摘要
以WEP模型为基础,构建了基于物理机制的滦河流域分布式水文模型,采用500 m×500 m正方形网格,将流域离散为215 353个基本计算单元,采用"马赛克"法进行土地利用类型重归类,对冠层截留、地表过程、土壤过程、地下水过程以及汇流过程等水文过程进行连续30 a的模拟计算,并以桃林口水库水文站和滦县水文站的还原流量为准对模型进行了校验。结果表明:模型校验期模拟月径流与观测月径流之间的相关系数为0.85～0.94,纳什效率系数在0.72以上,模拟年径流误差控制在5%左右,表明该模型具有较高精度,可为流域水资源综合开发和管理提供支撑。
Based on the WEP model,a distributed hydrological model of Luanhe river basin was established.This model with the energy processes made a detailed description of the hydrological elements in Luanhe River.The whole basin was divided into 215 353 basic units with a size of 500 m×500 m,and the ＂mosaic＂ method was introduced in calculation of each unit,which reflected spatial variation of land use.The processes of hydrological cycle components such as canopy interception,surface process,soil process,the groundwater process and runoff were simulated in daily time steps for 30 years.Afterward,the model was calibrated and verified in accordance with the reverted flow data from the two gauge stations of Taolinkou Reservior and Luanxian County.During the calibration and verification period,the correlation coefficient between simulated and observed values are from 0.85 to 0.94,the Nash-Sutcliffe efficiency coefficients are all above 0.72,and the maximum error of water balance calculation is around 5%.The verification of model shows a higher accuracy,which can support the comprehensive development and management of the basin in the future.
出处
《人民黄河》
CAS
北大核心
2011年第7期53-55,共3页
Yellow River
基金
国家"973"计划项目(2006CB403402-3)
国家自然科学基金创新研究群体基金资助项目(50721006)
水利部公益性行业科研专项(200801015)
关键词
模型验证
模型开发
WEP模型
分布式水文模型
滦河流域
model verification
model development
WEP model
distributed hydrological model
Luanhe River Basin
