温润地区平原圩区产流机制研究

STUDY ON MECHANISM OF RUNOFF-YIELD IN PLAIN POLDERS

圩区广泛分布于我国南方大河的中下游沿江和滨湖地区，是重要的农业生产基地。但由于该地区低洼，地下水埋深浅，洪、涝、渍灾害特别严重，给农业生产带来不利。因此开展洪涝预报和渍害治理至为重要，而降雨径流计算是其首要解决的问题。从分析圩区自然地理特性和产流机制出发，建立了适合圩区的产流模型。其物理概念明确，结构简单合理，参数易于调试。对上海青浦县香花试验区１０场降雨径流模拟分析表明。

Polder is an important base of agricultural production,which is widely distributed over along the banks of middle-lower streams of large rivers in south of China and lakeshores.Because of low lying terain and shallow groundwater depth,flood and waterlogging disaster is very serious in this region,which makes harmful effects.on agricultrual production.In view of the above mentioned facts,it is very important to develop flood forecasting and waterlogging harnessing.while rainfall-runoff calculation is the kernel to solve these problems.This paper studies mechanism of runoff-yield by analyzing the process of runoff formation and geographical features of polders.Then the auhors have developed a runoff-yield model which is suitable for polers.The model′s physical concept is explicit;its structrue is simple and rational,and its parameters are apt to debug.To calibrate model parmeters and test model,the authors select Qing pu Xianghua experiment plot as a representative studied area to simulate runoff-yield volume.Results show that the model is feasible and reliable.