黑河流域土壤墒情预报模型

Soil moisture prediction model for Heihe River Basin

针对黑河流域水资源匮乏问题,考虑了流域下垫面因素、气象因素以及实时灌溉的空间分布对土壤墒情的影响,为满足流域水资源实时调度模型系统的需求,建立了适合于该流域的土壤墒情预报模型;利用该模型对黑河流域2001年研究区内各计算单元不同作物的净灌溉定额和需水量进行计算,并与传统方法计算的需水量比较来检验模型的可行性。在黑河流域水资源实时调度需水计算中进行了初步应用,结果表明该模型能满足流域水资源实时调度的需要。

In view of the current situation of water resources shortage in the Heihe River Basin, a soil moisture prediction model, which could meet the requirement of the real-time allocation system of river basin water resources, was developed with consideration of the effects of underlying surface, the meteorological factor, and the spatial distribution of real-time irrigation on the soil moisture. The model was applied to calculating the net irrigation quota and water demand of each calculation unit of different crops in the studied area in the Heihe River Basin for 2001, and the feasibility of the method was verified by comparison of the calculated results with those of the conventional methods. The preliminary application shows that the prediction model can meet the requirement of real-time allocation of water resources in the Heihe River Basin.