干旱区生态环境知识资源中心(Arid): 延河流域河道需水动态变化分析

Arid

	延河流域河道需水动态变化分析
其他题名	Study on Dynamic Change of River In-stream Flow Requirement in the Yanhe River Basin
	王丽霞 1; 任志远 2; 孔金玲 1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2010
卷号	27 期号:5 页码:680-685
中文摘要	根据延河主要水文站点近50年的降水量,蒸发量,径流量,输沙量等实测资料和各污染站点近10年的水质分析资料,运用相应的水文模型法,分别测算了延河河道基本生态需水,输沙需水,自净需水,蒸散消耗和渗漏消耗需水,并按照最大原则确定河道生态需水量和缺水量,探讨其年内和年际变化特征.结果表明:①延河河道的生态需水主要表现为输沙需水,其年内需求主要集中于夏季,占到全年最小生态需水的65.79%.②50%保证率下的多年平均生态缺水主要发生在每年的7月,且中游河段的缺水最为严重.③20世纪50年代到2005年期间,河道生态需水量呈逐年减少的趋势,生态缺水量有所波动,但变幅不大
英文摘要	Since the early 1990s, eco-hydrology research has been progressed in good time, hopefully, becoming as a specialization subject. Synchronously, the studies on ecological water requirement have been continuously increased as one of the advanced orientations and crucial tasks in this domain,in which many methods have been developed to assess the water resources status for supporting natural functions and services. Although water has the central function of the bloodstream in the biosphere, especially in arid and semiarid regions, such as the Yanhe River Basin in north Shaanxi Province, yet a very limited attention is paid to the role of the water-related processes in ecosystem. At present, however, the dominant studies on this orientation are being conducted in how to confirm the relevant calculation methods. Whereas the exigent tasks and challenging difficulties still exit, for instance, how to quantitatively describe the spatiotemporal features at different scales, and how to confirm the water requirement and farther to its thresholds. Therefore,in this study,a method for measuring ecological water requirement is developed under the support of hydrological models based on the continuous nearly 50-year data including precipitation, evaporation, runoff volume and sediment discharge from the hydrological stations, and 10-year data of water quality from the water pollution observation stations. Moreover, the dynamic change of in-stream flow requirement is lucubrated so as to provide the optimal distribution modes of ecological and economic water consumptions. The results are as follows:(1) Ecological water requirement in the drainage basin is mainly for sediment transfer, especially in summer, and its proportion in the minimum annual ecological water requirement is 65.79% ;(2) At 50% reliability, the ecological water scarcity occurs mainly in July, especially in the middle reaches;(3) During the period from 1956 to 2005, the ecological water consumption was reduced year by year, and the ecological water scarcity fluctuated slightly
中文关键词	生态需水 ; 降水量 ; 蒸发量 ; 输沙量 ; 延河 ; 陕北
英文关键词	ecologica water requirement precipitation evaporation sediment load Yanhe River north of Shaanxi
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:4024659
来源机构	陕西师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225086
作者单位	1.长安大学地球科学与资源学院, 西安, 陕西 710054, 中国; 2.陕西师范大学旅游与环境学院, 西安, 陕西 710062, 中国
推荐引用方式 GB/T 7714	王丽霞,任志远,孔金玲. 延河流域河道需水动态变化分析[J]. 陕西师范大学,2010,27(5):680-685.
APA	王丽霞,任志远,&孔金玲.(2010).延河流域河道需水动态变化分析.干旱区研究,27(5),680-685.
MLA	王丽霞,et al."延河流域河道需水动态变化分析".干旱区研究 27.5(2010):680-685.