Abstract
The gully, Anjiagou, located in Gaodian Village of Miansi Town, Wenchuan County, in Aba Autonomous Prefecture of Sichuan Province, is an old debris flow gully. Influenced by “5.12” Wenchuan earthquake, lots of secondary geological disasters as landslide, slump or unstable slope occurred in the gully; further, adverse geologic phenomena got worse; loose or porous solid material source increased largely. These resulted in highly debris flow proneness and rising danger.That is, Possibility of large-scale debris flow occurrence increased greatly. As is usual in disaster-stricken area, earthquake makes geo-environment deteriorate seriously. Projects in such area, which have passed geo-environmental assessment, should be reevaluated.
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