The Research On Suitability Assessment Of Construction Land In Hang Zhou

The study of construction land suitability assessment in urban areas was almost based on geographic conditions or engineering geological conditions. But the comprehensive study is relatively little. This paper relies on the geological survey project of Hangzhou city; it supplied enough information, the limitations of the paper are very small. Research breakthroughs in the construction site suitability evaluation of traditional content, change the traditional mode of thinking, attach great importance to the construction site suitability assessment, a comprehensive study of evaluation factors, to establish a scientific evaluation system. According on the geological factors and elements of the socio-economic, respectively analysis the landscape suitability assessment. Landscape suitability assessment, ecological suitability assessment, demand theory, and other relevant theory connect with planning studies, to establish the corresponding suitability evaluation system and then grade the construction land. Key elements include:First, inherit the traditional concept of research, integration of varieties of theories, evaluate construction land suitability. According on the demand theory of Maslow connects with landscape and ecological, based on the socio-economic factors assesses construction land suitability.Second, according on the comprehensive study on evaluation factors, establish a scientific evaluation system.The factors that impact on the suitability of land for building are varieties on space and time. Geological elements have been directly quantifiable attribute characteristics of the geographical space, socio-economic factor is the geographical space as the background, from quantitative to qualitative transformation and analysis, Therefore, in construction land suitability assessment is divided into construction land in the geological suitability assessment and suitability of land for building social and economic evaluation, were the establishment of the corresponding construction land suitability evaluation factor system.Third, elements of spatial analysis and establish the corresponding property database.The technology platform is MAPGIS, spatial analysis in the study, attributes to the database is based on the analysis of the elements of space, building sites to establish the role of the factors affecting the property.Forth, variety of evaluation methods result, the comprehensive evaluation of results, and optimize the evaluation results.From a macro point of view, the construction sites of geological elements of the construction land development and utilization of restrictive, through the construction sites of geological suitability of land for building socio-economic assessment and appropriate evaluation of the results of the integrated treatment, the results are different ways of optimizing the establishment of the Construction land suitability evaluation results.Research breakthroughs in the evaluation of the traditional concept of land for building works on geological conditions or socio-economic conditions for a single aspect of the evaluation, giving full consideration to a combination of both, urban construction land suitability evaluation of the results is reflected not only the differences of socio-economic conditions, but Geological conditions of the difference. Research is not limited to the conventional method used alone, and the applicability to different methods, particularly in the application of neural network has done study more deeply.According on the evaluation of land suitable for construction of grading results show that Hangzhou to do high-intensity development of urban construction land area of about 585.54 km2, the total area of about 19.468 percent, under the guidance of the appropriate development and utilization of the land area of 1149.34 km2, accounting for 38.2 percent of the total area, rather than as a construction site of the land area of 614.15 km2, or about the total area of the city domain of 20.41 percent, land-use types in another 21.93 percent of the land not be suitable for the development of urban construction, a total area of 659.80 km2. Based on the above results, optimizing the whole region into planning the building, appropriately built-up areas, restricted areas and the building should not be built-up areas and proposed land use district development prospects.