Abstract
In recent years, ecological progress has been promoted and given high priority by Chinese government. The improvement of urban water environment, as an important part of urban construction, should also be included in the ecological progress. This paper focuses on upgrading the quality of urban water environment in China. The study introduces the requirements of the ecological progress, and analyses the problems of water environment caused by urban development. A large number of research and case studies have been done to explore the paths, models and methods which improves urban water environment from both meso-scope and micro-scope. The analysis shows that urban water environment can be improved through three innovations-theoretical innovation, technological innovation and management mechanism innovation. The meso-scope model of ecological urban water system is proposed as a theoretical innovation. Technological innovations such as hybrid ecological pond, in-situ purification of contaminated water and low carbon treatment for the integrated drainage system have been confirmed to be effective on improving the water quality and environment. As the management and mechanism innovation, clear responsibility division of government, social organization and individuals and new business models are also useful. It is suggested that the innovations in three fields discussed above should be gradually decomposed and implemented at the micro level, so as to develop the path of urban water environment improvement, which suitable for China.
Highlights
In recent years, ecological progress has been promoted and given high priority by Chinese government
(1) Amend urban water environment within the systematic thinking mode. a) The systematic thinking requires the objective and effect-oriented treatment from the perspective of the city, to achieve the goal of “no waterlogging in light rain, no flood in heavy rain, no black odorous water, relieving heat island effect”, which is the concentrated reflection of urban water safety, water environment and water ecology, and reminds us not to take the means as the objectives, or take the measures as the effects. b) The systematic thinking requires the full consideration of all problems, including the sewage processing, rainwater collection of buildings and residential districts and so on
It is suggested that the urban water system planning should be promoted to the overall urban planning level, breaking through the original specialized planning of urban water supply and discharge which was not systematic or not being attached with due importance
Summary
“Ecological improvement vitalizes civilization, and ecological degradation weakens civilization”. Constructed Land of China, there are black and odorous waters in over 70% of 295 cities, and the total amount achieves 1,861 In view of this situation, improvement of urban water environment has surely been on the top agenda of the ecological civilization construction. The improvement of urban water environment, requires the establishment of implementation paths, models and method systems from the meso and micro scope, in order to implement and enrich the theories and practices of ecological civilization construction. The development of urban water systems should follow the green track, by taking the meso-scope theoretical innovations as the breakthrough to implement ecological civilization construction theories in cities and solving the micro-scope problems through the innovation of technologies and management mechanism. Severe non-point source pollution of surface water is another threat to the rainwater runoff
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