论文部分内容阅读
干旱是一种周期性发生的自然现象,在其发生过程中有关的参数如地表植被覆盖度、温度和土壤表层含水量等均可以通过遥感信息反演,这些参数客观地反映了土壤水分状况的综合特征。本文利用遥感监测数据,结合基础的地理信息数据,使用改进的垂直干旱指数(MPDI)对我国河南省冬小麦区的旱情进行了有效监测,论述了改进的垂直干旱指数监测干旱的原理与方法,结果表明此方法能有效地实时监测地表的干旱情况。
Drought is a natural phenomenon that happens periodically. Relevant parameters such as vegetation cover, temperature and surface water content of soil during its occurrence can be retrieved by remote sensing information. These parameters objectively reflect the state of soil moisture Comprehensive characteristics. In this paper, we use the remote sensing monitoring data and the basic geographic information data to effectively monitor the drought in the winter wheat area of Henan Province in China by using the improved vertical drought index (MPDI). The principle and method of monitoring the drought with the improved vertical drought index are discussed. The results It shows that this method can effectively monitor the surface drought in real time.