干旱区生态环境知识资源中心(Arid): 甘肃省生态环境敏感性评价及其空间分布

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	甘肃省生态环境敏感性评价及其空间分布
其他题名	Eco-environmental sensitivity and its spatial distribution in Gansu Province
	刘康 1; 欧阳志云 2; 王效科 2; 徐卫华 2; 苗鸿 2
来源期刊	生态学报
ISSN	1000-0933
出版年	2003
卷号	23 期号:12 页码:2711-2718
中文摘要	为了促进生态环境建设和保护，实施宏观规划和管理，研究以甘肃省为案例，从方法论的角度，利用生态环境现状调查资料和相关研究成果进行了生态环境敏感性的综合评价，辩识出了甘肃省主要生态环境敏感区域。研究结果表明：（1）在生态环境调查的基础上，应用GIS空间分析方法进行生态环境敏感性评价具有可操作性和结果的可靠性。（2）甘肃省的生态环境敏感性区域分布比较广泛，极敏感区占全省面积的1.1%，高度敏感区占57.4%。其中水土流失极敏感区占0.21%，高度敏感区占24.6%，主要集中在黄土高原，甘南高原南部和北部，陇南山地的西礼盆地、徽成盆地等地区；沙漠化极敏感区面积占0.8%，高度敏感区面积占33.1%，主要集中在甘肃北部、安西中部地区和肃北的东南部；土壤盐渍化基本无极敏感区，高度敏感区域占1.1%，主要集中在疏勒河中下游、黑河中游以及石羊河下游。对于这些敏感区域的保护，应该是生态环境保护和建设的重中之重。
英文摘要	For regional social and economic sustainable development, strengthening ecosystem management at provincial scale is prerequisite. One of the most important tool is to identify the critical or sensitive area that is easy to be degraded. So herein a methodology of eco-environmental sensitivity assessment was proposed and a case of Gansu Province was studied. Eco-environmental sensitivity was defined as the possibility of formation and generation of eco-environment problem in a given region influenced by natural factors. High sensitivity region is the one where eco-environmental problems may occur easily in disturbance of human activity. In this paper, eco-environmental problems considered are water erosion, desertification, salinisation as assessment objects. For each object, major influencing factors are identified, water erosion is influenced by rainfall erosivity, soil texture, relief, and vegetation type, desertification is influenced by wetness index, soil texture, days the wind speed > 6 m/s, and vegetation cover; salinisation is influenced by evaporation/precipitation, underwater minerality, and geomorphology. Each influencing factor was graded into 5 classes of sensitivity to eco-environmental problem: insensitive, less sensitive, sensitive, more sensitive, and the most sensitive. Based on the information of eco-environmental investigation and previous studies, we have drawn the distributions of sensitivity of factors influencing eco-environmental problems. Integrated assessments of sensitivity to water erosion, desertification, salinisation have been done from multiplying each sensitivity of influencing factor by GIS technique. The following results have been obtained. Firstly, in Gansu Province, the region sensitive or more to eco-environmental problem was large and widely distributed. The most sensitive region took up 1. 1% of the total area of the province, and the more sensitive region 57.4%. In the total area of sensitive or more region, the most sensitive of water erosion cover an area of 0.21%, mainly Malian watershed of Jing River, Hulu river watershed of Wei River and Zuli river watershed of Yellow river. And the more -sensitive of water erosion cover an area of 24.6%, mainly in loess plateau, south and north of Gannan Plateau, and Xili and Huicheng basin of Longnan mountainous region. The most sensitive of desertification cover 0.8%, mainly in the north of Gansu, the middle part of Anxi county, and southeast corner of Subei county, the more sensitive region of desertification cover 33.1%, mainly in Hexi Corridor, and its north Alashan Plateau, Beishan Mountain, the front belt of east Aerjin Mountain, north hill of Loess Plateau and Yellow river coastwise of Gannan plateau. There is no region the most sensitive to salinisation. The more sensitive region to salinisation take up 1.1%, mainly in the middle-lower reaches of Shule River, the middle-lower reaches of Hei River and the lower reaches of Shiyang River. Secondly, the sensitivity assessment results are consistent with present distribution of eco-environment problems. High sensitivity region is properly the region where eco-environment problems are very serious now, which shows that it is manipulnbility and reliability to use GIS-based assessment of eco-environment sensitivity described in this paper. Thirdly, high sensitive region of eco-environment problem identified in this paper should be taken as priority area for ecological protection and restoration, and taken more counter-measure
中文关键词	生态环境 ; 敏感性 ; 空间分析 ; 评价 ; 甘肃省
英文关键词	eco-environment problem sensitivity spatial analysis assessment Gansu Province
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ENGINEERING
WOS研究方向	Agriculture
CSCD记录号	CSCD:1270525
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204307
作者单位	1.西北大学城市与资源学系, 西安, 陕西 710069, 中国; 2.中国科学院生态环境研究中心, 北京 100085, 中国
推荐引用方式 GB/T 7714	刘康,欧阳志云,王效科,等. 甘肃省生态环境敏感性评价及其空间分布[J],2003,23(12):2711-2718.
APA	刘康,欧阳志云,王效科,徐卫华,&苗鸿.(2003).甘肃省生态环境敏感性评价及其空间分布.生态学报,23(12),2711-2718.
MLA	刘康,et al."甘肃省生态环境敏感性评价及其空间分布".生态学报 23.12(2003):2711-2718.