發(fā)布時(shí)間：2018-02-21 04:26

  本文關(guān)鍵詞： 耕地布局優(yōu)化 加權(quán)Voronoi圖 耕地優(yōu)勢(shì)度 土地整理 右江區(qū)　出處：《廣西師范學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：耕地是人類賴以生存的最基本的資源之一,是人類獲取農(nóng)產(chǎn)品基礎(chǔ)條件。我國(guó)人口基數(shù)大,人均耕地占用低,保護(hù)耕地是我國(guó)糧食安全的重要戰(zhàn)略。隨著經(jīng)濟(jì)快速發(fā)展和城市化的推進(jìn),人地矛盾更為凸顯。本研究將百色市右江區(qū)作為研究區(qū)域,右江區(qū)位于右江河谷平原與西北山區(qū)結(jié)合區(qū)域,地形復(fù)雜多樣,耕地空間布局分異特征明顯,隨著右江河谷地區(qū)城鎮(zhèn)化走廊帶規(guī)劃實(shí)施,右江區(qū)城鎮(zhèn)化發(fā)展加速,在該地區(qū)地形條件下,人地矛盾顯得尤為突出。在耕地后備資源少,可開發(fā)難度大情況下,對(duì)該地區(qū)提高對(duì)耕地空間價(jià)值的挖潛,提高耕地聚集程度,對(duì)推進(jìn)現(xiàn)代化農(nóng)業(yè)建設(shè)具有十分重要的意義。出于此,本研究以遙感解譯土地利用現(xiàn)狀數(shù)據(jù),DEM高程數(shù)據(jù)及相關(guān)統(tǒng)計(jì)資料為數(shù)據(jù)基礎(chǔ)結(jié)合景觀指數(shù),統(tǒng)計(jì)分析,Voronoi圖集理論等方法,對(duì)右江區(qū)耕地斑塊進(jìn)行優(yōu)化類型劃分,利用加權(quán)Voronoi圖對(duì)右江耕地進(jìn)行空間布局優(yōu)化,為土地利用規(guī)劃、土地整理和耕地管理提供依據(jù)。主要研究結(jié)果如下:(1)通過對(duì)2009-2012年右江區(qū)耕地地類的構(gòu)成耕地變化情況及變化途徑分析,四年間,右江區(qū)耕地?cái)?shù)量呈下降趨勢(shì),耕地?cái)?shù)量下降局域主要分布在東南右江河谷平原地區(qū),尤其是建設(shè)用地與交通廊道的建設(shè)區(qū)域,通過耕地開墾,農(nóng)用地結(jié)構(gòu)轉(zhuǎn)變等增加的耕地主要分布在西北山區(qū),耕地占補(bǔ)明顯呈現(xiàn)重?cái)?shù)量不重質(zhì)量的情況。(2)通過景觀格局指數(shù)及常規(guī)Voronoi圖分析耕地分布特征,結(jié)果表明:由于山地地形影響,耕地大量集聚分布在河谷平原及山坳,狹窄河谷間,以及西北部溶蝕平原地區(qū)。耕地自然因素和人為因素導(dǎo)致的細(xì)碎化程度較高,斑塊形狀不規(guī)則,可優(yōu)化空間較高。(3)在耕地布局與地形因素,交通,居民點(diǎn)等相關(guān)因素關(guān)系基礎(chǔ)上,構(gòu)建了耕地布局優(yōu)勢(shì)度評(píng)價(jià)體系,將右江區(qū)耕地劃分為:重點(diǎn)保護(hù)型,適宜調(diào)整型,重點(diǎn)調(diào)控型和衰減退出型四種類型。通過生成耕地優(yōu)勢(shì)度加權(quán)Voronoi圖,對(duì)整個(gè)研究區(qū)進(jìn)行重新剖分,將耕地斑塊優(yōu)化類型與加權(quán)Voronoi圖結(jié)合提出右江區(qū)耕地布局優(yōu)化建議。
[Abstract]:Cultivated land is one of the most basic resources on which human beings depend for survival, and it is the basic condition for mankind to obtain agricultural products. China has a large population base and a low per capita occupation of cultivated land. The protection of cultivated land is an important strategy for food security in China. With the rapid development of economy and the development of urbanization, the contradiction between man and land has become more prominent. In this study, Youjiang District of Baise City is regarded as the research area. Youjiang District is located in the combination area of Youjiang River Valley Plain and Northwest Mountain area. The topography is complex and diverse, and the spatial distribution of cultivated land is distinct. With the implementation of planning for the urbanization corridor zone in Youjiang Valley, the urbanization of Youjiang District accelerates. Under the terrain condition of this area, the contradiction between man and land appears to be particularly prominent. In the case of less reserve resources of cultivated land and greater difficulty in exploitation, it is necessary to raise the potential value of cultivated land and increase the degree of cultivated land accumulation in this area. It is of great significance to promote the construction of modern agriculture. For this reason, based on remote sensing interpretation of land use status data and Dem elevation data and related statistical data, combined with landscape index, the paper analyzes the theory of Voronoi diagram, and so on. The optimal types of cultivated land patches in Youjiang region are divided, and the spatial distribution of cultivated land in Youjiang River is optimized by using weighted Voronoi map, which is the land use planning. The main results are as follows: 1) through the analysis of the change of cultivated land composition and the ways of change of cultivated land in Youjiang region from 2009-2012 to 2012, the amount of cultivated land in Youjiang region has been decreasing in the past four years. The decrease of cultivated land quantity is mainly distributed in the plain area of Youjiang River valley in southeast China, especially in the construction area of construction land and traffic corridor. The increase of cultivated land, such as cultivated land reclamation and agricultural land structure change, is mainly distributed in the northwest mountain area. The distribution characteristics of cultivated land were analyzed by landscape pattern index and conventional Voronoi map. The results showed that due to the influence of mountainous terrain, the cultivated land was concentrated and distributed in valley plain and mountain depression. The narrow valley and the northwest eroded plain area. The degree of fineness caused by natural and human factors of cultivated land is higher, and the shape of patch is irregular, which can optimize the space between cultivated land layout and topographic factors, traffic, etc. On the basis of the relationship between residential areas and other related factors, the evaluation system of the dominance degree of cultivated land layout is constructed. The cultivated land in Youjiang area is divided into three types: key protection type, suitable adjustment type, By generating the weighted Voronoi map of cultivated land dominance, the paper redivided the whole study area and put forward the suggestion of farmland layout optimization in Youjiang region by combining the optimal type of cultivated land patch with the weighted Voronoi map.
【學(xué)位授予單位】：廣西師范學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：F323.211

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本文編號(hào)：1520986