基于模糊几何加权模型的灌区水资源优化配置

针对农业水资源优化配置中多目标赋权的不确定性问题,以黑龙江省绰尔屯灌区为研究区域,构建了基于模糊几何加权法的灌区水资源优化配置模型,把多目标规划问题转化为单目标非线性问题,得到了不同权重下不同生育期的灌区水资源最佳配置方案,并通过灌区综合能力评价体系进行比选.结果表明:通过与线性多目标模糊规划模型的对比,模糊几何加权模型可以根据实际情况对不同目标的权重进行调整,得出该条件下的灌区水资源最佳配置方案;当灌水量权重为0.3和经济权重为0.7时为最优方案,水稻产值为8 245万元,分蘖期、拔节期、抽穗期、乳熟期的灌水量分别为1 154.56万、779.12万、539.45万、336.57万m³.验证了模糊几何加权法在灌区水资源优化配置的可行性应用,为灌区农业水资源高效利用提供参考方案和决策支持.

Study on optimal allocation of water resources in irrigation area based on fuzzy geometric weighted model

Aiming at the uncertainty of multi-objective weighting in the optimal allocation of agricultural water resources. Taking Chaoertun irrigation area in Heilongjiang province as the research area. A water resources optimal allocation model based on a fuzzy geometric weighted method was established to transform the multi-objective problem into a single-objective nonlinear problem. The optimal scheme of water resources in irrigation areas with different weights and different growth periods is obtained. Finally, it selected the optimal weight through the comprehensive evaluation system of the irrigation area. The results show that by comparing with the linear multi-objective fuzzy model, the fuzzy geometric weighted model can adjust the weights of multi-objective according to the actual situation, and obtain the optimal water allocation schemes of water resources in the irrigation area under this condition. When the weight of irrigation quantity is 0.3 and the weight of economy is 0.7, and the optimal allocation plan of water resources is obtained. The output value of rice is 82 450 000 yuan. The irrigation amount at the tillering stage, jointing stage, heading stage and milky-ripe stage is 1 154.56×10⁴, 779.12×10⁴, 539.45×10⁴ and 336.57×10⁴ m³, respectively. Likewise, the feasibility of applying the fuzzy geometric weighted method to the optimal allocation of water resources is verified, which provides a reference scheme and decision support for the efficient utilization of agricultural water resources in irrigation areas.