干旱区生态环境知识资源中心(Arid): 库姆塔格沙漠水文调查小流量测验及其误差分析

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	库姆塔格沙漠水文调查小流量测验及其误差分析
其他题名	Low flow measurement and error analysis in hydrologic survey in Kumtag Desert
	王学全 1; 卢琦1 ; 严平 2; 俄有浩 2
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2011
卷号	34 期号:1 页码:20-25
中文摘要	小流量测验是库姆塔格沙漠资源环境本底调查的重要内容.根据库姆塔格沙漠及周边河流泉水野外水文调查(2007-2009),对9条河流泉水16处断面进行了流量测验,分析小流量测验方法及其误差.调查研究表明:(1)库姆塔格沙漠及其周边溪流和泉水枯季径流小,多数河流不适宜用流速仪法实测流量;(2)用V形薄壁堰进行流量测验,其随机不确定度为0.86%,满足水文测验规范要求;小浮标法实测拉配泉流量为(6.0860.460)m3/h,其中标准不确定度0.460 m3/h,相对标准不确定度为7.56%,小于测验规范允许值.(3)V形薄壁堰和小浮标法施测方便,有一定测流精度,是干旱区野外水文调查的适宜方法
英文摘要	Low flow measurement plays a great role in background investigation in the Kumtag Desert environmental resources. The dry season flow in these smaller rivers is not only the main water resource for wildlife, but also for the focus area of plants distribution. In order to test the reliability and accuracy of a suitable discharge measuring strategy for those streams, experimental investigations have been carried out on the small river in and nearby Kumtag Desert. The flow measurements were conducted on 16 sections at 9 rivers in 2007-2009 using the different methods such as current-meter method, triangle weir and small buoy method, flow measurement error were analysied. The results showed as follows:(1) Most of the dry season runoff or spring in the Kumtag Desert rivers is less than 0.5 m3/s, with its irregular channel section it is difficult to measure the discharge by conventional current-meter method. Applicability of velocity measurements using a current meter appears rather hard in the small streams, like the steep ones, such as mountain streams or in general the ones where small water depths and velocities, approach the unreliability ranges of the method. These characteristics are common in a large part of the small rivers flowing across the Kumtag Desert.(2)The flow measurement error by triangle weir box comes mainly from the water gauge reading error. The calculation results show that the flow measurement random uncertainty is 0.86%, lower than the uncertainty specification required for the low flow measurement at first-class accuracy stations. The flow measurements error by small buoys can be divided into depth, width measurement error, buoy velocity error and coefficient. Under the same conditions 9 times independent observation were repeated using small buoys methods at Lapeiquan river, the discharge is(6.0860.460)m3/h, including standard uncertainty for 0.460 m3/h, relative standard uncertainty for 7.56%, less than standard uncertainty set by the code for liquid flow measurement in open channels.(3)Measurement of discharge by triangle weir and small buoy are both easy to conduct and to obtain a good accuracy, they are both the appropriate hydrologic investigation methods in arid region
中文关键词	小流量测验 ; 误差 ; 库姆塔格沙漠 ; V形薄壁堰 ; 小浮标法
英文关键词	low flow measurement measurement error Kumtag Desert triangle weir box small buoy method
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:4145105
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226441
作者单位	1.中国林业科学研究院荒漠化研究所, 北京 100091, 中国; 2.北京师范大学, 北京 100051, 中国
推荐引用方式 GB/T 7714	王学全,卢琦,严平,等. 库姆塔格沙漠水文调查小流量测验及其误差分析[J]. 北京师范大学,2011,34(1):20-25.
APA	王学全,卢琦,严平,&俄有浩.(2011).库姆塔格沙漠水文调查小流量测验及其误差分析.干旱区地理,34(1),20-25.
MLA	王学全,et al."库姆塔格沙漠水文调查小流量测验及其误差分析".干旱区地理 34.1(2011):20-25.