Hazard assessment of geological disaster in Yaozhou district of Tongchuan City based on GIS
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Abstract:
Thro ug h the field investig atio n and data co llect ion of 120 landslides, 66 co llapses, and 2 small2scale debr is flow s in Yao zhou district o f Tong chuan City in Shaanx i Pro vince, the hazar d assessment index sy stems of geo log ical disasters o f land2 slide, collapse, and debr is flow wer e dev eloped. T he index es wer e quant ified using the GIS technolog y and info rmatio n amount model, and the index weig hts w ere determined by the information amount r anking r esult s and gr ey relational analy sis, w hich can generate the hazar d gr ade zoning maps of landslide, co llapse, and debr is flow in the study ar ea. The results showed t hat the haz2 ar d assessment of distinctio n disaster type based o n GIS follows the development cha racterist ics and law s of different disasters, which can pro vide the scientific basis fo r the classificat ion management o f g eolog ical disaster s in Yaozhou distr ict o f T ongchuan. Accor ding ly, the prev ention and co nt rol measures of lo cal geo log ical disasters can be mo re per tinent, prescriptiv e, and scient ific, and the metho d can be applied to the loess ar ea.
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