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disaggregation_of_yield_and_irrigation

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disaggregation_of_yield_and_irrigation [2020/03/29 11:20] matsz [Data preparation (disyield.gms)] |
disaggregation_of_yield_and_irrigation [2020/03/29 11:22] (current) matsz [Data preparation (disyield.gms)] |
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\begin{equation} | \begin{equation} | ||

- | y_{h,p,y}= \sum_g \{f_{h,g} \cdot y_{g,p,y} /} \sum_g \{f_{h,g}\} | + | y_{h,p,y}= \sum_g \{ f_{h,g} \cdot y_{g,p,y} \} \sum_g \{ f_{h,g} \} |

\end{equation} | \end{equation} | ||

- | \(y_{h,p,y}\) Yields simulated with PESETA [parameter, kg/ha] on PESETA grid //g// and for PESETA crop //p// under water limited and potential conditions \(y \in \{wyl,relpy\}\). \\ | + | \(y_{h,p,y}\) = Yields simulated with PESETA [parameter, kg/ha] on PESETA grid //g// and for PESETA crop //p// under water limited and potential conditions \(y \in \{wyl,relpy\}\). \\ |

- | \(f_{h,g}\) Fraction of spatial unit //h// in PESETA grid //g// [parameter, dimensionless]. The sum of \(f_{h,g}\) over all spatial units //h// gives 1 unless a few occasions where spatial inaccuracies leave small shares of a spatial unit outside the land area covered by the PESETA grid. | + | \(f_{h,g}\) = Fraction of spatial unit //h// in PESETA grid //g// [parameter, dimensionless]. The sum of \(f_{h,g}\) = over all spatial units //h// gives 1 unless a few occasions where spatial inaccuracies leave small shares of a spatial unit outside the land area covered by the PESETA grid. |

(iv) Calculation of relative water limited yield per spatial unit | (iv) Calculation of relative water limited yield per spatial unit | ||

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\end{equation} | \end{equation} | ||

- | \(r_{h,c}^{wly}\) Relative water limited yield [parameter, dimensionless] of PESETA crop //p// in spatial unit //h//. | + | \(r_{h,c}^{wly}\) = Relative water limited yield [parameter, dimensionless] of PESETA crop //p// in spatial unit //h//. \\ |

- | \(y_{h,p}^{wly}\) Water limited yield [parameter, kg/ha] of PESETA crop //p// in spatial unit //h// | + | \(y_{h,p}^{wly}\) = Water limited yield [parameter, kg/ha] of PESETA crop //p// in spatial unit //h// \\ |

- | \(\overline{y_{h,p}^{wly}}\) Averge water limited yield [parameter, kg/ha] of PESETA crop //p// over all spatial units //h// in region //r// | + | \(\overline{y_{h,p}^{wly}}\) =Averge water limited yield [parameter, kg/ha] of PESETA crop //p// over all spatial units //h// in region //r// |

If the water limited yield for a PESETA crop is missing for a spatial unit, but available in other spatial units in the same region, the area-weighted water limited yield for the PESETA crop over the region is assigned to the spatial unit. | If the water limited yield for a PESETA crop is missing for a spatial unit, but available in other spatial units in the same region, the area-weighted water limited yield for the PESETA crop over the region is assigned to the spatial unit. |

disaggregation_of_yield_and_irrigation.txt · Last modified: 2020/03/29 11:22 by matsz

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