Urban planning is the goal and plan of urban development in a certain period, the comprehensive department of urban construction and the management basis of urban construction, which is closely related to many disciplines. In recent years, due to the fact that environmental protection planning has not been implemented simultaneously with urban planning and urban construction, the urban environment has been damaged to a certain extent, and environmental pollution has become increasingly serious, so the urban environment cannot enter the track of benign development. Therefore, people should pay attention to environmental protection planning in urban planning. 1. Environmental problems in the process of urban development A city is the product of the development of human social civilization in a certain historical period. Its emergence and development are determined by economic development and influenced by superstructure. In recent decades, the rapid growth of urban population and rapid economic development have caused a series of environmental problems: 1. The problem of water pollution is outstanding. Due to the rapid growth of urban population and the rapid development of industry, a large amount of sewage is directly discharged into water without proper treatment, resulting in water. Recently, water pollution in China has been increasing. More than 850 rivers with monitoring data 1200 in China are polluted. Among the seven major water systems, the Liaohe, Haihe and Huaihe rivers are seriously polluted. 1, among 38 urban river sections, 1, 33 river sections are polluted to varying degrees. Across the country, 78% of the river reaches are not suitable for drinking water sources, 50% of the groundwater is polluted, and many cities such as Xi and Beijing have also experienced water supply crises. It is estimated that the economic losses caused by pollution in China reach 40 billion yuan every year. 2. Urban air quality has deteriorated seriously. The rapid development of industry and transportation and the extensive use of fossil fuels have discharged dust, sulfur oxides, nitrogen oxides, carbon oxides, ozone and other substances into the atmosphere, which has seriously deteriorated air quality. China's air pollution belongs to "soot pollution", and the total suspended particulate matter concentration in urban air in China generally exceeds the standard, with an average concentration of 309 μ g/m3; The concentration of sulfur dioxide is relatively high, and pollution in some cities is quite serious, with an average of 83 μ g/m3 in northern cities. Benxi, China, was once called "a city invisible to satellites" because of smog. However, excessive sulfides and nitrogen oxides in the atmosphere have caused acid rain in most parts of the country. The frequency of acid rain in Yibin, Changsha and other cities exceeds 90%, and the average PH value of rainfall in Changsha reaches 3.54. The arrival of acid rain not only destroyed the ecological environment, but also aggravated the corrosion and damage of buildings, railways and bridges, bringing huge losses to industry and agriculture. The greenhouse effect and ozone layer destruction caused by air pollution directly threaten human survival. 3. Solid waste is rampant, and the phenomenon of garbage siege is serious. Human life and production produce a lot of solid waste. At present, China produces 660 million tons of industrial solid waste every year, including 30-40 million tons of hazardous waste, with a cumulative amount of more than 6.4 billion tons, occupying more than 500 million square meters of land; The annual output of domestic garbage is 1 ton, increasing at the rate of 7-8% every year. Due to the open-air accumulation of solid waste in China, two-thirds of the cities in China are surrounded by garbage. Stacking solid waste everywhere not only hinders the view, occupies land and spreads diseases, but also seriously pollutes the environment and intensifies the pollution of water bodies and atmospheric soil. 4. Noise disturbing people is common. At present, with the rapid development of industry, transportation, culture and entertainment in China's cities, the phenomenon of noise disturbing people is becoming more and more prominent. According to the monitoring of 44 state-controlled cities, more than two-thirds of urban residents in China live in an environment with excessive noise, and the equivalent sound level of regional environmental noise is distributed in 5 1.5-65.8D B(A), including Luoyang, Datong, Kaifeng and Haikou. The equivalent sound level of road traffic noise ranges from 68.0 to 76.3 dB (A). Second, urban environmental protection planning and its main contents are based on the above-mentioned environmental crisis. In recent decades, people have gradually realized the relationship between urban planning and urban development, and began to use scientific planning to guide urban construction. The proposal of urban planning overcomes the disorder, blindness and randomness of urban development in the past, and provides technical and legal guarantee for the healthy development of the city. Urban environmental protection planning is an important part of urban planning. It is a planning system based on the investigation and analysis of the nature, scale and development direction of the city and the present situation of urban environmental quality in the overall urban planning, with the goal of protecting human living environment, reducing pollution and saving resources. According to the general policy and strategy that China's environmental protection should adhere to the simultaneous planning, implementation and development of economic construction, urban and rural construction and environmental construction, and realize the coordination and unification of economic benefits, social benefits and environmental benefits, urban environmental protection planning should mainly carry out the following work: 1 The preliminary work of urban environmental protection planning is the basis of urban environmental protection planning, including urban natural environment information, such as geographical location and ecological environment. Social and economic conditions of the city, such as population and gross national product; Investigation and analysis of monitoring data of atmosphere, water body and noise, sources and accumulated amount of solid waste over the years, pollution control and other environmental conditions; Present situation analysis and functional zoning of urban ecological environment. 2. Comprehensive air pollution control planning is to divide the functions according to the present situation and development trend of urban air quality, and calculate the maximum allowable emissions and reductions of each functional area according to the proposed environmental objectives, so as to formulate pollution control planning. To control air pollution, we should determine the primary pollutants according to the energy structure and traffic conditions of the city, that is, pollutants with high concentration, wide range and great harm, so as to control them in a targeted manner and prescribe the right medicine. At present, air pollution in most cities in China is mainly caused by coal burning and automobile exhaust, and the primary pollutants are sulfur dioxide and total suspended particulate matter. Therefore, the long-term goal of the planning should be to improve the backward olefin coal mode, improve the combustion efficiency, try to use gas fuel, briquette, solar energy, geothermal energy and other pollution-free or less polluting energy sources, implement regional central heating, eliminate small chimneys of thousands of households, improve the road hardening rate, and create a smoke-free control area by strengthening pollution control and improving pollution control technology. Adjust the industrial layout and make scientific and convenient use of atmospheric environmental capacity according to the law of atmospheric self-purification; Strengthen pollution source control and reduce pollutant discharge; Reduce automobile exhaust pollution through technical and administrative means; Improve the urban greening rate, select tree species with good pollution resistance, and vigorously develop plant purification. 3. Comprehensive water pollution control planning Comprehensive water pollution control planning is to calculate the maximum allowable discharge and determine the best control scheme based on the investigation and analysis of the current situation of water pollution and the environmental capacity of the receiving water body. At present, the degree of water pollution in seven major water systems in China is increasing and the scope is expanding. 1996 The polluted water of the Yangtze River, the Yellow River, the Huaihe River and the Songhua River 1996, the national industrial wastewater discharge was 50.29 billion tons, including 7.04 million tons of chemical oxygen demand, 2,457 tons of heavy metal1565,438 tons, cyanide and tens of thousands of tons of pollutants such as arsenic, phenol and oil. Domestic sewage accounts for about 24% of the total annual discharge, and the main pollutant is organic matter. According to the specific situation of water pollution in China, the comprehensive water pollution control plan should reform the backward production mode, adopt the technology of less waste and no waste, realize clean production, improve the sewage treatment effect and resource utilization rate, reduce sewage discharge, build effective sewage treatment facilities, strengthen the treatment of industrial wastewater and domestic sewage, and finally achieve the goal of effectively protecting water resources. 4. Urban solid waste comprehensive management planning The comprehensive management planning of solid waste is to implement the comprehensive utilization rate, treatment and disposal index system of all kinds of solid waste according to environmental objectives, and formulate the final treatment countermeasures. At present, many cities in China are surrounded by solid waste, so it is urgent to solve the problem of solid waste. 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