Using the tools o f VS 2005

SQL 2005

Surfer 8. 0

etc.

the regional services system o f drought monitoring and early warning and evaluating over Northwest China is built. The system is the first regional network system in Northw estern China. It is the B/ S structure and users can get much more information on meteorological drought

agricultural drought

and ecological droug ht by operating the system online. The system may supply over 50 indexes and model analysis

such as standardizatio n precipitation index

relative humid index

comprehensive drought index

Penman evapotranspiration

waterr esource evaluation

and drought disaster evaluation concerning to drought monitoring and early warning and evaluation

which all can be calculated automatically. The system is heavily integrated and automatic. Most operation processes can be finished automatically. Now the system has been used for drought monitoring and early warning and evaluation services over the northwest region for nearly two years and can supply drought services conveniently .