under the guidance of the ecological concept in the new era, the management of urban water environment in china has gradually formed eight new ideas, which embody the general direction of people-oriented, ecological priority, joint protection and fundamental change. 1) space management and control, three-line and one-land spatial control has become the top-level thinking across all sectors and local government boundaries. any activity carried out in the land and space must first determine the use and protection functions to ensure the safety of the ecological function space; first determine the borders of towns and farmlands, develop the boundaries of activities to ensure that the ecological red line is not encroached on; first determine the current quality bottom line to ensure that the environmental quality is not reduced; and first determine the water, soil and mineral resources are beneficial. all kinds of development activities should comply with the requirements of pollution prevention system established by the ecological environment departments, implement the negative list of backward industries, and establish an unreasonable withdrawal mechanism of social and economic activities through strict access. 2) peak ocean, basin circulation of any town, is from the top of the mountain to the ocean watershed components, the establishment of watershed water cycle dominate the urban water environment of the large system thinking. residential construction, water conservancy and environmental protection departments jointly implement the principle of "water conservation first, space balance, two-handed efforts, and systematic management". all development activities should be observed: make full use of blue water (i.e. precipitation in the sky), and truly reduce green water (i.e. soil evaporation, botanical water). on the premise of overall utilization of blue and green water, we should get rid of the restriction of traditional engineering thinking in urban construction and water conservancy projects, pay attention to the close combination of sponge city construction and water cycle in river basin, give priority to drainage pipe network, and put an end to one-size-fits-all by combining closely with the characteristics of local rain and pollution and the basis of current pipe network. zonal characteristics, on-demand decision-making; governance of urban black and odorous water, do not forget to grasp from the causes of black and odorous, "running water is not corrupt" ancient training aids the design of black and odorous control engineering. at the same time, ecological space management and environmental quality constraints should be implemented. 3) the black and green are two colors. in the era of green development, we must maintain a clear hatred for the black and green productive forces. because in order to improve the quality of life of the people as the development goal of the new ecological concept, resolutely eliminate the black productive forces. the existing measures are: to rely on pollutant discharge standards to ensure elimination and shut down the line; to constantly raise the lower limit of emission standards under technically and economically feasible conditions, and to effectively control the total amount of pollutant emissions throughout the country; to rely on the "three generations integration" of life, production and ecology to develop green productive forces and achieve "three generations win-win". 4) river and lake are the two major changes in the management of water environment in cities and towns. this requires that people of different functions and professions should obey the decision of the river and lake: the river and lake should set goals and targets, and guide the fine management of water environment; the person in charge of the town should obey the general plan of the river and lake, according to local conditions, according to different water, highlighting the environmental quality standards; the town should divide the river and lake equally to establish the carrying capacity of resources. early warning and control system, lifelong accountability, to eliminate the use of engineering instead of environmental protection, to strengthen the top-level design of urban water control, to change the administrative order of pollution control, black removal, standard control mode, replaced by environmental quality as the core, environmental standards as the acceptance index of the control unit classification, hierarchical management mode. 5) livable cities and towns with ecological priority are the highest realm of urban construction in the era of green development. because people gather in cities and towns, work together, the common pursuit is people-oriented, to ensure livable. as all human activities are inseparable from the water cycle, it is necessary to improve the quality of life of people, logistics, energy flow, information flow and traffic flow. on the premise of fully and reasonably improving the recycling utilization of water resources, we should give priority to ecology and build a community of life of mountains, forests, lakes and grasses. this goal should become everything. the main line of water control activities is to provide evidence for "green hills, green water, and jinshan yinshan". we must firmly abandon the simple surface treatment actions of digging sediment, clean black water, controlling soil and transporting garbage without ecological objectives and livable concepts. to assess the above-mentioned work programs of digging, cleaning, harnessing and transporting, such as digging sediment, we must first examine the contribution rate of the bottom cement to the quality indicators, and then examine the disposal plan of the dredged sediment. through two steps only by checking can we move the project. 6) toilet revolution, from source to tiancheng rural sewage sewage pollution is the toilet. the three changes of the toilet revolution: humanization, harmlessness and resource-based are the keys to thoroughly solve the urban sewage pollution. by opening the door of the green circulation of nutrients in urban and rural areas, the urban people can enjoy the agricultural ecological civilization before the invention of the toilet. that is to say, 90% nitrogen and 70% phosphorus brought by feces and urine in sewage will be turned into treasures: nitrogen and phosphorus pollution sources in cities and towns will be turned into farmland nutrient sources, feeding back safe food and drinking water in cities and towns; new models of collection, transportation, disposal and utilization of black and yellow ash water will lead to urban drainage revolution; rainwater and sewage diversion and black ash diversion will bring about no water environment in cities and towns. new prospects of pollution, resources and energy. 7) harmony is the key to water control in cities and towns. residential construction, water conservancy and environmental protection have their own emphasis and specialties. forming a joint force is the key. acting separately and investing separately has been proved by many years of practice. therefore, harmonious coexistence and the formation of resultant force are new tests: urban water control requires ecological flow first, water is required to the resource allocation department according to the protection objectives and needs; urban water control requirements evaluation
