Water Resources Argumentation Of Nanzhai Reservoir Expansion Projects In Changle County

Water is the source of life, and it is an important resource for human survival and development. With the rapid development of economy and society, the demand of water resources is more and more high, and water resources become an important support and guarantee to support the sustainable development of economy and society. At present, Weifang City Economic and social development also faces shortage of total water resources, water hazard is serious, water ecological environment destruction and so on a series of serious problem, become the bottleneck that restricts people’s normal production and life and economic and social sustainable development. Therefore, how to optimize the allocation, rational exploitation and efficient use of the city’s water resources to meet the needs of social development, has become an important and urgent task.Rather than through the new project to increase the total amount of water resources allocation, development status of water supply project has the potential to increase the water storage is more reasonable and feasible can not only save project investment and reduce the occupation of arable land, but also can greatly shorten the construction time, a significant economic and social benefits. Therefore, in Changle County, the total water supply shortage situation, the status of the Nanzhai Reservoir expansion can increase the amount of surface water impoundment, increased rainfall and flood resource utilization ability, and for Changle City and the surrounding water increase the water supply and water for the county water supply pattern, safeguard Changle County urban water supply security.However, whether it is new construction, renovation and extension of water conservancy project, is bound to water resources allocation of the area around the change and need strict water resources argumentation, in order to guarantee the water resources and the local economic layout to adapt, coordinate with the scale of development. Therefore, the construction project water resources demonstration is one of the important means to ensure the optimal allocation of water resources and rational scheduling.Take the Nanzhai Reservoir of Changle County for example, around the local water resources natural endowment and the development use present situation, take with hydration reason, engineering, back water influence and compensation of water resources protection and expansion project of small reservoir of water resources argumentation are described. Analysis of raising reservoir Hennessy water level, increase the utilizable capacity, the impact on local water resources mainly draws the following conclusions:l.The purpose of water resources optimal allocation, rational exploitation, efficient use, pay attention to the principle of protection of water saving, combined with the situation of local social and economic development. Analysis investigation for many years to the actual situation of water supply, water balance analysis of water resources. Analysis results show that the present frequency of 50 water shortage is 20.85 million m3, the water shortage rate was 13.6%. Since the occupation of the agricultural irrigation water is urban life and production water supply situation, crowding out the agriculture irrigation water, most originally designed for agricultural irrigation water is urban and rural production and living water diverted, leading to the rural production water.2. According to BaiLang water river reservoir natural runoff series from 1956 to 2008, using the hydrologic analogy method analysis of natural runoff calculation Nanzhai reservoir, using precipitation data in the process of calculation results for the correction. Through the analysis and calculation, Nanzhai reservoir for many years an average of 2.49 million m after storing runoff deeply, and the latest achievements of runoff depth contour map.3. A long series of reservoir water when the calendar to changes in the economical adjustment calculation, Nanzhai reservoir after the expansion of irrigation capacity will reach 8.2 million m3, and to regulate the basin runoff 2.49 million m3 and annual average 5.24 million m3 of water diversion, to ChangLe 17700 m3 of water supply, urban water supply 6.46 million m3, urban water supply reliability is 90%, for many years the average supply amount is 6.24 million m3.4. Based on regional water conservancy project location, status quo of water supply and water resources, a comprehensive analysis of characteristics of ShanZhuang barrage from Wen river basin GaoYa water transfer, and the method of using high cliffs reservoir main canal water, and the reliability analysis for water. Analysis results show that since its ShanZhuang barrage diversion to Nanzhai reservoir water source is relatively reliable, even if low water year there is water is adjustable, Nanzhai reservoir water supply will can be a powerful guarantee for ChangLe County.5. Expansion after Nanzhai reservoir, the reservoir regulation, water intake to a certain extent can reduce runoff downstream of many reservoirs, the water in the basin of the space-time distribution and hydrological situation will produce certain effect, but because the Nanzhai reservoir itself less runoff, and it can transfer average annual water of 5.24 million m3 from ShanZhuang barrage, so the overall impact is not big. Construction of the reservoir mainly been flood season runoff, decrease the flood drainage; Through regulation, the reservoir in the flood season even without water, can also use the reservoir water, to ensure the downstream river ecological water requirement, is helpful to maintain the downstream river channel ecological dynamic balance.