基于乡镇尺度的土地生态安全时空格局评价研究——以博尔塔拉蒙古自治州为例
发布时间：2018-10-23 06:48
【摘要】：近年来,国内外学者已做了大量区域土地生态安全评价的研究,但大多针对流域或县级以上行政单元,乡镇尺度的土地生态安全评价研究甚少。因此,选择地处我国西北干旱生态脆弱区的博尔塔拉蒙古自治州为研究区,以"3S"技术和数学统计方法为支撑,结合研究区自然地理特征和社会经济状况,构建博尔塔拉蒙古自治州乡镇级压力-状态-响应(Pressure-StateResponses,P-S-R)土地生态安全评价模型,并对其土地生态安全空间格局特征及成因进行诊断性分析。结果表明:(1)2014年博州土地生态安全较2011年有所恶化,Ⅲ级向Ⅳ级转化的面积最大,高达2555.33 km~2,主要在温泉县境内,其次是Ⅴ级区域向Ⅳ级转化1356.53 km~2,主要发生在精河县的茫丁乡和托托乡;(2)博州大部分乡镇的土地生态安全状况处于Ⅲ级水平,区域生态结构不稳定,亟待调整;(3)博州土地生态安全状况具有明显地域性分布的特征,低值区多集中于博州东部荒漠地区,高值区多集中在博州中部绿洲区域和湖区。研究结果可为乡镇级土地生态安全评价提供参考,为区域生态保护协调推进与乡镇可持续发展提供理论指导。
[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，
本文编号：2288371
[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，
本文编号：2288371
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