SHIBALIPU RESERVOIR COLLAPSE PREDICTION AND DISASTER CONTROL AT GULANG COUNTY IN GANSU PROVINCE

Shibalipu reservoir is a small\|scale reservoir built over Longgou River in Gulang country, Gansu province. It was constructed from 1970 and completed in 1974. Owing to the soil deposition, the reservoir capacity decrease sharply during 30 years, already doesn't meet the need of irrigation and living usage at present, so the managers of the reservoir administrative department decided to heighten the dam by 1.42 m. The water level will rise up and the reservoir collapse will extend. If the dam is heightened, the security of the highway and railway beside the reservoir bank will be reduced. To avoid the damage caused by reservoir and reduce the soil deposition, part of the reservoir bank must be protected.