中文摘要：

针对中国南方丘陵水稻灌区水文特点,在对自然流域水文模型SWAT改进的基础上,构建了灌区分布式水文模型,改进了SWAT的灌溉水运动模块、稻田水分循环模块、稻田水量平衡各要素和产量模拟的计算方法,改变了陆面水文过程的计算结构,增加了渠系渗漏模拟模块及其对地下水的补给作用、塘堰的灌溉模块等。以湖北省漳河灌区内的一个闭合小流域为例,对构建的灌区分布式水文模型进行校正和验证,模拟结果显示,该模型适合于水稻灌区水分循环的模拟。

英文摘要：

The irrigation water movement module,paddy field water balance module,command loop of land phase of hydrological cycle in SWAT model and the calculation method of rice yield are improved to establish a new distributed hydrological model on the basis of SWAT.The module of canal seepage and its effect on supply of groundwater and the module of ponds effect on irrigation are added to further improve the new model.The model is calibrated and validated by the observed daily outflow data obtained from a closed s...