| With the continuous acceleration of the process of modernization of cities,the rapid population growth and the continuous expansion of urban gray space,the ecological environment has also been severely damaged.However,the progress of social civilization has prompted people to have higher yearnings and requirements for a good green human settlement environment.Building an ecological city with a reasonable ecological structure and efficient ecological service functions has become a global development boom.The construction of the forest city is the key to achieving an ecological city.It plays an irreplaceable role in improving the natural conditions of the city,improving the environmental quality,optimizing the ecological pattern,and coordinating the development of urban and rural areas.Since 2004,the National Afforestation Committee and the State Forestry Administration have initiated the evaluation procedure of "National Forest City".More and more cities are actively participating in the construction of forest cities.This article takes the forest city construction of Dingcheng District,Changde City,Hunan Province as the main research object,and takes the creation of a provincial forest city as the background,and investigates the location conditions,natural conditions and resource overview,ecological environment,and socio-economic development of Dingcheng District.Analyze the current situation of urban construction and summarize the potential of its forest city construction;compare the requirements of provincial evaluation indicators to obtain hard indicators for successful forest creation;take forest ecology,urban planning,system engineering,sustainable development and other theories as references,in On the basis of previous studies,and based on the existing Hunan Provincial local standard "Forest City Evaluation Index"(DB43/T1315-2017),the 5 major systems and 28 index contents have formed a forest city evaluation index system model in Dingcheng District,Changde City,Hunan Province.And using Analytic Hierarchy Process(AHP)and fuzzy comprehensive evaluation method to calculate the weights of various indicators and comprehensive evaluation scores,analy ze and summarize the key indicators that affect the construction of the forest city in Dingcheng,and determine them according to the hard and key indicators The construction of key projects is used to carry out the overall planning of the forest city.The specific research results are as follows:(1)Based on the research of forest city theory,this paper has a deep understanding of the research progress at home and abroad,based on the actual situation of the city construction in the study area,analyzes its construction potential in the construction of forest city,including the urban forest coverage rate to be improved,urban green space system There are five aspects that need to be improved,the forest network is not connected enough,the tree species structure is single and lacks levels,the characteristic forestry industry needs to be improved,and the ecotourism and ecological culture need to be developed.(2)By comparing the index requirements in the local standard "Forest City Evaluation Index"(DB43/T1315-2017)in Hunan Province and combining the actual conditions of Dingcheng District,it is concluded that out of 28 indexes for forest city construction,11 have met the index requirements,10 Three indicators have yet to be built,and seven have yet to meet the standards.These 7 indicators are also hard indicators for the success of Dingcheng District,namely:urban forest coverage,urban green coverage,recreational green space construction,village greening,forest protection,biodiversity protection,and ecological leisure tourism.(3)According to the existing index system,the forest city index system model of Dingcheng District,Changde City,Hunan Province is formed,the weight of each index is calculated by the analytic hierarchy process(AHP),and the consistency of the calculation results is checked.The system level index weights Urban Forest Network B1>Urban Forest Health B2>Urban Forestry Economy B3>Urban Ecological Culture B4>Urban Forest Management B5,and the weight values are:0.3801,0.2881,0.1712,0.1041,0.0565,among which the Urban Forest Network Indicators are the most important,followed by urban forest health indicators.A total of 7 of the 28 index levels have a weight value of more than 0.05,which is a key index that affects the construction of the forest city in Dingcheng District.The descending order is as follows:city forest coverage(0.1054),forest production base(0.1052),biodiversity protection(0.0991),afforestation area(0.0933),tree species configuration(0.0843),forest protection(0.0569),town Green coverage rate(0.0521),of which the urban forest coverage rate and the importance of forest production bases are the most prominent.The fuzzy comprehensive evaluation method is used to comprehensively evaluate the forest city evaluation index system in Dingcheng District,Changde City,Hunan Province,and the overall comprehensive evaluation score is VB=3.8410,and the evaluation result is "the foundation for forest city construction is good",that is,Changde,Hunan Province The construction foundation of the forest city in Dingcheng District is good and it is in a good state of development.In the system level,the evaluation result of urban forest management is the best,which belongs to level I,and the other four evaluation results belong to level II.Sort the indicators according to the scoring results,from high to low,urban forest management VB5=4.1840,urban ecological culture VB4=3.8860,urban forest network VB1=3.8730,urban forestry economy VB3=3.8470,and urban forest health VB2=3.7090.(4)Dingcheng District should make key planning in two aspects:urban forest network and urban forest health,especially the construction of urban forest network is the most important.In the urban forest network,the weight value of the urban forest coverage rate is the largest,and the construction urgency is stronger,and the forest coverage rate of Dingcheng District has not yet reached the standard.In the follow-up planning,the construction of ecological corridors should be actively carried out to strengthen the road forest network and water system forest.The construction of nets and farmland forest nets enhances the connectivity between the networks,thereby promoting biodiversity.At the same time,mountain afforestation and vegetation restoration are also the direction of efforts.(5)The forest city planning in this paper is closely linked to the evaluation index system,combined with rigid and key indicators to determine the key construction content.Guided by the concept of point,line,and area layout,build a forest city master plan of "one heart,two cores,two screens,three networks,and one hundred villages and one thousand points",and implement the forest ecological system,forestry industry system,ecological cultural system,and management security system The special planning and construction of the forest city in four aspects are expected to provide an important reference basis for the development and construction of the forest city in Dingcheng District. |
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