Discussion On Eco City Construction In Yinchuan Based On Urban Ecosystem Evaluation Model

City is the core of modern human social life,With the acceleration of population growth and urbanization,the projects such as the expansion,alteration and new construction of the cities have been increasing.These projects have brought destruction to the environment while satisfying human needs,and the contradiction between man and land has become more and more obvious.Therefore,eco-city construction is imperative.Based on the establishment of the urban ecosystem evaluation model,this article analyzes the characteristics of the natural,economic and social subsystems of Yinchuan urban ecosystem.The impact of the three systems was evaluated from seven aspects: space,energy,solid waste cycle,water resources,biological habitat,public facilities and traffic.The results show that the population carrying capacity of Yinchuan city land resources and water resources is 4.3 million,and the extreme value of transportation vehicles in central city is 1.15 million.In addition,while the local ecosystem analysis also deepen understanding of the ecological environment in the northwest region of China,can provide guidance for other cities with similar conditions to solve ecological problems.The ecological basis of Yinchuan is weak and the urban ecosystem is at the level of basic sustainable development.We need to improve the urban ecosystem from the intensive space,vigorously develop green transportation,protect water resources and water environment,protect biological habitat,develop and utilize new energy and change energy structure,so as to ensure the stability and balance of urban ecosystem.