SWAT模型下河网水文过程分布式模拟研究

摘要

This paper selected the Liaohe river basin as the key area to study and adopted the SWAT model to formulate a complete modeling scheme for distributed simulation on the hydrological process of river net area in the plain.This scheme adopts the generalization method to shape the circle and crossing river net into single branch-style river net,so as to analyze the transmission process of original river course in the studied area based on the water transfer across the river in the distributary ratio of river course.Finally,combination with the observed values and simulated values of data,this paper researched and calculated respectively hydrological process of three different hydrological stations by analyzing the monthly runoff volume about the studied area from 2013 to 2015.The analyzed results show that SWAT model is suitable for simulating the distributed model of hydrological process in river net area of the plain in Liaoning Province.%文章选择辽河流域作为重点研究区,采用SWAT模型,制定一套针对平原河网区水文过程进行分布式模拟的完整建模方案.该方案采用概化方式,将环状及交叉河网处理成单一的枝状河网,以此结合河道分流比例跨子流域调水的方式,对该研究区原始河道的传输过程进行分析.文章最终通过对该研究区2013-2015年的月均径流量进行分析验证,结合数据观测值及模拟值分别对3个不同水文站的水文过程进行研究计算.分析结果表明,SWAT模型在辽宁省平原河网区水文过程分布式模拟中具有较高的适用性.