Monitoring Agricultural Drought in China - Monitoring and Predicting Agricultural Drought: A Global Study - page 362

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Fig ure 28.3 Operational system for drought early warning in the North China Plain.

D rought Early Warning System
Using some of the indices described above, an operational system for
drought early warning for North China Plain (NCP) was designed (Tian
et al., 1997), as illustrated in figure 28.3. Atmospheric and geometric cor-
rections are made in the AVHRR data before estimating temperature and
albedo. Meteorological data and CWSI images are appropriately regis-
tered. Finally, the system integrates drought models and remote sensing
and meteorological data to produce a series of drought maps and reports.

G eographic Information System Database

The Geographic Information System (GIS) database has been set up for the
management and application of historical data and real-time meteorologi-
cal data for drought monitoring in NCP. The database comprises: (1) the-
matic, county-level, soil texture, water table, and geomorphological maps;
(2) meteorological data, including rainfall data (1949-94), daily meteoro-