利用植被供水指数法监测干旱的研究

Research of Vegetation Supply Water Index to Monitoring of Drought

利用FY-1D/AVHRR数据通道12、的反射率计算植被指数和通道4、5的亮温计算作物冠层温度,进而求出植被供水指数可监测干旱状况。本文简单介绍了利用FY-1D/AVHRR数据植被供水指数法监测生长季的干旱状况。研究表明,该方法所得结果从总体趋势看,与实际情况基本吻合。因此,植被供水指数法适用于生长季大范围的干旱监测。

Using reflectivity of FY - ID/AVHRR datum channel No. 1 and No.2, crop canopy temperature was calculated by vegetation index and brightness temperature datum from satellite channel No.4 and No.5, then drought status was monitoring with the method of vegetation supply water index. The paper simply introduced this method how to monitor drought status. Results shown vegetation supply water index was the same with large- scale drought monitoring because calculated results by this method tallied with actual situation.