衡邵干旱走廊监测中TVDI模型构建与预警

Construction and early warning of TVDI model in the condition monitoring of arid corridor in Hengyang and Shaoyang

介绍了衡邵干旱走廊地理国情监测中监测数据的来源、MODIS产品处理与分析、地表温度(LTS)、植被指数(NDVI)的获取、数据处理方法、TVDI产品处理、TVDI制备中地表温度产品、植被指数产品订正及TVDI分级产品制备。同时介绍了TVDI模型构建及预测方法并构建了适宜的TVDI与温度、相对湿度之间的线性回归TVDI预测模型,并对干旱风险的风险概率、灾害损失进行了预警。

This paper introduces the acquisition of surface temperature( LTS),vegetation index( NDVI),data processing method and TVDI preparation in the monitoring of the conditions of arid corridors in Hengyang and Shaoyang city.Then,we use AHP to build and predict drought TVDI model,and build a suitable TVDI model and temperature,linear regression TVDI prediction model between relative humidity,and predict risk probability and disaster loss of drought risk.