水利学报2017，Vol.48Issue(4)：457-466,10.DOI:10.13243/j.cnki.slxb.20160705
流域非闭合特性对岩溶地区水文过程模拟的影响
Effect of unclosed characteristics of the basin on hydrological modeling in Karst regions
摘要
Abstract
In karst areas,there is usually a complex subsurface water system due to the well-developed karst fractures,conduits and caves,which contributes to the special water cycle pattern.The existence of karst structure leads to the noncoincidence of the surface and underground watersheds and as a result,the basin becomes unclosed.In order to comprehend the effect of unclosed characteristics of a karst basin on hydrological modeling,the Chaotianhe River basin (an important subbasin of the Lijiang River basin) is selected as the study area.The Xinanjiang model is used as the hydrological model to simulate the rainfall-runoff process for a study period from 1996 to 2005.Through comparing calibrateion results obtained by using several different area values of the basin,the effect of watershed area selection on model simulation accuracy is analyzed.Furthermore,the water exchange pattern between the Chaotianhe River basin and the surrounding watershed was discussed.The results show that the NSE firstly increases and then decreases and the RE increases when the watershed area varies from 340 km2 to 460 km2.The NSE reaches the maximum and the RE closes to zero when the watershed area is near 380～390 km2.It implies that the reasonable watershed area shrinks by 8.9 ％-11.2 ％,compared with the surface watershed area of the Chaotianhe River basin,owing to a proportion of water flowing into the adjacent basins through karst structures.The performance of the hydrological model for Chaotianhe River basin is improved significantly by using the calibrated watershed area,especially for dry seasons.关键词
岩溶流域/非闭合特性/新安江模型/水文过程模拟Key words
karst basin/unclosed characteristic/Xinanjiang model/hydrological modeling分类
天文与地球科学引用本文复制引用
吴乔枫,刘曙光,蔡奕,蒋杨明..流域非闭合特性对岩溶地区水文过程模拟的影响[J].水利学报,2017,48(4):457-466,10.基金项目
水利部公益性项目(201401057) （201401057）
教育部留学回国人员科研启动基金(2013-1792) （2013-1792）
