This paper focused on analyzing the vulnerability
degree on debris flow hazards, which is affected by
various environmental factors. The correlation
degree between different influencing factors and debris flow disaster
susceptibility were studied using grey correlation analysis based on the
analysis and summary of the field survey results on influencing factors for
debris flow hazards in different debris flow gullies of Nanyu in Zhouqu County, Gansu
Province, China which included the “August
8” large debris flow disaster instance. The
results show that the susceptibility of debris flow disaster is relatively
similar for the factors such as bank slope, channel
blockage, and scouring range, the
slope gradient and length of channel, vegetation, drainage
area, and
population density, solid matter source and geological hazards
points density. For the different gullies in the same area, the
hazard level of the debris flow disaster is impacted significantly by the bank
slope, the
channel blockage, the scouring range, the
slope gradient, and the channel length. The
model can predict the vulnerability of debris flow and provide important
information in the hazard prevention and control.
GUO Guang-ling, GUO Rui, GU Jian-feng, LI Jun, GUO Hong, CHEN Neng-yuan
. 灰色理论在舟曲南屿沟泥石流灾害危险性评价中的应用研究[J]. Arid Land Geography, 2020
, 43(1)
: 20
-26
.
DOI: 10.12118/j.issn.1000-6060.2020.01.03
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