evaluation and zonation of effective factors on landslide occurrence of aladagh northern slopes

abstract this survey accomplished for asessment and mechanism recognition of chenaran watershed landslide effective factors and its zonation based via lim model. primarily recognized effective factors, through studing and field survey and evaluated by landslide index method(lim) then based on their weight in model, landslide hazard zonation was done.then evaluated this model competence in zonation,by cross operation between landslides and zonation maps.the results show that, shurijeh formation(ksh) consists of clay, marly & evaporites impermiable layers,soluble calcareous sement and maximal weight(lnwi=2.3341) is very important factor for landslide generating in chenaran watershed. then aquifers,garden landuse,altitude(1570-1715 meters) and its processes,slope(38-78.8 degrees) ,chenaran river undercutting and snow cover agent in shape of effective factors at mitigation shearing resistance and augmentation shearing stress have maximal impact at basin,s landslide.about 89.35 percent of basin,s landslides are located in areas with richly potential that shows this model ability at landslide zonation. keywords: chenaran watershed, aladagh, factors evaluation, landslide zonation, lim model.