A large weighing lysimeter for evapotranspiration and soilwater-groundwater exchange studies

	A large weighing lysimeter for evapotranspiration and soilwater-groundwater exchange studies
	Yang, JF; Li, BQ; Liu, SP
刊名	HYDROLOGICAL PROCESSES
	2000-07-01
卷号	14 期号:10 页码:1887-1897
关键词	Weighing Lysimeter Structure And Design Evapotranspiration Water Exchanges Soil Water Ground-water
文献子类	Article
英文摘要	A large weighing lysimeter was installed at Yucheng Comprehensive Experimental Station, north China, for evapotranspiration and soil-water-groundwater exchanges studies. Features of the lysimeter include the following: (i) mass resolution equivalent to 0.016 min of water to accurately and simultaneously determine hourly evapotranspiration, surface evaporation and groundwater recharge; (ii) a surface area of 3.14 m(2) and a soil profile depth of 5.0 m to permit normal plant development, soil-water extraction, soil-water-groundwater exchanges, and fluctuations of groundwater level; (iii) a special supply-drainage system to simulate field conditions of groundwater within the lysimeter; (iv) a soil mass of about 30 Mg, including both unsaturated and saturated loam. The soil consists mainly of mealy sand and light loam. Monitoring the vegetated lysimeter during the growing period of winter wheat, from October 1998 through to June 1999, indicated that during the period groundwater evaporation contributed 16.6% of total evapotranspiration for a water-table depth from 1.6 m to 2.4 m below ground surface. Too much irrigation reduced the amount of upward water flow from the groundwater table, and caused deep percolation to the groundwater. Data from neutron probe acid tensiometers suggest that soil-water-content profiles and soil-water-potential profiles were strongly affected by shallow groundwater. Copyright (C) 2000 John Wiley & Sons, Ltd.
WOS关键词	WATER-USE ; PERCOLATION ; NITROGEN
语种	英语
出版者	JOHN WILEY & SONS LTD
WOS记录号	WOS:000088508700011
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/68291]
专题	中国科学院地理科学与资源研究所
通讯作者	Yang, JF
作者单位	Chinese Acad Sci, Inst Geog, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Yang, JF,Li, BQ,Liu, SP. A large weighing lysimeter for evapotranspiration and soilwater-groundwater exchange studies[J]. HYDROLOGICAL PROCESSES,2000,14(10):1887-1897.
APA	Yang, JF,Li, BQ,&Liu, SP.(2000).A large weighing lysimeter for evapotranspiration and soilwater-groundwater exchange studies.HYDROLOGICAL PROCESSES,14(10),1887-1897.
MLA	Yang, JF,et al."A large weighing lysimeter for evapotranspiration and soilwater-groundwater exchange studies".HYDROLOGICAL PROCESSES 14.10(2000):1887-1897.