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. The control of air pollution should be based on the urban energy structure and traffic conditions.

Leng Yue replied on August 20th, please accept it.