The Feasibility Study Of Limited Water Level Dynamic Control At Shuangta Reservoir

The special geographical position and the characteristics of water resources in China determine the frequent floods, drought, water shortage,the contradiction of water resources, it is obvious in the inland water systems in the west. “Floodwater utilization”, The pilot work on dynamic control of reservoir in 2005 and The No. 1document from the national central government in 2011 promote the research and application of dynamic control of the limited water level. This paper aims to study the feasibility of the flood limited water level dynamic control of Shuangta reservoir where the rain is lack and the evaporation is strong as the largest agricultural irrigation reservoir in Gansu on the basis of exposition and summary of dynamic control of the limited water level.Limited flood water level is the key to coordinate the relationship between flood control and its irrigation level, It is of immediate significance how to realize the dynamic control of he limited water level and maximize the reservoir's economical benefits on the basis of the safety of the reservoir flood control.Using Shuangta reservoir historical hydrological information and the current advanced automation management information system of river basin to make the reservoir flood season scientific, reasonable and feasible, based on the existing theory of limited water level dynamic control to determine upper and lower limit level make full and efficient use of limited resources of the flood, reservoir comprehensive scheduling functions, reducing the reservoir sedimentation, protecting the downstream watershed ecologic, providing resource guarantee,ensuring the sustainable development of river basin ecological environment and agricultural production, effectively solving the contradiction between supply and demand of water resources in the irrigation area come true.By collecting related engineering, hydrological and meteorological data for management institute of Shuangta reservoir, management institute of Changma reservoir, Changma hydrological station, Panjiazhuang hydrological station, Shuangta hydrological station, Gansu institute of water resources and hydropower research and other units, the paper is to make it true that is dynamic control of the limited water level on the basin of fully study climate characteristics, hydrological characteristics,management status of its basin, review safety of the design criteria of Shuangta reservoir flood control, multiple methods to delimit the flood season of reservoir,determine the range of the limited water level dynamic control, research dynamic control of the limited water level at Shuangta reservoir by “pre-storage and pre-discharge”, identification and analysis of risk of the implementation of this scheme,at the same time, combined with practical engineering, experience of reservoir management and scientific scheduling.Implementing dynamic control level and scientific operation at Shuangta reservoir can effectively guarantee the normal summer irrigation 460000 mu in the irrigationarea,play to the river ecological function in the premise of not affect downstream ecological water supply better, increase hydroelectric power benefits of Shuangta hydropower station, promote the reservoir area ecological tourism resource development and increase benefits of reservoir fisheries aquaculture as reducing reservoir empty time, improve the reservoir flood resources utilization, improve the economy and ecological value of water resources, give full play to the reservoir engineering comprehensive benefit, effectively reduce the reservoir sedimentation rate,extend the life of the reservoir.