【摘要】：近年來,國內(nèi)外學(xué)者已做了大量區(qū)域土地生態(tài)安全評價的研究,但大多針對流域或縣級以上行政單元,鄉(xiāng)鎮(zhèn)尺度的土地生態(tài)安全評價研究甚少。因此,選擇地處我國西北干旱生態(tài)脆弱區(qū)的博爾塔拉蒙古自治州為研究區(qū),以"3S"技術(shù)和數(shù)學(xué)統(tǒng)計(jì)方法為支撐,結(jié)合研究區(qū)自然地理特征和社會經(jīng)濟(jì)狀況,構(gòu)建博爾塔拉蒙古自治州鄉(xiāng)鎮(zhèn)級壓力-狀態(tài)-響應(yīng)(Pressure-StateResponses,P-S-R)土地生態(tài)安全評價模型,并對其土地生態(tài)安全空間格局特征及成因進(jìn)行診斷性分析。結(jié)果表明:(1)2014年博州土地生態(tài)安全較2011年有所惡化,Ⅲ級向Ⅳ級轉(zhuǎn)化的面積最大,高達(dá)2555.33 km~2,主要在溫泉縣境內(nèi),其次是Ⅴ級區(qū)域向Ⅳ級轉(zhuǎn)化1356.53 km~2,主要發(fā)生在精河縣的茫丁鄉(xiāng)和托托鄉(xiāng);(2)博州大部分鄉(xiāng)鎮(zhèn)的土地生態(tài)安全狀況處于Ⅲ級水平,區(qū)域生態(tài)結(jié)構(gòu)不穩(wěn)定,亟待調(diào)整;(3)博州土地生態(tài)安全狀況具有明顯地域性分布的特征,低值區(qū)多集中于博州東部荒漠地區(qū),高值區(qū)多集中在博州中部綠洲區(qū)域和湖區(qū)。研究結(jié)果可為鄉(xiāng)鎮(zhèn)級土地生態(tài)安全評價提供參考,為區(qū)域生態(tài)保護(hù)協(xié)調(diào)推進(jìn)與鄉(xiāng)鎮(zhèn)可持續(xù)發(fā)展提供理論指導(dǎo)。
[Abstract]:In recent years, scholars at home and abroad have done a lot of research on regional land ecological security assessment, but most of them focus on watershed or administrative units above county level, and there are few studies on evaluation of land ecological security on township scale. Therefore, Boltara Mongol Autonomous Prefecture, which is located in the arid ecologically fragile region of northwest China, is chosen as the research area, supported by "3s" technology and mathematical statistical methods, combined with the natural geographical characteristics and social and economic conditions of the study area. The evaluation model of land ecological security at township level (Pressure-StateResponses,P-S-R) was constructed in Bortala Mongolian Autonomous Prefecture, and the characteristics and causes of spatial pattern of land ecological security were analyzed. The results showed that: (1) the land ecological security of Bozhou in 2014 was worse than that in 2011, and the area of grade 鈪，

本文編號：2288371