一、前言平原水网区的特点是:河网密布,下垫面一般都有水面、水稻田与旱地三类不同的地表情况,因此具有三种不同的产流模式。为了探索此类地区的水文变化规律,应先按照水量平衡与区域原则相结合的方法进行布站和测验,取得资料后,通过对资料的合理性检查,再分析三种产流模式的参数,找出规律,经过验证,达到移用的要求,并为改进今后的布站和测验方法提供依据。由于闭合测区的周界线长,进、出水口门多,测验工作量大,加以客水干扰和圩区的影响,以及水稻田内的调蓄水量缺乏观测资料,给产流分析增加了难度。为了克服这些不利因素,我们提出以蒸发系数、蓄满产流与净雨～径流(水稻田)相关三结合方法, I. INTRODUCTION The characteristics of the plain water network area are: the river network is densely covered, and the underlying surface generally has three different types of surface conditions such as water surface, paddy field and dry land. Therefore, there are three different flow patterns. In order to explore the law of hydrology variation in such areas, we should first deploy stations and test according to the method of combining water balance and regional principles. After obtaining the data, we can analyze the rationality of the data and then analyze the parameters of the three production modes, To find out the law, after verification, to meet the transfer requirements, and to improve the future distribution of cloth and test methods provide the basis. Due to the long circumference of the closed survey area, the large number of entrances and exits, the large test workload, the influence of passenger water disturbance and polder area, and the lack of observational data of water storage in the paddy fields, it is more difficult for the flow analysis . In order to overcome these unfavorable factors, we propose a combination of evapotranspiration, sediment accumulation and net rainfall ~ runoff (paddy fields)