国土资源遥感Issue(3)：77-83,7.DOI:10.6046/gtzyyg.2015.03.14
基于作物缺水指数的土壤含水量估算方法
Estimation of soil moisture based on crop water stress index
摘要
Abstract
In this paper, the authors calculated the amount of the actual evapotranspiration based respectively on double layer model and improved double layer model in consideration of the available water rate of soil with MODIS data and meteorological data so as to investigate the temporal and spatial distribution of soil moisture and dynamic changes in Xuzhou City, Jiangsu Province. The amount of the potential evapotranspiration was calculated by using Penman-Monteith formula. Models were built to estimate the relative content of water of Xuzhou in July and November 2010 , by crop water stress index ( CWSI ) obtained by the actual evapotranspiration and the potential evapotranspiration . The result shows that the relative error of the estimated data based on the improved double layer model and that of the measured data are 3. 47% and 6. 03% respectively, with the correlation coefficient being 0. 84 and 0. 84, which are better than the results obtained by the model based on the double layer model, whose relative error is 5 . 89% and 9 . 6%, and whose correlation coefficient is 0 . 53 and 0 . 72 .关键词
作物缺水指数(CWSI)/双层模型/土壤水分可供率/土壤相对含水量/徐州市Key words
crop water stress index( CWSI)/double layer model/available water rate of soil/relative content of water/Xuzhou City分类
信息技术与安全科学引用本文复制引用
虞文丹,张友静,郑淑倩..基于作物缺水指数的土壤含水量估算方法[J].国土资源遥感,2015,(3):77-83,7.基金项目
国家重点基础研究发展计划“973”计划项目“气候变化对区域水循环的影响机理研究”(编号:2010CB951101)资助。 （编号:2010CB951101）
