Research Of Central City Land Use Planning Based On Geological Environment Evaluation

Based on geo-environment in Feicheng central city. Setting out from the factors of topography, the geotechnical character, environmental hydrology geotechnical character, geological hazards and construction to appraise feasibility analysis between city geological environment and urban development. Finally completed Feicheng central city land use planning.The Feicheng basin is karst faulted basin, the main rock is carbonate, clay and elastic. There are clay in upper tertiary system and loose soil in quaternary. In the basin, weathering marlite and gravelly soil is the rock layer. The evolution and ore-bearing property, annealing, structural framework and the part of topography and morphology in the basin is depend on the north west Wenma split. The style of groundwater of basin is karst water, the gulf of mexico andfissure water.The environmental geological issues are groundwater pollution, geological hazards and the engineering geological problem of expansive clay.Based on the studying of the natural geographic and geological environment conditions, the characteristics of disaster environment and resource geological environment of Feicheng central city, the influential factors of geological environment, such as topographic feature, geological tectonic, the properties of rock and soil, the natural resource condition, weather condition, artificial produced geological hazard and adverse effect coming from people's economic and engineering activities. the analysis of the assessment system and model were established with 10 assessment factors such as topographic grade, relative altitude difference,geotechnical engineering division, bearing capacity of foundation soil, groundwater pollution situation, groundwater potential, geological hazard susceptibility, resource abundance, influential degree of human activities and distance from fault. Combination of land use and geological environment, the study area is divided into six first level unit, and basis for this using grid divide study area into 204 secondary units.Through surveys and experiments, forecasting and endowing 204 second level units, using the evaluation model to calculate the second level units of geological environmental quality index, and accordingly to evaluate the quality of geological environment is divided into high, middle, and poor in three districts. There are 101 high quality units, about 8184 km2, account for 54.58 percent of the total evaluation area, there are 67 middle quality units, about 212 km2, account for 26.66 percent of the total evaluation area, there are 36 poor quality units, about 44 km2, account for 18.76 percent of the total evaluation area. Then, the way of implement of geological environment protection were set forth after deeply studying on the sustainable development of Feicheng city from those five aspects:the sustainable use of water resource and environmental protection, the sustainable use of mineral resource and environmental protection, sustainable development of travel resource and the city construction and sustainable development.Finally, analysis of the various types of urban land demand on the geological environment, analysis of the level of fat cells City city center geological environment and land use suitability, the right fertilizer for the city center of city planning, delineation of the size of control downtownboundary, allowing built-up areas, prohibiting construction zone, construction zone and the restricted conditional construction zone.