Quantitative Research Of The Green System Feature Of Mountain County Town In West Henan

County Towns is different from large and medium cities in space form,urban nature,population size,population density,building density,inhabitants mode and the land structure. As there are considerable differences, we should investigate and analyze according to the green structure layout. This paper take mountain county town-Luanchuan, Songxian Yichuan in the Yi river valley as the research object, integrate urban planning, green space system planning, urban morphology, landscape ecology's principle. One hand, take urban size, shape and nature as the starting point, research the qualitative green structure feature down to the characteristics of the county seat; the other hand, based on qualitative research, to three places in 2007 The spot5 satellite remote sensing as a data source, comprehensive utilization of software, order, information extraction and analysis of green space, by calculating the different characteristic parameters, quantitative analysis to explore structural features green mountain town way. Discusses the structure of mountain town green research methods, especially for the county system characteristic green quantitative research-target, type, scale and structure of green space layout and structure parameters, summed up the mountain through the town green structure of the system proposed Mountain County Green System response., draws the following conclusion:(1) In the similar natural condition, under the city nature premise, the mountainous county smaller the town scale is, higher the city whole forestation cover level is; The mountainous county town's population density is low, the average per person green space target is high as the average per person green space area, the average per person park green space area and so on, but the city overall green space coverage fraction could not achieve generally the corresponding city scale target request, full reasonable use of the environment superiority will become the important method to promote the cities green space overall level;(2) According to the natural condition's limit, in the cities developing process, mountainous county town is received the humanity and the natural dual disturbance. The existent big restriction of land scale and the type choice use causes the green space type to be unitary, to park, sub green as the main type. The green space synthesis service function's promotion should base on the limited green space type.(3) Different from large and medium cities taking small and medium green plaque as the main type, mountainous county town's area and number ratio exist big difference. The plaque less than 100 m2 is the main type in the town's internal space; the plaque bigger the 10000 m2 is the main type along the town's fringe. By green structure's restricting and adjusting to construct close pocket-size park and forest ecology park conforming to the small town's feature;(4) The mountainous county town's green system has the distributing structure feature-along the town's main road, the internal river system, the city and the natural environment and the town fringe.Based on the summary of mountainous county town green space system structure's feature, analyze the development strategies of small town's green system, propose some suggestions such as the green system's construction in different criterion space and different green space reasonable function criterion.