干旱地区农业研究2018，Vol.36Issue(3)：244-250,265,8.DOI:10.7606/j.issn.1000-7601.2018.03.36
基于地形校正TVDI的地下水位埋深反演
Estimation of groundwater level from TVDI after topographic correction
摘要
Abstract
In arid and semiarid areas,groundwater is the important water source for terrestrial vegetation sur-vival,but traditional method of monitoring underground water is waste time and energy.Acquiring large-scale and high-precision groundwater level in real or near-real time is critical.Based on the temperature vegetation drought in-dex(TVDI),three phase of Landsat 8 extract RVI(Ratio Vegetation Index),NDVI(Normalized Difference Vege-tation Index),EVI(Enhanced Vegetation Index),MSAVI(Modified Soil Adjusted Vegetation Index),DVI(Difference Vegetation Index)and Ts(Land Surface Temperatures),the DEM data were used to correct the Ts data for the reduction of the topographic influences by topographic relief,and the best groundwater depth inversion model was selected.The results indicated that:(1)DEM was used to regulate Ts based on the traditional TVDI,the coefficient of determination between TVDI before and after topographic correction and groundwater depth was im-proved from 0.4381 to 0.5053,which showed that the terrain correction could effectively improve the inversion ac-curacy of groundwater depth;(2)Compared the coefficient of determination between five different TVDI and soil moisture and groundwater depth by three phase of the image,in the whole,Ts-MSAVI was best,and the highbest R2was 0.5547 and 0.5202 respectively;(3)In case the soil moisture data were lacking,the groundwater depth distribution could be estimated by factors reflecting the relative soil water content.关键词
温度植被干旱指数(TVDI)/地形校正/地下水位埋深/土壤湿度Key words
TVDI/topographic correction/groundwater depth/soil moisture content分类
农业科技引用本文复制引用
蔡亮红,丁建丽,魏阳..基于地形校正TVDI的地下水位埋深反演[J].干旱地区农业研究,2018,36(3):244-250,265,8.基金项目
新疆维吾尔自治区重点实验室专项基金(2016D03001,2014KL005) （2016D03001,2014KL005）
新疆维吾尔自治区科技支疆项目(201591101) （201591101）
国家自然科学基金(U1303381,41261090,41161063) （U1303381,41261090,41161063）
