Water Allocation Of Hutubi River Basin Based On Swat Model

In the rapid development of industry and agriculture, accelerate the process of urbanization, under the background of increasing the demand for water resources,water resources allocation to promote the virtuous circle of water resources utilization,optimizing water resources allocation pattern, the pursuit of "harmony between human and water" to protect the economic and social sustainable development and the protection of the ecological environment has important significance. Since 2012, our country began to implement the most strict water resources management system, and the rational allocation of water resources in the basin is also the meaning of the title.Based on the summary of foreign runoff simulation and water resources allocation and other aspects of the domestic research results, taking Hutubi River Basin as the research object, construct the database SWAT model of the study area,and using the model of runoff in Hutubi River Basin were simulated; at the same time using a water balance method between the rate of the water supply industry,agriculture, and life and ecological aspects of the water balance is analyzed to ensure the runoff in Hutubi River Basin; Basin water resources allocation are discussed.Finally, in total control requirements, given the Hutubi River Basin in average years and wet years and dry years the unit configuration scheme. The main results of this study are as follows:(1) The SWAT model of Hutubi River Basin was constructed, and the runoff of Hutubi River Basin was simulated by the model. The Hutubi river basin is divided into 37 sub basins and 425 hydrological response units, and the elevation zone is divided by the model, which fully considers the influence of elevation on meteorological factors. 2008-2009 model was selected as the model rate at regular intervals, 2010-2011 years for the model validation period, take the correlation coefficient R, NS of Nash efficiency coefficient and relative deviation RE three indicators to assessment of simulation results. The results show that, value simulationresults and value of the Nash efficiency coefficient are 0.77 and 0.90,satisfactory result showed SWAT Model in Hutubi River Basin has good applicability.(2) The present situation of the basin water resources and water demand were analyzed respectively. Confirmed the basin of water supply under the variation of runoff in the guarantee rate; and calculated the agricultural water demand, industrial water demand, domestic water and ecological water demand in Hutubi River Basin,the total water demand of about 679 million m3; finally, under the variation of runoff in the guarantee rate of water supply and demand balance were analyzed, results show that, status in Hutubi River Basin water supply and demand in equilibrium.(3) Use average annual water quantity method, ecological base flow method and the quota method to calculate the watershed limit the total amount of water respectively, and ultimately determine the watershed limit the total amount of water use as 4.79 billion m3 / a, county directly under the unit limits the amount of water to4.04 billion m3/ a, and gives the limit under different guarantee rates in water; and determine the Hutubi River Basin industries water quota standards. In 2011, for the current year, follow the total control, quota management, based on the principle of water first, then surface water, after the of groundwater, respectively research in Hutubi County units of agricultural water demand, animal husbandry to need water,industrial water, domestic water and ecological water requirement, in the case of multiple water sources(groundwater and surface water) for the configuration. And the Hutubi River Basin in average years, wet year and dry year of each unit of water allocation scheme are given.