顾及平原区微地貌的地形湿度指数及其地表水环境意义  

Research on topographic wetness index and its implications of surface water environment considering micro-reliefs on plains

作　　者：赵卫东[1,2] 龚俊豪 赵纪堂 杨文韬 高飞 ZHAO Weidong;GONG Junhao;ZHAO Jitang;YANG Wentao;GAO Fei(School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China;Anhui Ecological Engineering Technology Research Center, Hefei 230009, China;School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]安徽省生态工程技术研究中心,安徽合肥230009 [3]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2019年第1期113-118,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(41272251);安徽省自然科学基金资助项目(1508085MD62);虚拟地理环境教育部重点实验室开放基金资助项目(2012VGE04);安徽省国土资源科技资助项目(2012AHST0802)

摘　　要：我国平原区广泛分布的沟渠、水塘等微地貌对地表水环境的空间分布特征具有重要影响,为深入探究平原区微地貌对区域地表水环境的影响,文章利用添加微地貌特征线的方法,构建出顾及微地貌的数字高程模型(digital elevation model,DEM),据此计算出能够顾及微地貌的地形湿度指数(topographic wetness index,TWI),并进一步阐明其所蕴含的地表水环境意义。研究结果表明,顾及微地貌的TWI空间分布能较直观地反映区域地表水系的空间分布规律及其地表径流特征,特别是能够很好地反映地表积水区或易发展为积水区的空间分布规律,可为研究区的水环境保护、防洪与抗旱、农业生产等提供辅助决策依据。The micro-reliefs like canals and ponds distributed widely in the plains of China have an important influence on the spatial distribution characteristics of surface water environment. In this paper, the digital elevation model(DEM) considering the micro-reliefs on the plains is built by adding micro-geomorphological feature lines, the topographic wetness index(TWI) based on the DEM is calculated, and its implications of surface water environment are analyzed. The results show that the distribution characteristics of TWI considering micro-reliefs can intuitively reflect the spatial distribution of the surface water networks and the characteristics of surface runoff, in particular, the spatial distribution of surface water accumulated areas or the areas that will easily develop to be surface water accumulated areas. The results can provide the basis for the decision-making for the water environment protection, flood protection, drought resistance and agricultural production, etc.

关 键 词：数字高程模型(DEM) 地形湿度指数(TWI) 平原微地貌 地表水环境 

分 类 号：P284[天文地球—地图制图学与地理信息工程] P344[天文地球—测绘科学与技术]