發(fā)布時間：2018-05-23 21:28

  本文選題：景觀格局 + 土地生態(tài)適宜性分析　； 參考：《甘肅農(nóng)業(yè)大學》2015年碩士論文

【摘要】：本文以景觀生態(tài)學理論為指導,以酒泉市肅州區(qū)為研究區(qū)域,在景觀格局分析和土地生態(tài)適宜性分析的基礎上構建肅州區(qū)區(qū)域生態(tài)安全格局。最后,運用最小累積阻力模型分別對無生態(tài)安全約束和基于區(qū)域生態(tài)安全格局的城鎮(zhèn)用地擴張模式進行預景。研究結果表明:(1)按照土地利用分類劃分景觀組分,研究區(qū)域一共有10種景觀組分類型,其中未利用地占整個研究區(qū)域的63.5%是該區(qū)域的景觀基質,其它景觀組分類型以斑塊的形式在該區(qū)域出現(xiàn)。水域和道路起廊道作用。耕地、林地和未利用地隨著高程的增加而減少,水域分布在高程較低的地區(qū),景觀組分的分布特征受高程影響顯著,研究區(qū)域總體生態(tài)資源分布不平衡,高程1131m-1439m是各類景觀組分分布最全面的地區(qū)。(2)總體來看,肅州區(qū)的景觀破碎度指數(shù)(FN)、景觀分離度指數(shù)(Vi)、景觀多樣性指數(shù)(H)、景觀聚集度指數(shù)(CONT)在不同的高程區(qū)域差異明顯。在整個研究區(qū)域內部,景觀均勻度指數(shù)(E)和景觀優(yōu)勢度指數(shù)(D)差異較小。(3)肅州區(qū)的宜農(nóng)地、宜林地、宜牧地分布占全區(qū)土地總面積的21.3%、2.3%、8.2%;其分布特征在不同的高程區(qū)域差異較大,宜農(nóng)用地全部分布在高程較低的地區(qū),宜林一等地在各高程區(qū)域分布均衡,宜林二等地主要分布在高程較低的區(qū)域;宜牧地主要分布在高程1131m-1439m和高程1942m-2544m的區(qū)域。(4)根據(jù)肅州區(qū)景觀格局和土地生態(tài)適宜性的特點構建由“山地生態(tài)涵養(yǎng)區(qū)——綠洲生態(tài)農(nóng)業(yè)區(qū)——荒漠風沙防治區(qū)”組成的區(qū)域協(xié)調、功能互補的區(qū)域生態(tài)安全格局。山地生態(tài)屏障區(qū)主要包括位于祁連山北麓的五個鄉(xiāng)鎮(zhèn),該區(qū)域地處洪積扇頂、扇腰地帶,灘大溝深,尤其是邊遠村落地廣人稀;綠洲生態(tài)農(nóng)業(yè)區(qū)位于沖積扇中部和下部地帶,主要包括下河清鄉(xiāng)及下河清農(nóng)場、上壩鎮(zhèn)、總寨鎮(zhèn),這些鄉(xiāng)鎮(zhèn)土壤肥沃,土層深厚,混灌便利,形成以糧食生產(chǎn)為主,兼顧林業(yè)和牧業(yè)的土地利用格局;荒漠風沙防治區(qū)在全區(qū)均有分布。(5)本研究選取了對肅州區(qū)未來發(fā)展和生態(tài)環(huán)境有影響作用的城鎮(zhèn)用地作為“源”斑塊,選取高程、距主要道路的距離、最近生態(tài)用地距離做為阻力因子通過建立最小累積阻力模型對其擴張的趨勢進行模擬,對預景結果做了分析。
[Abstract]:Based on landscape ecology theory and Jiuquan Suzhou district, this paper constructs a regional ecological security pattern based on landscape pattern analysis and land ecological suitability analysis. Finally, the model of urban land expansion without ecological security constraints and based on regional ecological security pattern is forecasted by using the minimum cumulative resistance model. The results show that there are 10 landscape components in the study area according to the classification of land use, of which 63.5% of the unused land is the landscape matrix of the study area. Other landscape components appeared in the region as patches. Water and roads act as corridors. The cultivated land, woodland and unused land decreased with the increase of elevation, and the water distribution in the area with lower elevation, the distribution characteristics of landscape components were significantly affected by elevation, and the overall ecological resources distribution was not balanced in the study area. Elevation 1131m-1439m is the most comprehensive distribution of all kinds of landscape components. (2) overall, the landscape fragmentation index, landscape separation index, landscape diversity index and landscape aggregation index in Suzhou area are obviously different in different elevation regions. Within the whole study area, the difference between landscape evenness index (E) and landscape dominance index (D) was small.) the suitable agricultural land, forest land and suitable grazing land occupied 21.32.3and 8.2% of the total land area in Suzhou district, and the distribution characteristics of them were quite different in different elevation regions. The suitable agricultural land is distributed in the area with lower elevation, the first grade land in Yilin is balanced in each elevation area, and the second grade land in Yilin is mainly distributed in the area with lower elevation. The suitable pastoral land is mainly distributed in the area of elevation 1131m-1439m and elevation 1942m-2544m.) according to the landscape pattern and the characteristics of land ecological suitability in Suzhou, a regional coordination composed of "mountain ecological conservation region-oasis ecological agricultural region-desert wind-sand control area" is constructed. Regional ecological security pattern with complementary functions. The mountain ecological barrier area mainly includes five villages and towns located at the northern foot of Qilian Mountains. The area is located at the top of the alluvial fan, the fan waist, the deep beach and gully, especially the remote villages, and the oasis ecological agricultural area is located in the middle and the lower part of the alluvial fan. It mainly includes Xiaheqing Township and Xiaheqing Farm, Shangba Town, Quanzhai Town. These villages and towns have fertile soil, deep soil layer, convenient mixed irrigation, and form a land use pattern which is based on grain production and takes into account forestry and animal husbandry. In this study, the urban land which has influence on the future development and ecological environment of Suzhou district was selected as the "source" patch, the height was chosen, and the distance from the main road was chosen. Recent ecological land use distance as a drag factor is simulated by establishing a minimum cumulative resistance model to simulate the trend of its expansion, and the pre-view results are analyzed.
【學位授予單位】：甘肅農(nóng)業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P901

