Research On The Delineation Of Yunxian Basic Farmland And Spatial Layout Optimization

Agriculture is the foundation of the national economy, arable land is the foundation of agriculture, and basic farmland is in the best of arable land, is an important basis for food production, so the protection of basic farmland is the most important task of the protection of farmland, which is important to ensure food security, maintaining social stability and promote comprehensive and coordinated economic and social development to achieve sustainable economic and social development.This study is based on the status of land characteristics, land use demand and the analysis of reduced volume of Yun country, combined with the land and basic farmland protection indicators ShiYan City given to Yun country, and ultimately determines the number of basic farmland protection. Besides, in accordance with the characteristics of arable land in Yun country to determine selection principle of arable land selected to basic farmland, combined with the principle of the division of basic farmland, referenced to related information, establish the index system of selecting basic farmland from arable land of Yun country. The evaluation index system include the target layer, constraining layer and indicator layer, which nine specific evaluation index is selected to reflect:the impact of disaster damage, water sources of radiation, transport and village location, the town of radiation, and then establish evaluation index system of the selection of basic farmland from arable land.Then the specific value of each indicator is obtained based on GIS-based data analysis module; use Delph to evaluate the quality of arable land and to determine the weight factors of the indicators. The combination of these two methods, which can the use to the full of the GIS overlay analysis and buffer analysis, spatial analysis function and the ability to deal with attribute data, can effectively and objectively reflect the real extent of the quality of arable land. Thus the grading and classification can be more scientific and objective. And then a comprehensive evaluation of coefficient method is used to sort all arable land of Yun country, combined with basic farmland on the delineation content of "Regulations on the Protection of Basic Farmland" and quality of arable land of Yun country, construction land-use planning, layout and utilization of basic farmland, to determine the finalizing spatial distribution, and to achieve spatial distribution of basic farmland of Yun country.Then need to bring up and transferred to the basic farmland is determined according to the requirements, make space layout adjustment optimization scheme of Yun country basic farmland, and one by one block to implement. Analysis of quantity, type, grade, location of adjustment and change of basic farmland. Finally, on cultivated land and basic farmland protection strategies and measures.