvgAge = averageAge(); |
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449 | double n= species->saplingGrowthParameters().representedStemNumber(rAvgDbh); |
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450 | return n; |
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451 | // *** old code (sapling.cpp) *** |
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452 | // double total = 0.; |
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453 | // double dbh_sum = 0.; |
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454 | // double h_sum = 0.; |
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455 | // double age_sum = 0.; |
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456 | // const SaplingGrowthParameters &p = mRUS->species()->saplingGrowthParameters(); |
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457 | // for (QVector<SaplingTreeOld>::const_iterator it = mSaplingTrees.constBegin(); it!=mSaplingTrees.constEnd(); ++it) { |
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458 | // float dbh = it->height / p.hdSapling * 100.f; |
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459 | // if (dbh<1.) // minimum size: 1cm |
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460 | // continue; |
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461 | // double n = p.representedStemNumber(dbh); // one cohort on the pixel represents that number of trees |
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462 | // dbh_sum += n*dbh; |
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463 | // h_sum += n*it->height; |
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464 | // age_sum += n*it->age.age; |
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465 | // total += n; |
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466 | // } |
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467 | // if (total>0.) { |
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468 | // dbh_sum /= total; |
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469 | // h_sum /= total; |
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470 | // age_sum /= total; |
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471 | // } |
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472 | // rAvgDbh = dbh_sum; |
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473 | // rAvgHeight = h_sum; |
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474 | // rAvgAge = age_sum; |
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475 | // return total; |
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476 | } |