Negative Influences Of Man's Engineering Activities And Evaluating About On Daqiaogou Debris Flow In Guandi Hydroelectric Power Station

As the development of people's societal and economic activity, people excessively exploit natural resources and the environment was destroyed continuously. These cause the natural disasters such as the debris flow become more serious. Therefore, the study and evaluation of the debris flow must be strengthened, economical and effective measures must be enforced to prevent disasters at full steam. The thesis analyses the debris flow happened in Daqiaogou of Guandi hydroelectric power station on Yalong River, attempts to expound the important influence on debris flow based on human engineering activities. In this thesis, reasonable discussions have been dug into this research domain.The thesis proceeds from the circumstances and characteristics of Daqiaogou debris flow, from the points of debris flow upgrowth history and debris flow source distribution, analyses the clearly relation of nearby debris flow and man-made factors, shows this debris flow has got off to wane, whereas nearby debris flow and man-made factors subsists obvious causality. The impact relation of four man-made factors and different kinds of man-made factors impact station in proper, draws the conclusion of that the Beixian road construction of the hydroelectric power station is the mostly inducement of the debris flow. According to its characters, the author calculates the debris flow's dynamical characteristics such as the velocity of flow, the wallop, the peak value flux and total flux, and so on. Since the happening easily degree of the debris flow is the possibility of the debris flow happening, the author defines the happening easily degree's thinking thread: firstly, it must be made sure clearly whether the ditch is debris flow ditch or not, then on the basis that it is confirmed debris flow ditch, its severity is calculated, and the possibility of the debris flow breaking out under the district rainfall condition must also be reckoned. The thesis also analyses the connection of debris flow and human engineering activities based on the history of this debris flow ditch and material distribution, attempts to educe the evidence of their causality. It also expounds the connection of human engineering activities and forest entironment, and considers using and...