Developmental Characteristics and Emergency Prevention and Control Measures of Suojihai Mudslide in Qiabuqia Township,Gonghe County,Qinghai Province
The Suojihai Mudslide Gully in Chabucha Town,Gonghe County,Hainan Tibetan Autonomous Prefecture,Qinghai Province,experiences varying degrees of disasters during the flood season,with an increasing trend.In this paper,a variety of experimental analysis and calculations are carried out on the debris flow ditch on the north side of Suojihai Village,Qapcha Town,through a variety of means,such as engineering geological surveying and mapping,field in-situ testing,indoor test,data calculation,etc.Because there is no debris flow protection project on the north side of Suojihai Village,and since the neotectonic movement of the local debris flow gully,the area has shown an overall uplift,so that the Quaternary sediments constitute a high terrace,and the surface geology in the area is dominated by single-structure loess,double-layer silt and gravel soil under the strong erosion and cutting action of water flow in the later period.Under the action of heavy rainfall,the terrain is open and in the shape of"scoop",which is conducive to the collection of surface precipitation,and there is no fixed drainage and diversion measures at the mouth of the ditch,which is the main premise for the occurrence of debris flow disasters.According to the development characteristics of the debris flow gully,this paper proposes to build a retaining dam in the middle and upper reaches of the ditch to intercept the source of large particles of solid matter in the debris flow.A drainage channel was constructed at the mouth of the downstream ditch to reduce the undercutting of the channel by debris flow,stabilize the ditch bed,and discharge the filtered rainwater and fine particles to the safety zone,so as to provide reference for related disaster prevention and control.
SojihaiCharacteristics of debris flow fluidsBlockage coefficientEmergency governance engineering
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