| Rural planning is an important way to control scale and distribution of rural residential area, especially at mountainous area with high potential of hazards. Efficient Planning can, on one hand optimize suburban land use, and on the other reduce the threats of geological hazard and in turn substantially protecting life and property of villager. Xiang'e village suffered from serious damage in the 5.12 earthquake with its 95% of constructions destroyed. On the basis of extraction and analysis of data of the study area, according to geological hazard, the study area was regionalized by Using the Logistic model; An evaluation system was built for the rural residential area land-use of xiang'e; Using Multi-Criteria rules of Cellular Automaton simulate evolution of the residential area land-use under the original Planning; Finally, a new rural residential area land-use Planning route was propounded. The main results were as follows.1. Using 3S technique to get geological, ecological, social background information. On the basis of TM data preprocessing, the information about formation lithology, Geological Structure, Coverage of Vegetation of xiang'e village was extracted by RS, GIS technique; According to DEM, the topography, hydrological data was collected by GIS technique; With the help of GPS, the geographic position information of medical, education infrastructure and geologic hazards point was collected in the field.2. The spatial characteristic of geological hazards and the potential causes was analyzed. The datasets of correlations among geological hazard and causal factors is grid based, with the help of Logistic Model, the potential of hazard based upon different combination of causal factors were discussed, the potential threats were categorized, according to the analysis, into None-, Low-, Medium-High-and High-Potential zones.3. An evaluation system was built based upon, among others including socio-economical criteria, potential ecological hazard zones for Rural Settlements site selection. According to the result of suitability evaluation, the study area was categorized into Highly-Suitable, Suitable, Sub-Suitable, and Not-Suitable.4. The distribution and evolution of xiang'e under original land-use Planning The spatial changes of landscape pattern of the rural residential area during 1996 and 2006 were analyzed by GIS, PR and SI technology. The research suggested that the residential area were mainly located at lower altitudes, river and road near area. Because the original planning provided the insufficient geological hazard protection, 45% rural residential area was located in region which was threatened by earthquake and 60% was located in geological disasters zones.5. The spatial simulation of rural residential area by CA-Markov model. The model, was conducted based upon the data from year 1996 to 2006, by comparing the hazard and suitability data between 2006 and 2011, under the strategy of aggregation settlements, the rural settlements decreased by 844239.18 square meters. According to the results of the hazard and suitability evaluation, the planning effectively reduced the potential hazard threats while enhanced residential suitability.6. The original and the after-earthquake plannings were compared at the effect, technical route, hazard threat and residential suitability et al. From this study results, a new route for rural residential area planning was conclued:Background data collection by 3S techniqueâ†'Characteristic database establishmentâ†'Geological disaster zone divisionâ†'Suitability evaluation system for rural planning against geological hazardsâ†'Preliminary planningâ†'Simulation the evolution of land-use under the preliminary planningâ†'Final planning. |
PDF Full Text Request