RISK ASSESSMENT OF GEOLOGICAL HAZARDS IN SUIDE CITY, SHAANXI PROVINCE

Risk assessment of geo-hazards has important significance for geo-hazards prevention and management.Suide city is located in the hinterland of North Shaanxi Loess Plateau.In this field, crisscross gulleys, steep topography, fierce landform incision, and rainfall caused many geological hazards.This paper tries to assess the risk of geo-hazards in Suide city.The urban slope area is divided into 1050 slope units.The stability of each slope unit under different water content conditions is calculated.The hazard of the slope units are assessed by combining the soil moisture content monitoring data.On this basis, the elements at risk in the slope units are identified using 1:10000 remote sensing data, and it's vulnerability is analyzed and it's consequence is assessed.Risk assessment of geo-hazards is completed on the basis of slope unit according to the results of the assessment of hazards and consequences in Suide city and the surrounding area.The assessment results show that the very high risk area is 2.27 km², including 106 slope units.The high risk area is 3.03 km², including 114 slope units.The medium risk area is 10.40 km², including 362 slope units.The low risk area is 12.81 km², including 468 slope units