[关键词]
[摘要]
与传统土壤水分监测方法相比,遥感技术有明显的优势,能够方便快捷地获取大范围的地表信息,并能提高区域土壤水分监测的精确度。本文利用MODIS遥感产品和农业气象观测站点土壤水分数据,建立基于温度植被指数的表层土壤水分遥感估算模型,对泾河流域土壤水分进行模拟估算,并分析研究区2000年-2010年3月-10月份表层土壤水分时空分布特征。研究结果证实,基于地表温度和植被指数特征空间的方法能够较好地揭示泾河流域土壤水分的分布和变化特征。
[Key word]
[Abstract]
Compared with the traditional soil moisture monitoring methods, remote sensing technology has apparent advantages to obtain the large-scale land surface information rapidly and to improve the monitoring precision of regional soil moisture. In this paper, on the basis of Moderate Resolution Imaging Spectoradiometer (MODIS) and observed soil moisture data at the agro-meteorological monitoring stations, a remote sensing model of soil moisture based on temperature and vegetation index was developed and applied to estimate the soil moisture in the Jinghe Watershed and to analyze the spatio-temporal distribution of soil moisture between March and October from 2000 to 2010. The results showed that the method based on vegetation temperature condition index (VTCI) can reflect the distribution and variation of soil moisture in the Jinghe Watershed.
[中图分类号]
[基金项目]
中央级公益性科研院所基本科研业务费专项资金(HKY-JBYW-2013-22,HKY-JBYW-2013-23);国家自然科学基金项目(41301496,41301030);“十二五”国家科技支撑计划(2012BAB02B0403)