洞庭湖平原水网区地表产水量计算

洞庭湖区河湖水网密布，纵横交错，各水量之间交换关系复杂，为准确评价该区水资源量，根据水量平衡的原理，依据相关的水文气象资料。将湖区下垫面分为水面、水田、不透水面和陆面等4部分，根据其不同的特点分别提出不同的产水量计算方法。建立了具有一定物理概念的产水计算模型，并在湖南省洞庭湖纯湖区的3个四级区套县的各部分天然年产水量计算中得到应用，对于水网地区的地表水资源量的计算具有一定的参考价值。

Calculation of Surface Water Yield in Drainage Area of Dongting Lake Plain

The fiver network is very dense in Dongting Lake area. In order to accurately evaluate the quantity of water resources, a water yield model was set up according to water quantity conservation theory and the concemed hydrologic and meteorological data. Underlying surface of the Dongting Lake area was divided into 4 layers, i.e. water surface, paddy field, water-impermeable layer and land. Different calculations were made for various layers. This model has been applied in yearly nature water yield calculation for 3 counties as calculation units in water body of Dongting Lake.