ZOU Qiang, WANG Qing, LIU Yan-guo. Evaluation Method of Debris-flow Susceptibility Using GIS and Logistic Model[J]. Bulletin of Soiland Water Conservation, 2014, 33(3): 185-189.
DOI:
ZOU Qiang, WANG Qing, LIU Yan-guo. Evaluation Method of Debris-flow Susceptibility Using GIS and Logistic Model[J]. Bulletin of Soiland Water Conservation, 2014, 33(3): 185-189. DOI: 10.13961/j.cnki.stbctb.2014.03.036.
Evaluation Method of Debris-flow Susceptibility Using GIS and Logistic Model
The formation conditions of debris flow were analyzed and the seven key indexes of hill slope
elevation
hill surface roughness
rock stratum
distance to faults
seismic intensity of earthquake and land use type were chosen for evaluating the susceptibility of debris flow. A model of debris flow susceptibility was established by introducing logistic regression
and the evaluation and mapping of debris flow susceptibility were completed for the highways. Subsequently
this proposed method was applied in a case study carried out on the Sichuan-Tibet section of national highway G318. Analysis of debris flow susceptibility for the whole highway showed that 78.61% of the total study area was situated in debris flow-prone areas
including the canyon areas of Dadu
Lanchang
Jinsha
Nu and Palongzangbu Rivers. It is suggested that sufficient attentions should be paid in debris flow forecast and prevention in road reconstruction and line selection for new highway.
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