Estimation of crop evapotranspiration of irrigation command area using remote sensing and GIS

被引：90

作者：

Ray, SS ^{[1
]}

Dadhwal, VK ^{[1
]}

机构：

[1] ISRO, Ctr Space Applicat, Remote Sensing Applicat Area, Agr Resources Grp, Ahmadabad 380015, Gujarat, India

来源：

AGRICULTURAL WATER MANAGEMENT | 2001年 / 49卷 / 03期

关键词：

crop evapotranspiration; crop coefficient; soil adjusted vegetation index; remote sensing; GIS;

D O I：

10.1016/S0378-3774(00)00147-5

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

This paper describes the use of satellite-based remote sensing (RS) data and geographic information system (GIS) tools for estimating seasonal crop evapotranspiration in Mahi Right Bank Canal (MRBC) command area of Gujarat, India. Crop coefficients (K-c) for various major crops grown in MRBC were estimated, empirically, from the RS derived soil adjusted vegetation index (SAVI) values. A reference crop evapotranspiration (ET0) map was generated from point meteorological observations. The K-c and ET0 maps were combined to generate seasonal crop evapotranspiration (ETcrop) map which highlighted spatial variation in ETcrop ranging from more than 600mm for healthy tobacco crops to less than 150mm for very poor wheat crops. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：239 / 249

页数：11

共 19 条

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