| The city as a multi-industry integrated vector, in the development process, has gradually formed a associated industrial clusters of sightseeing, vacation leisure, cultural experience, sports fitness, shopping entertainment and so others; meanwhile, it integrated the tourism, entertainment, service, and cultural industry into a leisure industry system.Leisure city is formed gradually by the original tourist city's upgrade process of garden city, forest city and eco-city; it is the market comprehensive industry integration which taking the leading tourism products to meet the foreign visitors and local residents'leisure consumption. The leisure city development plays an very important role in adjusting economic structure, promoting regional economic development, enhancing city taste and people's living level. For tourism development, Changsha city has its own special basic resources of its long and deep historical cultural tradition, and its unique and characteristic mountain, water, continent, and city landscape. The residents in Changsha have maintained the leisure trading. The State Council definitely takes The Chang-Zhu-Tan area to establish "two-type" demonstration area; social circles all advocate establishing ecological civilization concept; the rapid and sound development of tourism is the future target and direction of Changsha, with the goal to create "Central Leisure Capital".Under the background of all circles worldly advocating low-carbon behavior, we comprehensively study and analyse the sustainable development of tourism leisure city by using landscape ecology, ecological footprint theory, sustainable development theory, ecological compensation theory, and low-carbon economy theory and so others. In this paper, used the evaluation system of carrying capacity on tourism environment and improving the ecological footprint, these two methods, to analyse the sustainable development situation of Changsha tourism; and made some related sustainable development measures as per the low-carbon concept.An empirical analysis of Changsha urban, getting the following conclusions:1.Ecological footprint analysisFrom macroscopic view, the carrying capacity of city tourism is not overload; the whole tourism development is in a state of sustainable development; the ecological environment pressure from tourism activity is still under the carrying capacity; tourism ecological environment maintained the better situation; tourism system is still safe enough from a separate analysis of each factor.1) Changsha is a famous historical and cultural city and the excellent tourism cultural city. It has large circle visitors from many provinces. The main foreign visitors are most from long distance province like Beijing, Hebei, Liaoning, Tianjin. Although the tourist amount generally is only about 30%, their ecological footprint accounts for 68.7% of the total, which reflected in the high consumption of air traffic, showing that energy consumption is the main body of eco-tourism traffic consumption.2) Changsha, the famous diet city in our country, is the Hunan cuisine birthplace and exquisite articles gathering place; meat, fish, eggs become food for more than 90% of footprint, therefore, in the future, meat, chili and fish still remain the major consumption goods.3) Significantly improvement of tourism accommodation condition, make per capita accommodation eco-footprint to maintain a steady situation. Star hotels and other facilities may to increase, and the improvement of basic conditions and technical conditions will reduce energy consumption, which will greatly reduce the per capital ecological footprint.4) Travel shopping mainly is Hunan embroidery, bacon and tea with small quantity and little percentage of eco-footprint, because the surrounding areas also have sales.5) Currently, the percentage of tourism ecological footprint is high, accounted for the total 20% around, this because a large number of local visitors to take apart leisure projects, reflected the coming era of leisure age.6) As the difficulty to source the date, impossible to statistic visitors and residents' entertainment behaviors, frequency, etc. So the tourism entertainment occupied a smallî›–roportion.2. Studing carrying capacity in all Changsha area, get the following conclusions:1) The regional differences of carrying capacity are obvious. The maximum value of carrying capacity is above 0.85, the minimum is under 0.34, difference is so greatly between the former and the later. This shows that, in Changsha, it's quite different in tourism resource, economic facility, ecological construction and environmental protection, so need to carry the tourism planning and control tourism diversion as per different capacities.2) The spatial variation is obvious. By the affecting of geographical position, carrying capacity of Changsha tourism reduced significantly from north to south, from west to east, but carrying capacity of economic facility is decreasing from the city center to the surrounding.3) The resources limitation of regional tourism is significant. With the biggest difference between carrying capacity of resource, the top three areas are Furong district, Kaifu district and Yuhua district.4) According to the stay time and behavior of visitors as the main conditions to analyse the carrying capacity of each district, the visitor stay time in Furong and Yuhua district has little impact on whole regional tourism carrying capacity; but like Yueli district, Tianxin district and Kaifu district with rich natural resource, the behavior and stay time of visitor increased the pressure load in regional tourism, growth of tourism amount in future will occur in the overload situation in this area.3.Researching on environment carrying capacity, at the same time, we analysed the city green landscape system as follows:1) The patch fragmentation of Changsha green landscape system is of more serious degree, small patches account for 92%, therefore, the anti-jamming ability is weak, difficult to deal with large travel disasters and emergent situation of natural system.2) From the view of green type, the production and protection green space is too small. This will affect the carrying capacity of tourism infrastructure so much. In the tourism planning, tourism land in future should increase the green area to enhance its carrying capacity.3) From the view of green landscape diversity, patch fragmentation of the whole city is still in serious situation seen from the maximum diversity, evenness, diversity, etc several indicators.4) Overall, the Changsha city's landscape is full of leisure and pleasant style; mountain, water, continent, and city landscape are very favorable for tourism development. Framework of green area and green landscape of whole city has primarily been formed. All these are favorable for both leisure and tourism cities.According to the problems presented in the research process, here get following strategies: 1) Change consumption and behavior patterns, develop tourism under the low-carbon concept.2) Develop tourism industry as per the related policy of "two types" and "urban and rural orchestrating".3) Develop leisure tourism industry, by using circular economy concept.4) Improve the ecological carrying capacity of regional tourism by using environmental and ecological measures.5) Enhance the sustainable development ability of tourism, as per the low-carbon concept.
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