Research on the Operational System of Drought Monitoring by Remote Sensing in China

FENG Qiang; TIAN Guo-liang; LIU Qin-huo

doi:10.11834/jrs.20030103

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Research on the Operational System of Drought Monitoring by Remote Sensing in China
Issue 1, Pages: 14-18(2003)
Published：2003
DOI： 10.11834/jrs.20030103
稿件说明：

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[1]冯强,田国良,柳钦火.全国干旱遥感监测运行系统的研制[J].遥感学报,2003(01):14-18+81. DOI： 10.11834/jrs.20030103.

FENG Qiang, TIAN Guo-liang, LIU Qin-huo. Research on the Operational System of Drought Monitoring by Remote Sensing in China[J]. Journal of Remote Sensing, 2003, (1): 14-18. DOI： 10.11834/jrs.20030103.

摘要

该研究利用 1981— 1994年的NOAAAVHRR 8km分辨率的NDVI资料

以及对应时段全国 10 2个固定农业观测站的 2 0cm深的土壤湿度资料

建立了植被状态指数（VCI）与土壤湿度之间的统计模型

由土壤湿度旱情等级标准来换算出每旬用VCI进行干旱监测的旱情等级标准

以确定出全国的旬旱情分布状况。在此工作的基础上建成了“全国干旱遥感监测运行系统”

该运行系统使遥感手段监测全国干旱成为可能

将能提供每年 3— 9月每旬全国的干旱监测情况

为国家有关决策部门提供干旱减灾的决策依据。

Abstract

VCIcomputed from NDVIis a recommendatory index usually used in drought monitoring by remote sensing

but it could be different criterion on scaling the drought severity in different region. It is more important to get an objective scaling method forVCIthanVCIitself. By analyzing the historic data （1981-1994） of NOAA AVHRR NDVI（resolution of 8 km） and soil humidity （-20cm） observed by 102 permanent agro-meteorological stations in the whole China

the statistical models have been made out between the vegetation condition index （VCI） and the soil moisture index （SHI）. The scales of VCIin determining the drought severity can easily form the ones of SHIin describing the drought through the models

so drought monitoring in every ten days is practical. Based on that

the operational system of drought monitoring by remote sensing in China has been developed

which can be used to monitor the occurrence of the drought in China for every ten days from March to September. It would be beneficial to policy-maker for disaster reduction.