Farming Suitability Appraisal And Supply And Demand Potential Analysis In Luding Based On GIS

According to the Luding county's farming use present situation, the utilization geographic information system and the remote sensing technique, makes the classification and grading appraisal to the farming suitability. In order to implement the Central Party Committee,the State Council about the farming and the basic farmland protection significant decision request, guaranteed that the Luding county the food security,is coordinated each kind of land demand,must to the county-wide farming quantity,the quality,the regional distribution and the protective measures and so on conducts the deep research,appraises the county-wide farming scientifically the productive potential and the cultivated land supply and demand balanced condition,the reasonable determination county-wide farming's protection scale and the regional distribution,propose the effective farming use and the protective measures.Uses the remote sensing data to take the farming information the gain method, the geographic information system takes the spatial data management and the analysis method, the analytic hierarchy process and determines its weight as the selection appraisal factor the method. Through optimal comes out,to be able to represent the Luding county farming quality of material the appraisal factor,establishes the Luding county farming suitability appraisal guide posts system and the weight graduation. Through builds the Luding county 30mDEM, from the DEM extraction appraisal factor's terrain target, makes the corresponding terrain analysis,produces the Luding county the elevation graduation chart, the slope graduation chart,the slope to the graduation chart, the mountain massif shadow photograph and the three dimensional equivalent body chart. Unifies the Luding county the farming nutrient,the water source and so on actual situation, the elevation graduation chart,the slope graduation chart,the slope makes the superposition analysis to the graduation chart and the mountain massif shadow photograph,produces the Luding county the farming suitability rank chart,and makes the quality synthetic evaluation based on this chart to the Luding county farming suitability.Takes the basis by the Luding county farming suitability measure results, analyzes the farming through the farming natural productivity and the economic production potential the productive potential,takes back from agriculture the standard according to the ecology to analyze takes back from agriculture the reduced farming, forecasts the farming and the basic farmland demand from the forecast basic farmland area and the cultivated land inventory. Has must then have supplies.Through the analysis reserve land resource's development use potential,the farmland resources' development use potential,the pastures development potential and the countryside residential area reorganization potential,obtains the farming supplies potential.The farming occupies makes up balanced is the economical fast development and the farming protection best unification.Through analyzes the Luding county the farming to occupy makes up balanced,looking from the data which obtains,the farming protection has heavy responsibilities.Land suitability evaluation based on the results of its supply and demand forecasts,the phase of the proposed countermeasures and suggestions should be to Luding County for the conservation and sustainable use of land to provide basis for decision making.