【參考文獻】

相關期刊論文 前10條

1 涂小松;濮勵杰;吳駿;朱明;;基于SLEUTH模型的無錫市區(qū)土地利用變化情景模擬[J];長江流域資源與環(huán)境;2008年06期

2 王偉霞;張磊;董雅文;黃文鈺;;基于沿江開發(fā)建設的生態(tài)安全格局研究——以九江市為例[J];長江流域資源與環(huán)境;2009年02期

3 陳國階;論生態(tài)安全[J];重慶環(huán)境科學;2002年03期

4 左偉,王橋,王文杰,劉建軍,楊一鵬;區(qū)域生態(tài)安全評價指標與標準研究[J];地理學與國土研究;2002年01期

5 陳星;周成虎;;生態(tài)安全:國內外研究綜述[J];地理科學進展;2005年06期

6 張虹波;劉黎明;;土地資源生態(tài)安全研究進展與展望[J];地理科學進展;2006年05期

7 張惠遠,王仰麟;土地資源利用的景觀生態(tài)優(yōu)化方法[J];地學前緣;2000年S2期

8 魏偉;石培基;趙軍;王旭峰;;石羊河流域海拔、植被覆蓋與景觀類型空間關系研究[J];干旱區(qū)地理;2012年01期

9 黃青,任志遠;論生態(tài)承載力與生態(tài)安全[J];干旱區(qū)資源與環(huán)境;2004年02期

10 王學良;席武俊;蓋艾鴻;;基于DEM的云南楚雄高原地貌特征研究[J];甘肅農(nóng)業(yè)大學學報;2011年06期

相關博士學位論文 前1條

1 周上游;農(nóng)業(yè)生態(tài)安全與評估體系研究[D];中南林學院;2004年

相關碩士學位論文 前1條

1 王妍;基于DEM的地形信息提取與景觀空間格局分析[D];西南大學;2006年

，

本文編號：1926438