發(fā)布時(shí)間：2018-06-25 20:17

  本文選題：地評價(jià) + 評價(jià)模型�。� 參考：《湖南農(nóng)業(yè)大學(xué)》2014年碩士論文

【摘要】：以湘潭市岳塘區(qū)為研究區(qū)域,以該區(qū)域的DEM數(shù)據(jù)、農(nóng)村土地現(xiàn)狀數(shù)據(jù)和地力等級數(shù)據(jù)作為數(shù)據(jù)源,借助ArcGIS軟件作為數(shù)據(jù)處理平臺,分別從自然條件與生態(tài)安全條件,經(jīng)濟(jì)效益等方面分析當(dāng)?shù)亻_發(fā)耕地后備資源的潛力,建立評價(jià)指標(biāo)體系和評價(jià)模型,評價(jià)了耕地后備資源開發(fā)利用等級和分布,提出了耕地后備資源開發(fā)利用的建議,為湘潭市岳塘區(qū)耕地后備資源的開發(fā)利用提供科學(xué)依據(jù)。主要研究結(jié)果如下。(1)構(gòu)建了耕地后備資源開發(fā)利用評價(jià)體系。針對湘潭市岳塘區(qū)的耕地后備資源條件,選取了該區(qū)DEM數(shù)據(jù)(提取該區(qū)的坡度)、侵蝕程度、土壤的厚度、土壤質(zhì)地、土壤有機(jī)質(zhì)含量、農(nóng)田基本設(shè)施、灌溉能力、輸水方式、土壤結(jié)構(gòu)、排水能力、交通通達(dá)率等十三個(gè)評價(jià)因子,運(yùn)用層次分析法和專家打分法確定評價(jià)權(quán)重與分值,建立開發(fā)利用評價(jià)指標(biāo)體系。(2)研究了基于GIS的耕地后備資源評價(jià)方法。以湘潭市岳塘區(qū)為研究區(qū),利用30 m分辨率的DEM圖,提取高程、坡度,通過該區(qū)土地利用現(xiàn)狀圖,提取耕地后備資源圖斑,提取研究區(qū)交通圖,利用全國第二次上壤普查成果,提取上層厚度、上壤質(zhì)地、土壤有機(jī)質(zhì)、土壤結(jié)構(gòu)、排水能力、灌溉能力等數(shù)據(jù)。以分辨率為30×30 m的評價(jià)單元實(shí)施疊加運(yùn)算,獲得每個(gè)評價(jià)單元的綜合分值,運(yùn)用GIS空間分析功能,進(jìn)行柵格疊加運(yùn)算,得到整個(gè)研究區(qū)的耕地后備資源開發(fā)利用適宜性等級。(3)根據(jù)建立的耕地后備資源開發(fā)利用評價(jià)指標(biāo)體系和研究的評價(jià)方法,應(yīng)用GIS平臺計(jì)算耕地后備資源的適宜性等級、分布情況、各等級面積。得到了湘潭市岳塘區(qū)在生態(tài)安全下的耕地后備資源開發(fā)利用適宜性評價(jià)結(jié)果。耕地后備資源主要分布在岳塘區(qū)的東北部地區(qū),總共面積為63826.40 hm2,其中最適宜的耕地后備資源為37295.10 hm2,占58.4%,適宜的耕地后備資源為19694.70 hm2,占30.8%,最不適宜的耕地后備資源有1928.70 hm2,占11.8%,湘潭市岳塘區(qū)可供開發(fā)利用的耕地后備資源相對較多,且質(zhì)量相對較好。(4)提出了針對湘潭市岳塘區(qū)耕地后備資源開發(fā)利用的建議,主要包括調(diào)整作物播種類型、對于坡度較低,交通便利的地區(qū)可采用機(jī)械化來提高開發(fā)利用的經(jīng)濟(jì)效益,政府通過政策引導(dǎo)作物播種,充分開發(fā)利用耕地后備資源。
[Abstract]:Taking Yuetang District of Xiangtan City as the research area, taking Dem data, rural land status data and land fertility grade data as data sources, and using ArcGIS software as data processing platform, the natural conditions and ecological security conditions are analyzed respectively. This paper analyzes the potential of local cultivated land reserve resources in economic benefits, establishes an evaluation index system and evaluation model, evaluates the grade and distribution of cultivated land reserve resources development and utilization, and puts forward some suggestions for the development and utilization of cultivated land reserve resources. To provide scientific basis for the development and utilization of cultivated land reserve resources in Yuetang District, Xiangtan City. The main results are as follows: (1) the evaluation system of cultivated land reserve resources development and utilization is constructed. According to the condition of cultivated land reserve resources in Yuetang District, Xiangtan City, Dem data, erosion degree, soil thickness, soil texture, soil organic matter content, farmland infrastructure, irrigation capacity, water conveyance mode were selected. Thirteen evaluation factors, such as soil structure, drainage capacity, and traffic access rate, were used to determine the evaluation weights and scores by using the Analytic hierarchy process (AHP) and the expert scoring method. The evaluation index system of exploitation and utilization is established. (2) the evaluation method of cultivated land reserve resources based on GIS is studied. Taking Yuetang District of Xiangtan City as the research area, using Dem map with 30 m resolution, the elevation and slope are extracted. Through the land use present situation map in this area, the plot of cultivated land reserve resources is extracted, the traffic map of the research area is extracted, and the results of the second national survey on soil are used. The data of upper layer thickness, soil texture, soil organic matter, soil structure, drainage capacity and irrigation capacity were extracted. The evaluation unit with a resolution of 30 脳 30 m is used to perform superposition operation, and the comprehensive score of each evaluation unit is obtained, and the grid superposition operation is carried out by using the spatial analysis function of GIS. According to the evaluation index system of cultivated land reserve resources development and utilization and the evaluation method, the suitability grade of cultivated land reserve resources is calculated by using GIS platform. Distribution, each grade area. The evaluation results of cultivated land reserve resources exploitation and utilization under ecological security in Yuetang District of Xiangtan City were obtained. Cultivated land reserve resources are mainly distributed in the northeast of Yuetang District, The total area is 63826.40 hm ~ 2, of which the most suitable reserve resource of cultivated land is 37295.10 hm ~ 2 (58.4%), the suitable reserve resource of cultivated land is 19694.70 hm ~ 2 (30.8mm ~ 2), and the most unsuitable reserve resource of cultivated land is 1928.70 hm ~ (2), accounting for 11.8%. The cultivated land in Yuetang District of Xiangtan City is available for development and utilization. The reserve resources are relatively large, And the quality is relatively good. (4) suggestions for the development and utilization of cultivated land reserve resources in Yuetang District of Xiangtan City are put forward, including the adjustment of crop sowing type, and the lower slope. Mechanization can be used to improve the economic benefit of development and utilization in areas with convenient transportation, and the government can fully develop and utilize the reserve resources of cultivated land through policies to guide the planting of crops.
【學(xué)位授予單位】：湖南農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：F323.211;S127

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

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本文編號：2067346