| Along with the promulgation and implementation of<Urban and Rural Planning Law>, the research of regional green space is becoming an important part in building up an integral green space of urban and suburban. Along these years, the theories researching on green space system are becoming diverse, so this subject-specific development requires the research on new theories and methods. This paper chose the city of Enshi which is an evident mountainous region as the research object to work out the green space system within the city area, and then raised the suggestion of optimizing green space system through the suitability analysis assessment, so as to provide a more scientific method to the research on regional green area system by introducing 3S technology.Firstly, this paper discusses the classification on green space of county, aiming at the characteristics and contents of county level green space, the classification of county level green space was discussed by two layers of compact residential and incompact residential. Then pointing at the research on county level green space, the green space of county are divided into three parts which are county, planning areas, towns and villiages. For the county, those individual factors like elevation, slope, exposure, soil, road, water body and land use were selected. Depending on the distribution map of sensitivity, the construction guidelines and suggestions of different kinds of green space in county level incompact residential can be realized, including recreational green space, grave site, productive green space, buffer green, and restoration green space. Based on the green space system of Enshi planning district, water body, road, historical interests'distribution, pollution resources'distribution, slope, elevation, soil and land use were chosen. Through the suitability analysis of green space, the suitability degrees'distribution map of Enshi planning district green space was worked out. Integrating with urban planning, the distribution of the green space in Enshi can be proposed, and then this paper gave the suggestion of improving the construction of different kinds of green space within the city. Aiming at the research on the towns and villages belonging to Enshi, the ecological suitability analysis was preceded, taking Tunbao Town and Gunlongba Village as examples. Based on the distribution map of ecological sensitivity levels, the construction zones and protection zones were defined. Integrating the existing conditions, the construction and improvement suggestion of the green space systems of these two objects are advanced, from the 5 layers of dot, line, area, region and ring. |
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