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1111 | werner | 2 | #ifndef SAPLINGS_H |
3 | #define SAPLINGS_H |
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4 | |||
5 | #include "grid.h" |
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1113 | werner | 6 | #include "snag.h" |
1111 | werner | 7 | |
1113 | werner | 8 | |
1111 | werner | 9 | struct SaplingTree { |
1113 | werner | 10 | SaplingTree() { clear(); } |
1111 | werner | 11 | short unsigned int age; // number of consectuive years the sapling suffers from dire conditions |
1118 | werner | 12 | short signed int species_index; // index of the species within the resource-unit-species container |
1111 | werner | 13 | unsigned char stress_years; // (upper 16bits) + age of sapling (lower 16 bits) |
14 | unsigned char flags; |
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15 | float height; // height of the sapling in meter |
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16 | bool is_occupied() const { return height>0.f; } |
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1118 | werner | 17 | void clear() { age=0; species_index=-1; stress_years=0; flags=0; height=0.f; } |
1158 | werner | 18 | void setSapling(const float h_m, const int age_yrs, const int species_idx) { height=h_m; age=static_cast<short unsigned int>(age_yrs); stress_years=0; species_index=static_cast<short signed int>(species_idx); } |
1111 | werner | 19 | }; |
20 | #define NSAPCELLS 5 |
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21 | struct SaplingCell { |
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22 | enum ECellState { CellInvalid=0, CellFree=1, CellFull=2}; |
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23 | SaplingCell() { |
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24 | state=CellInvalid; |
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25 | } |
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26 | ECellState state; |
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27 | SaplingTree saplings[NSAPCELLS]; |
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28 | void checkState() { if (state==CellInvalid) return; |
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1112 | werner | 29 | bool free = false; |
1111 | werner | 30 | for (int i=0;i<NSAPCELLS;++i) { |
31 | // locked for all species, if a sapling of one species >1.3m |
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1112 | werner | 32 | if (saplings[i].height>1.3f) {state = CellFull; return; } |
1111 | werner | 33 | // locked, if all slots are occupied. |
34 | if (!saplings[i].is_occupied()) |
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35 | free=true; |
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36 | } |
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37 | state = free? CellFree : CellFull; |
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38 | } |
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1117 | werner | 39 | /// get an index to an open slot in the cell, or -1 if all slots are occupied |
40 | int free_index() { |
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41 | for (int i=0;i<NSAPCELLS;++i) |
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42 | if (!saplings[i].is_occupied()) |
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43 | return i; |
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44 | return -1; |
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45 | } |
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46 | /// add a sapling to this cell, return a pointer to the tree on success, or 0 otherwise |
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47 | SaplingTree *addSapling(const float h_m, const int age_yrs, const int species_idx) { |
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48 | int idx = free_index(); |
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49 | if (idx==-1) |
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50 | return 0; |
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51 | saplings[idx].setSapling(h_m, age_yrs, species_idx); |
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52 | return &saplings[idx]; |
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53 | } |
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54 | /// return the maximum height on the pixel |
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55 | float max_height() { if (state==CellInvalid) return 0.f; |
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56 | float h_max = 0.f; |
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57 | for (int i=0;i<NSAPCELLS;++i) |
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58 | h_max = std::max(saplings[i].height, h_max); |
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59 | return h_max; |
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60 | } |
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61 | /// return the sapling tree of the requested species, or 0 |
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62 | SaplingTree *sapling(int species_index) { |
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63 | if (state==CellInvalid) return 0; |
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64 | for (int i=0;i<NSAPCELLS;++i) |
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65 | if (saplings[i].species_index == species_index) |
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66 | return &saplings[i]; |
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67 | return 0; |
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68 | } |
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1111 | werner | 69 | }; |
70 | class ResourceUnit; |
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1113 | werner | 71 | class Saplings; |
1111 | werner | 72 | |
