Study On Desilting And Reducing Silt Of Reservoir In A Mountainous Area

The seriousness of the sediment of reservoir is expounded. Desilting of the reservoir and its research methods are summarized , then proposed research significance of desilting the reservoir. Systematically summarized technology of emptying scour sediment. Physical graphics for longitudinal profile of traceable scour process is established, and the equation of longitudinal profile change in the traceable scour process is established according to the physical graphics and its related conditions. Through the mathematical model of longitudinal profile change and the balance equation of sediment, we deduce calculation formula of eventually scour length and estimation formula of eventually scour quantity in the traceable scour process for reservoir in a mountainous area. And according to data of emptying scour sediment for Toutunhe in 1999, we verify calculation formula of eventually scour length and estimation formula of eventually scour quantity.An overview of characteristic and principle of reservoir lateral erosion, made qualitative analyses on its mechanism of gravity erosion. The characteristics and mechanism of these technologies are analyzed. The technology of high channel desilting and pipeline reduce deposition are introduced in detail. A simple method and formula are controlled for desilting parts and flow of beach area. Obtain an empirical formula for its width and depth according to measured data of high channel desilting on Toutunhe reservoir in 2001. Simultaneously, the sediment transport rate formula of full section and formula of sediment quantity for high channel desilting is deduced according to its features. Calibrate parameter of formula by means of some date of high channel desilting on Toutunhe reservoir in 2001, and then launching the sediment transport rate formula of high channel desilting. And we verify scour quantity of high channel desilting on Toutunhe reservoir in 2001. Finally, summarize the research achievements of text, and put forward its own prospects for the reservoir desilting.