Development Characters And Negative Influences Of Haier Debris Flow In Longtoushi Hydroelectric Power Station

Longtoushi hydropower station is one of the large-scale step hydropower projects to be developed on Daduhe River recently. On the right side of reservoir of Longtoushi hydropower station, there stands a rather large-scale debris flow gulley-Haier gulley, which ever generated large-scale debris flow in history. According to design projects of feasibility study, some place of Xinmin town will be flooded when reservoir sluices, and immigrants will move to back of accumulation of Haier gulley. Field geological survey shows that Haier gulley debris flow through the relocation is important geological problem to the construction and running of the relocation.The thesis formulates the debris flow's development characteristics, including gulch characteristic, valley subzone characteristic, development history, development step and the happening easily degree; according to its character, selecting the latest research results at present, calculates the debris flow's the moving, dynamical characteristics and the scale, such as, the velocity of flow, the wallop, the peak value flux, and the total fluxIt is known that debris flow hazard degree is the possibility of the debris flow impairing, and the debris flow destructive effects mainly consist up impact and deposit of two aspects. In the thesis the energy replaces the scale to be used to calculate to establish model and analyze the debris flow hazard degree, as not only make the function of depositing of the debris flow reflected, but also is general to contain the impact of the debris flow destroying function. Because the happening easily degree of the debris flow is added to the hazard degree formula and the debris flow frequency value is weaken in the formula, it is greatly close to hazard degree meaning. At the same time, the thesis uses risk factor calculation formula by LiuxiLin to calculate hazard degree, and the results by two means are unanimous. According to the activity of debris flow, deposit degree and deposit extent, the thesis makes risk degree partition,and appraise the influence by Haier gulley debris flow to immigrant relocation; at last, prevention countermeasure suggest is putted forward.