1117 | werner | 73 | /** The SaplingStat class stores statistics on the resource unit x species level. |
74 | */ |
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1113 | werner | 75 | class SaplingStat |
76 | { |
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77 | public: |
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1115 | werner | 78 | SaplingStat() { clearStatistics(); } |
1113 | werner | 79 | void clearStatistics(); |
1158 | werner | 80 | void calculate(const Species *species, ResourceUnit *ru); |
1113 | werner | 81 | // actions |
82 | void addCarbonOfDeadSapling(float dbh) { mDied++; mSumDbhDied+=dbh; } |
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1111 | werner | 83 | |
1113 | werner | 84 | // access to statistics |
85 | int newSaplings() const { return mAdded; } |
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86 | int diedSaplings() const { return mDied; } |
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87 | int livingSaplings() const { return mLiving; } ///< get the number |
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88 | int recruitedSaplings() const { return mRecruited; } |
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89 | /// returns the *represented* (Reineke's Law) number of trees (N/ha) and the mean dbh/height (cm/m) |
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90 | double livingStemNumber(double &rAvgDbh, double &rAvgHeight, double &rAvgAge) const; |
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91 | |||
92 | double averageHeight() const { return mAvgHeight; } |
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93 | double averageAge() const { return mAvgAge; } |
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94 | double averageDeltaHPot() const { return mAvgDeltaHPot; } |
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95 | double averageDeltaHRealized() const { return mAvgHRealized; } |
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96 | /// return the number of trees represented by one sapling of the current species and given 'height' |
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97 | double representedStemNumber(float height) const; |
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98 | // carbon and nitrogen |
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99 | const CNPair &carbonLiving() const { return mCarbonLiving; } ///< state of the living |
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100 | const CNPair &carbonGain() const { return mCarbonGain; } ///< state of the living |
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101 | |||
102 | private: |
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103 | int mAdded; ///< number of trees added |
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104 | int mRecruited; ///< number recruited (i.e. grown out of regeneration layer) |
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105 | int mDied; ///< number of trees died |
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106 | double mSumDbhDied; ///< running sum of dbh of died trees (used to calculate detritus) |
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107 | int mLiving; ///< number of trees (cohorts!!!) currently in the regeneration layer |
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108 | double mAvgHeight; ///< average height of saplings (m) |
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109 | double mAvgAge; ///< average age of saplings (years) |
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110 | double mAvgDeltaHPot; ///< average height increment potential (m) |
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111 | double mAvgHRealized; ///< average realized height increment |
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112 | CNPair mCarbonLiving; |
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113 | CNPair mCarbonGain; ///< net growth (kg / ru) of saplings |
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114 | |||
115 | friend class Saplings; |
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116 | |||
117 | }; |
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1117 | werner | 118 | /** The Saplings class the container for the establishment and sapling growth in iLand. |
119 | * |
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120 | */ |
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1111 | werner | 121 | class Saplings |
122 | { |
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123 | public: |
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124 | Saplings(); |
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125 | void setup(); |
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126 | // main functions |
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127 | void establishment(const ResourceUnit *ru); |
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1113 | werner | 128 | void saplingGrowth(const ResourceUnit *ru); |
129 | |||
1117 | werner | 130 | // access |
1159 | werner | 131 | SaplingCell *cell(QPoint lif_coords, bool only_valid=true); |
1111 | werner | 132 | |
1113 | werner | 133 | static void setRecruitmentVariation(const double variation) { mRecruitmentVariation = variation; } |
134 | static void updateBrowsingPressure(); |
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135 | |||
1111 | werner | 136 | private: |
1159 | werner | 137 | bool growSapling(const ResourceUnit *ru, SaplingCell &scell, SaplingTree &tree, int isc, float dom_height, float lif_value); |
138 | //Grid<SaplingCell> mGrid; |
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1113 | werner | 139 | static double mRecruitmentVariation; |
140 | static double mBrowsingPressure; |
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1111 | werner | 141 | }; |
142 | |||
143 | #endif // SAPLINGS_H |