干旱区生态环境知识资源中心(Arid): 基于景观生态学的黑河流域生态风险评价

Arid

	基于景观生态学的黑河流域生态风险评价
其他题名	Applied research on the risk assessment of the Heihe River Basin based on the theory of landscape ecology
	王若凡; 南忠仁
来源期刊	安全与环境学报
ISSN	1009-6094
出版年	2013
卷号	13 期号:6 页码:133-137
中文摘要	黑河是甘肃省西部干旱区重要的内陆河。以甘肃黑河流域中游地区为主要研究对象,基于景观生态学原理,通过对风险概念模型的扩展和修正,构建了黑河流域生态风险评价模型。通过GIS技术及相关软件实现了对黑河流域生态风险值的定量评价,并绘制了该地区的生态风险值分布图谱。结果表明,黑河流域的生态风险值为0.51,属于中等风险水平。研究区域的风险值分布以黑河为中心自内向外划分为3个明显的风险层次:低水平风险区域集中在黑河周围,主要的景观类型为耕地,该风险区的风险源以人类活动干扰为主;中等风险区域主要分布着林地、草地两种景观类型,这一风险区域是干旱区绿洲的保护屏障区域,也是绿洲和荒漠的过渡区域,受人类活动干扰及自然侵蚀共同影响;较高风险区域周围分布着沙漠、戈壁,常年受干旱区光热条件的影响,自然侵蚀作用明显。从评价结果来看,构建的生态风险评估方法能够客观反映黑河流域的生态风险水平及其分布。
英文摘要	The paper intends to present its authors’ assessment of the ecological landscape in-situ of the HeiHe River Basin, Gansu, whic h is characterized by its ecological vulnerability and great humidity volatility because it is surrounded by the desert environment in addition to the natural di sasters and ecological degradation caused by human activities. The local ecologi cal history indicates what great stress and how serious exposure tend to come do wn to the river basin to hit it and what kind of negative effects is expected to be exposed to. This present study intends to take it as a case study the middle reach of the HeiHe River Basin in facing the ecological hazards, based on the theory of landscape protection and the technology of the advanced Geographic Info rmation Systems (GIS). In proceeding with our study, we have established a quant itative method for the assessment of ecological risks in the district. The spatial distribution of the eco-risk of the area can be divided into three sections in regard with the hazardous levels. The first section of the area can be said an area subject to the minimal risk or low-risk level, which is surrounded by the main stream of the river. The second section can be said to be subject to the mi ddle-level risks, which is further from the River, than the first one, whereas the third section, that is the final section, can be regarded as an area likely to be exposed to the severe natural disastrous risks. This part is located actual ly out of the areas under our research. In this third section of the area, thenorth part is bordered on the Badan Jara Desert and the area eroded due to the sc arcity of vegetation and serious water shortage in the past few years, whereas the southern high risk area is adjacent to the Qilian Mountain and heavily eroded due to the soil erosion in the recent years. In the last part of this paper, we have done a comparative study. The conclusion made according to the comparison indicates the validity of our methods, which can be expected to be consistent with the decisions of the future policy-makers and provide them with a technical support in environmental protection of the river basin.
中文关键词	环境学 ; 黑河流域 ; 生态环境 ; 风险评价 ; 风险图谱 ; 风险分布图
英文关键词	environmentalology Heihe River Basin ecological environmental risk assessment risk map risk distribution map
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5029362
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229205
作者单位	兰州大学资源环境学院, 兰州, 甘肃 730030, 中国
推荐引用方式 GB/T 7714	王若凡,南忠仁. 基于景观生态学的黑河流域生态风险评价[J]. 兰州大学,2013,13(6):133-137.
APA	王若凡,&南忠仁.(2013).基于景观生态学的黑河流域生态风险评价.安全与环境学报,13(6),133-137.
MLA	王若凡,et al."基于景观生态学的黑河流域生态风险评价".安全与环境学报 13.6(2013):133-137.