干旱区生态环境知识资源中心(Arid): Spatial-temporal differences in in-stream flow requirement based on GIS： A case study of Yan＇an region, northern Shaanxi

Arid

DOI	10.1007/s11442-008-0107-4
	Spatial-temporal differences in in-stream flow requirement based on GIS： A case study of Yan＇an region, northern Shaanxi
	WANG Lixia; REN Zhiyuan
来源期刊	Journal of Geographical Sciences
ISSN	1009-637X
出版年	2008
卷号	18 期号:1 页码:107-114
英文摘要	Although water has the central function of the bloodstream in the biosphere especially in arid or semi-arid regions such as Yah＇an region in northwestern China, yet the very limited attention is paid to the role of the water-related processes in ecosystem. In this research, based on continuous nearly 50-year data including runoff volume, sediment discharge as well as sediment accretion from hydrographic stations, and 10-year information of water quality from pollution monitoring stations, the method for measuring in-stream flow requirement has been put forward supported by experiential models and GIS spatial analysis. Additionally, the changes of in-stream flow requirement for environment and economic development have been addressed from spatial-temporal dimensions. The results show that：（1） According to the central streams in Yan＇an region, mean annual in-stream flow requirement reaches 1.0619 billion m^3, and the surface water for economic exploitation is 0.2445 billion m3 （2） Mean annual in-stream flow requirement for sediment transfers in flood period occupies over 80% of the integrated volume in a year. （3） From the 1950s to 1970s, in-stream flow requirement for sediment transfers is comparatively higher, while from the 1980s to 1990s, this requirement presents a decreasing tendency.
英文关键词	GIS spatial analysis Yan＇an region in-stream flow requirement spatial-temporal differences
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:3249858
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334964
作者单位	WANG Lixia, College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi＇an, Shaanxi 710062, China.; REN Zhiyuan, College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi＇an, Shaanxi 710062, China.
推荐引用方式 GB/T 7714	WANG Lixia,REN Zhiyuan. Spatial-temporal differences in in-stream flow requirement based on GIS： A case study of Yan＇an region, northern Shaanxi[J],2008,18(1):107-114.
APA	WANG Lixia,&REN Zhiyuan.(2008).Spatial-temporal differences in in-stream flow requirement based on GIS： A case study of Yan＇an region, northern Shaanxi.Journal of Geographical Sciences,18(1),107-114.
MLA	WANG Lixia,et al."Spatial-temporal differences in in-stream flow requirement based on GIS： A case study of Yan＇an region, northern Shaanxi".Journal of Geographical Sciences 18.1(2008):107-114.