Based On Binary Water Cycle Of River Water Quality And Water Ecological Water Requirement Comprehensive Evaluation

In modern basin in the environment, due to human activity in size and strength, improving the social economic system has quite deep influence on the water resources system and ecological system. In the water, the modern environment of river basins in the past has evolved into the unary natural circulation "nature"-human society of binary circular. In the way of "the atmosphere on slope surface -- -- -- underground river" and "water -- -- -- water drainage water." The exploitation and utilization of water resources in order to ecological water requirement not with greater conflict, make human production, living and ecological environment can get effective protection and healthy development. That will protect the ecological environment, the healthy development of the normal water can be more effectively improve the ability of water resources development and utilization。This paper RongXian territory by three river basin as an example, on the basis of investigation of three river basin, the sources of the survey and evaluation. Through the water, joint evaluation method for three seasons in the dry river basin under the condition of ecological water requirement in the state. And put forward the corresponding pollution prevention measures for the further improvement of water quality, and protection of ecological water requirement in provides scientific basis.The thesis mainly results are as follows:(1) Based on watershed binary water cycle theory, ecological water requirement in the evaluation of water problem, puts forward the comprehensive evaluation model and evaluation of the technical route.(2) Research has identified a basin of ecological water requirement in quantity and quality evaluation standard of appraisal. In this article is based on the amount of water resource development and utilization of international, and the ultimate reference Tennant recommended fish and biological habitat flow percentage and level to set standards for assessment Eae acuity 60%, This is in quality according to certain decontamination diameter ratio below the surface water quality standards stipulated pollutant emissions standards and the ratio of the pen, can we measure or define Caeo bw ". Based on the assumption of COD, and pollution emission standards (1 to 100 mg/L), surface water for classⅢ(20 mg/L), Caeo= Co/C2o= 20/100= 1/5. Article 1= bw set for evaluation standard.(3) Adopt empirical research on the river basin, RongXian shaxi river basin, and the river water twilight of ecological water requirement with the quality evaluation, the river basin, and the waters of the river, jerry, ecological water requirement of shaxi river ecological water requirement of evaluation standards.(4) The river basin are proposed to improve the water with jerry river ecological water requirement of the quantity and quality of the solution. Through improving the utilization efficiency of water resources, water reuse, sewage treatment YongLv back and control of the pollutants can make two river ecological water problem solved.