ESSI分布式水文模型在淮河流域的应用

Application of ESSI Distributed Hydrological Model in Huaihe River Basin

以淮河小柳巷水文站以上各支流组成的流域为研究对象,应用ESSI分布式水文模型对流域出口的年、月、日径流以及流域水文空间过程进行模拟以验证模型的适用性和模拟精度.选取合理的模型运行方案组合,以2001～2004年作为模型校准期,率定出模型参数,并用2006～2009年的实测水文数据进行模型验证.结果表明ESSI模型率定得到的参数在研究区具有一定的代表性,较为准确地概化描述了研究区的水文过程,在淮河流域中上游具有良好的适用性;此外,模拟的水文空间过程与淮河流域的客观规律相近,表明ESSI模型对各水文过程具有合理的描述和表达,为水资源的时空动态变化规律研究提供良好的模拟平台.

Applied the ESSI distributed hydrological model, the rainfall runoff in different time scales and the spatial distributions were simulated and forested in the upper reaches of the Huaihe River above the Xiaoliuxi- ang Station. By choosing suitable model scenario, model calibration parameters were achieved from calibration period （2001-2004） and reused in validation the period from 2006 to 2009. It is found that the ESSI model has good applicability and correctly describes the hydrological processes in the study area. Meanwhile, the spa- tial distribution simulated from ESSI shows great conformity with the objective laws of basin, indicating ESSI model has reasonable description and expression for the hydrological process. Above all, the ESSI model pro- vides a good simulation platform for researching spatial and temporal distribution of water resources.