Study On The Designation Of Permanent Basic Farmland Based On GIS

The protection of arable land resources is universally concerned by the international community. China’s arable land accounts for about7percent of the world’s arable land area. Although China has a large number of total arable land area, but average per capita area is relatively small, only a quarter of the world’s. The distribution is uneven, more than90percent of the country’s arable land is concentrate in Chinese southeast humid and semi-humid monsoon region, and superior arable land is also extremely rare. In order to solve the farmland problem and people’s rations, according to the central aythority’s relevant provisions, that the underscore of arable land is1.8billion Mu, and the arable land resources to be strictly protected in the parted permanent basic farmland protection zones.Another safeguard of the national food security is made the good quality, location convenient, contiguous high farmland as basic farmland. Exactly the second national land survey has provided an inpeccable layout and quantity on basic farmland; and for a new round of land use planning, good coordination of the demand for arable land and basic farmland construction and development is another requirement of the basic farmland layout. In order to make the dynamic monitoring and management of basic farmland easier, so use GIS to designate basic farmland and establish basic farmland database is extremely important.This research takes the Chongqing city Fuling Tongle as an exemple. Using administrative levels analyse, multi-factor weighted analysis and spatial analysis based on GIS to study the basic farmland delimitation, layout and the establishment of basic farmland database. The main research contents are as follows:(1)Studying the significance of delineate the basic farmland and the theory of basic farmland’s spatial layout; to discuss the basic farmland evaluation, optimization layout, basic farmland trends and transferred to transfer theory; the thought of the the factors of basic farmland repartition and distribution. On this basis present the thinking of reasonable delimit basic farmland and optimize the layout.(2) The basic farmland database standard and basic farmland technical regulations shuold combine with the second national land survey of Basic Farmland Investigation Technical Regulations, technical report of agricultural land and land to use overall planning to establish permanent basic farmland database.(3) According to the requirements, to fulfil the basic farm protection graph with the protection patch of basic farmland, to attribute information given on the map, and put the data of who in charge of protection the basic farmland and the responsibility book they signed in storage.(4)To analysis the cultivated land and basic farmland change situation:using the newest second investigation data and remote sensing data to analysis the land distribution which is extracted from TM imagese. According to the overall land use planning, study the driving forces on cultivated land change, determine the significant impact factors. And analysis the situation of farmland which may be occupied in the future. Analysis the characteristics of existing farmland resource data, and from this point do some thorough researches on standardization, standardization of arable land resources spatial data.(5)Establish the index system, weigh the coefficient of evaluation indicators, using the GIS software to evaluate results, build the spatial data model, calculate the cultivated land suitability of basic farmland’s comprehensive index, analysis results, introducing the constraint factors of basic farmland quantity protection, delimit basic farmland, then determine the basic farmland protection area.Take Tongle village of Chongqing Fuling as an example to delimitate the permanent basic farmland. In accordance with the" basic farmland database standard" and practical requirement to establish permanent basic farmland database.This study is an applied research according to optimal quality, the most reasonable layout of cultivated land as basic farmland for the primary purpose. Setting up a scientific and effective system to selected basic farmland. And it has some positive significance for the optimal basic farmland databases’establishment and protection of the application. Research for the promotion of basic farm and construction project concordent layout, strengthen the scientific decision-making of arable land and basic farmland protection, to assist management of basic farmland and other land management has the extremely important practical significance.