洞庭湖平原水网区地表产水量计算

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

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。

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.