防治土壤盐碱化最优灌排模型

将作物临界土壤含盐量和地下水临界埋深等概念应用于防治灌区土壤盐碱化最优规划,提出了非线性规划最优灌排模型.以新疆巩留县团结灌区灌排工程为实例,求解了不同年型(P=20%、50%、75%、95%)的防治土壤盐碱化灌排优化决策,求得的灌排水量、淋洗水量、作物生长季节土壤盐分动态变化及地下水位年内调控过程等结果,与灌区实际情况拟合较好.

An Optimal Irrigation Model for Prevention of Soil Salinization

An optimal irrigation and drainage non-linear programming model is proposed with the concepts of soil salinity threshold and critical underground water table,aimed at preventing soil salinization in irrigation district,furthermore,combined with the real conditions of Xinjiang Kongliu Unity irrigation district to approach the model.The solution of the model gives the optimal irrigation and drainage policies,regulation process of under-ground water table,variation process of soil salinity in the different crops planted area over a year,optimal leaching water over a growing season and preplanting leaching water for different crops aimed at preventing soil salinization for four typical years(P=20%、50%、75%、95%).