Study of Map Scale?s Affect on Land Slide HazardZonation by Haeri-Samiee Method (Case Study: Zendanchal atchments)

Category Engineering Geology
Group GSI.IR
Location 21th symposium on geosciences
Holding Date 21 May 2008

Abstract:
      Land slide as a natural hazard and occurs when conditions are favorable for the slope instability. Several majors' causes of land slide are: litology, slope gradient, fault, road and river, precipitation, moisture and earthquake. Land slide hazard zonation is referred to procedure of dividing a region to homogeneous portions based on grid cells of susceptibility classes. This research is aimed to land slide hazard zonation of Zendan Chal catchments in Golestan province by using of Haeri ? Samiee method. At first, factor maps were provided. After a maps superimposition process, mapping was normally carried out from land slide susceptibility matrix. Field work and report studies showed that many land slides were occurred in this region, but the final hazard map on a scale of 1: 25000 illustrated that more than % 94 of the catchments located in class of low and very low danger. Results showed that, land slide hazard zonation with Haeri ? Samiee method is not useful for providing a large scale map of land slide hazard. Using this method should be inclined to regional corrections.

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