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Study of the Ecological Water Demand in Main upper Reaches of Yellow River

Author: ChenPengCheng
Tutor: ZhouXiaoDe
School: Xi'an University of Technology
Course: Environmental Engineering
Keywords: The upper reaches of the Yellow River Ecological water demand Water Resources Computing model
CLC: X171.1
Type: Master's thesis
Year: 2008
Downloads: 213
Quote: 2
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Abstract


With the rapid population and economic development, human over-development of water resources in the ecological space, ecosystem balance by severe alteration and destruction of water environment pollution and water shortage is a growing problem, the development and utilization of water resources and ecological environment contradictions sociology. Therefore, the study of ecological water demand and take full account of the carrying capacity of water resources, and to explore water resources suitable for the development of strength and reasonable control of human activities within the allowable range of ecology, resources and environment, this urgent work, this work has been has become the focus of common concern at home and abroad. Ecological water demand of the domestic system of work is still in its infancy, in theory, method and its application in the exploratory stage, the theoretical system and the calculation method is not yet mature. The Yellow River is the largest source of water supply in Northwest China, North China, its limited water resources, accounting for 2% of the national river runoff and water supply tasks bear 15% of the country's arable land, 12% of the population and more than 50 large and medium-sized cities. Currently being vigorously developed cascade hydropower stations on the upper reaches of the Yellow River water resources and development efforts to achieve an unprecedented level poses a severe test for the sustainable development of the ecosystem. In order to ensure the sustainable development of the watershed, the ecological environment and socio-economic coordinated development, it is necessary to study the ecology of the upper reaches of the Yellow River water demand. Of this study focuses on the following: (1) a more comprehensive analysis of the paper introduces the concept of ecological water demand, meaning, classification, research trends, research and ecological water requirement calculation methods, and analyze their applicability and the problems . (2) At home and abroad, ecological water demand calculation method based on the establishment of river ecological water demand computing model. (3) The calculation of ecological water demand in the main stream of the upper reaches of the Yellow River. The upper reaches of the Yellow River water ecological river domestic demand water and river water requirement of two parts. The upper reaches of the Yellow River instream ecological water demand is divided into upper, in three parts, each part of the 25%, 50%, 70%, 95% four hydrological frequency years calculated. Lack riverway only riverside ecosystem water demand roughly estimate. (4) the protection of the ecological environment of the upper reaches of the Yellow River water demand measures, such as scientific and reasonable development of cascade hydropower stations on the upper reaches of the Yellow River, the active implementation of the water diversion project.

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CLC: > Environmental science, safety science > The basic theory for the Environment and Science > Environmental Biology > Ecosystems and pollution ecology > Ecosystems and the ecological environment
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