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鄱阳湖湖区属于平原水网区,水文观测和水文计算都存在困难。在充分考虑鄱阳湖湖区地形地貌和水文特征的基础上,将湖区下垫面分4种类型计算产流,并针对山丘区和平原区提出不同的汇流计算方法,建立基于平原水网区的半分布式水文模型模拟水文过程。利用湖区博阳河小流域1982、1985和1986年资料对模型参数进行率定与验证,结果达到精度要求。率定参数经地形修正后用于湖区水文模拟,计算了湖区洪水年1983年和枯水年1986年径流过程,得到模拟年份年径流系数分别为0.57和0.46,湖区全年产水量占鄱阳湖全流域入湖总水量的比重为13.21%和13.14%,模拟结果合理。构建的半分布式水文模型结构简单,物理意义明确,参数率定简单,对其他平原水网无资料地区径流模拟有一定参考价值,并为鄱阳湖洪水成因研究提供了依据。
Poyang Lake area belonged to plain water network area, hydrological observation and hydrological calculation are difficult. On the basis of fully considering the topography and hydrological characteristics of the Poyang Lake area, the runoffs of the lake area are divided into four types to calculate the runoff, and different flow calculation methods are proposed for the hill and plain areas. Based on the plain water network Semi-distributed hydrological model simulates hydrological processes. Based on the data of 1982, 1985 and 1986 in the Bo Yang River catchments in the lake area, the model parameters are calibrated and verified, and the results meet the accuracy requirements. The calibration data were used for the hydrological simulation in the lake area after the terrain correction. The runoff in 1986 and 2002 in the flood season of the lake was calculated. The annual runoff coefficients of the simulated year were 0.57 and 0.46 respectively. The proportion of total waters into the lake basin was 13.21% and 13.14%, the simulation results are reasonable. The constructed semi-distributed hydrological model is simple in structure, clear in physical meaning, simple in parameter definition, and has certain reference value for runoff simulation in unplanned water networks in other plain waters and provides the basis for the research on the cause of flood in Poyang Lake.