[Objective] We analyze the risk zoning of regional geo-harzards in order to provide a scientific basis for regional geo-hazards prevention and reduction in Zhouqu County

Gansu Province and similar areas.[Methods] We established regional risk assessment models for shallow geo-harzards under different rainfall characteristics

by using SINMAP model.[Results] The distribution pattern of disaster spot in low-lying areas was consistent with high humidity area. With the increasing of rainfall

the shallow soil moisture and area of wetness region increased gradually

and extended to the ridge and gentler slopes. With the rise of rainfall warning level

1 hour rainfall amount increased from 10 mm to 56 mm. The area proportion and landslide proportion in the stable region decreased by 22% and 38%

respectively

the related proportion in the unstable region increased by 121% and 125%

respectively

and the related proportion in the potentially unstable region was the highest

and reached to 35% and 39%

respectively. Meanwhile

the basically stable and potential unstable region was gradually transferred into unstable and very unstable region. The potential of geological harzard occurrence in the study area was increasing gradually. The geo-hazards such as landslides and debris flow could be triggered when the warning level was raised to the level Ⅳ blue warning

while when the warning level was raised to the level Ⅲ yellow warning

the risk degree of geo-hazards was increased significantly.[Conclusion] Rainfall is a factor that induced geo-hazards in Zhouqu County. In case of heavy rainfall suitable conditions

the risk of geo-hazards remains severe.