Multiperiod Optimisation of Irrigated Crops under Different Conditions of Water Availability

被引:8
|
作者
Kuschel-Otarola, Mathias [1 ]
Rivera, Diego [1 ,2 ]
Holzapfel, Eduardo [1 ,2 ]
Palma, Cristian D. [3 ]
Godoy-Faundez, Alex [2 ,3 ]
机构
[1] Univ Concepcion, Sch Agr Engn, Dept Water Resources, Chillan 3812120, Chile
[2] CONICYT FONDAP 15130015, Water Res Ctr Agr & Min CRHIAM, Chillan 3812120, Chile
[3] Univ Desarrollo, Fac Ingn, Ctr Sustentabilidad & Gest Estrateg Recursos CiSG, Concepcion 4040418, Chile
关键词
crop yield; water allocation; multiperiod optimisation; water transactions; water storage; CLIMATE-CHANGE; CROPPING PATTERN; CONJUNCTIVE USE; MANAGEMENT; RESOURCES; ALLOCATION; MODEL; SCARCITY; IMPACTS; SYSTEM;
D O I
10.3390/w10101434
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
We propose a nonlinear optimisation model which maximises profits by resource allocation on a monthly time scale, considering a monthly crop yield model. The proposed model was applied to six management scenarios (two seasonal and four monthly), nine conditions of water availability, and two situations of resource availability under Chilean conditions. These situations provided the same seasonal amount of resources, but different distributions over time. The model included improvements in water resource management such as water storage and water transactions, being the latter a monthly decision variable that can increase farmers' profits. According to our results, monthly scenarios gave high profits, even better with appropriate resource distribution. When water costs are high, water transactions allow loss reduction of up to 50%. Regarding labour, the lack of availability is more critical than the wages.
引用
收藏
页数:23
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