本文關(guān)鍵詞：基于GIS和GRA模型的縣域耕地自然質(zhì)量等級評價　出處：《東華理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 耕地自然質(zhì)量評價 灰色關(guān)聯(lián) GIS 弋陽縣

【摘要】：為了科學(xué)有效的對耕地資源進(jìn)行管理,全面摸清縣域內(nèi)耕地的“質(zhì)”和“量”的變化情況與轉(zhuǎn)移趨勢,保證耕地資源管理的有效性、現(xiàn)勢性和前瞻性。進(jìn)行縣級耕地自然質(zhì)量等別更新評價十分必要,對耕地質(zhì)量管理建設(shè)和耕地保護(hù)工作具有重要意義。目前縣域內(nèi)的耕地質(zhì)量評價一般都是根據(jù)《農(nóng)用地分等定級規(guī)程》中所規(guī)范認(rèn)可的方法進(jìn)行評價,這些評價大多采用的是層次分析法或者主成分分析法進(jìn)行的,指標(biāo)因子的確定和因子權(quán)重的確定具有相當(dāng)強(qiáng)的人為主觀性,造成評價結(jié)果的可靠性得不到保證。為此,本文通過引入GIS技術(shù)和灰色系統(tǒng)理論,研究建立基于GIS和GRA模型的耕地自然質(zhì)量評價方法,并以江西省弋陽縣為例進(jìn)行實(shí)證研究。本文應(yīng)用灰度關(guān)聯(lián)分析建模的方法對耕地自然質(zhì)量進(jìn)行評價。評價前首先綜述了國內(nèi)外研究現(xiàn)狀以及進(jìn)行相關(guān)理論研究,確立了本次課題的理論依據(jù)和指導(dǎo)思想。其次,收集實(shí)驗所需資料,利用ArcGIS、MAPGIS、Microsoft Excel等軟件建立了評價基礎(chǔ)數(shù)據(jù)庫為實(shí)驗的開始做充分的準(zhǔn)備。然后通過構(gòu)建灰色關(guān)聯(lián)分析的耕地自然質(zhì)量評價模型選擇評價因子,根據(jù)公式計算出評價因子的關(guān)聯(lián)度和權(quán)重,依據(jù)關(guān)聯(lián)度結(jié)果對因子進(jìn)行敏感性排序。最后根據(jù)農(nóng)用地分等定級方法獲得評價單元的自然質(zhì)量等別情況。研究結(jié)果得出,弋陽縣耕地國家自然等別主要分布在8-12等,中以9等分布最為廣泛,面積為15898.96公頃,占全縣總耕地面積的48.18%;最低等別12等地面積較少,主要分布在曹溪鎮(zhèn)、漆工鎮(zhèn)、三縣嶺綜合墾殖場、中畈鄉(xiāng),面積為359.04公頃,占全縣耕地面積的1.09%。其中水田國家自然等主要分布在8等與9等,占弋陽耕地總面積的82.23%;旱地主要分布在10等和11等,占耕地總面積的8.45%�？傮w上看,弋陽縣耕地自然質(zhì)量屬于中等偏上。通過與農(nóng)用地分等成果的等別占重對比發(fā)現(xiàn),自上輪農(nóng)用地分等以來,弋陽縣土地整治工作到位,弋陽縣耕地自然質(zhì)量有所提升。弋陽縣耕地的各影響因素的關(guān)聯(lián)度排序為水田:灌溉保證率有機(jī)質(zhì)含量土壤質(zhì)地剖面構(gòu)型排水條件土壤酸堿度;旱地:有效土層厚度灌溉保證率有機(jī)質(zhì)含量地形坡度土壤質(zhì)地土壤酸堿度。
[Abstract]:In order to scientific and effective management of cultivated land resources, change and transfer trend of comprehensive county farmland "quality" and "quantity", to ensure the effectiveness of land resources management, current and prospective. The cultivated land natural quality evaluation is very necessary not to update, is of great significance to the quality management of cultivated land the construction and cultivated land protection work. At present, the quality evaluation of cultivated land within the county are generally recognized according to the standard methods of farmland gradation and evaluation procedures > in the evaluation, is mostly used AHP or principal component analysis method, to determine the weight of index and factor factor has very strong subjectivity, resulting in reliability evaluation results can not be guaranteed. Therefore, this article through the introduction of GIS technology and the theory of grey system, study the establishment of land natural GIS and based on GRA model The quality evaluation method, taking Jiangxi County of Yiyang Province as an example of empirical research. In this paper the application of grey relational analysis modeling method to evaluate the natural quality of cultivated land. The evaluation firstly summarizes the research status at home and abroad and the related theoretical research, this paper establishes the theoretical basis and guiding ideology. Secondly, the collection the information required by ArcGIS, MAPGIS, Microsoft Excel and other software to establish a database on the basis of evaluation and make full preparations for the start of the experiment. Then through the construction of farmland natural quality evaluation grey relational analysis model selection evaluation factor, calculate the correlation degree and the weights of evaluation factors according to the formula, based on the correlation results of sensitivity factor finally get the evaluation unit physical quality grade according to the method of farmland grading. The results of this study, the national nature of cultivated land in Yiyang County Don't mainly distributed in 8-12, in 9, the most widely distributed, an area of 15898.96 hectares, accounting for 48.18% of the total cultivated area of the county; 12, the lowest not less area, mainly distributed in the Jogyesa Town, lacquerer Town, three Ling County comprehensive reclamation farm, in Fan Village, an area of 359.04 hectares, accounting for county wide cultivated area 1.09%. which are mainly distributed in the natural state of paddy field 8 and 9, accounting for 82.23% of the total area of cultivated land in Yiyang; land is mainly distributed in 10 and 11, accounting for 8.45%. of the total farmland on the whole, the natural quality of cultivated land in Yiyang County belong to the middle. And through the result of agricultural land classification the other was heavy comparison, since the last round of agricultural land, Yiyang county land remediation work place, the natural quality of cultivated land in Yiyang county. Yiyang county farmland improved factors correlation order: paddy field irrigation guarantee rate of the organic matter content of soil texture profile Soil acidity and alkalinity of configuration drainage conditions; dry land: effective soil thickness irrigation guarantee rate of organic matter content, terrain slope, soil texture and soil alkalinity.

【學(xué)位授予單位】：東華理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P208;F323.211

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

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本文編號：1373347