Arid
DOI10.2113/4.1.72
Chloride mass balance: Cautions in predicting increased recharge rates
Gee, GW; Zhang, ZF; Tyler, SW; Albright, WH; Singleton, MJ
通讯作者Gee, GW
来源期刊VADOSE ZONE JOURNAL
ISSN1539-1663
出版年2005
卷号4期号:1页码:72-78
英文摘要

The chloride mass balance (CMB) method has been used extensively to estimate recharge in arid and semiarid environments. Required data include estimates of annual precipitation, total Cl- input (from dry fallout and precipitation), and pore water Cl- concentrations. Typically, CMB has been used to estimate ancient recharge, but recharge from recent land-use change has also been documented. Recharge rates below a few millimeters per year are reliably detected with CMB; however, estimates above a few millimeters per year appear to be less reliable. We tested the CMB method against 26 yr of drainage from a 7.6-m-deep lysimeter at a simulated waste burial ground located on the Department of Energy’s Hanford Site in southeastern Washington, USA where removal of vegetation has increased recharge rates. Measured drainage from the lysimeter for the past 26 yr averaged 62 mm yr(-1). Precipitation averaged 190 mm yr(-1) with an estimated Cl- input of 0.22 mg L-1. Initial pore water Cl- concentration was 88 mg L-1 and decreased to about 6 mg L-1 after 26 yr, while the drainage water Cl- concentration decreased to <1 mg L-1. A recharge estimate made using Cl- concentrations in drain water was within 26% of the measured drainage rate. In contrast, recharge estimates using 1: 1 (water/soil) extracts were lower than actual values by factors ranging from 2 to 8 or more. The results suggest that when recharge is above a few millimeters per year, soil water extracts can lead to unreliable estimates of recharge.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000227469300006
WOS关键词ENVIRONMENTAL TRACERS ; WATER ; TRANSPORT ; BASIN ; ZONE ; FLOW
WOS类目Environmental Sciences ; Soil Science ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Agriculture ; Water Resources
来源机构University of California, Berkeley ; Desert Research Institute
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/150470
作者单位(1)Pacific NW Natl Lab, Richland, WA 99352 USA;(2)Univ Nevada, Reno, NV 89557 USA;(3)Desert Res Inst, Reno, NV USA;(4)Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
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GB/T 7714
Gee, GW,Zhang, ZF,Tyler, SW,et al. Chloride mass balance: Cautions in predicting increased recharge rates[J]. University of California, Berkeley, Desert Research Institute,2005,4(1):72-78.
APA Gee, GW,Zhang, ZF,Tyler, SW,Albright, WH,&Singleton, MJ.(2005).Chloride mass balance: Cautions in predicting increased recharge rates.VADOSE ZONE JOURNAL,4(1),72-78.
MLA Gee, GW,et al."Chloride mass balance: Cautions in predicting increased recharge rates".VADOSE ZONE JOURNAL 4.1(2005):72-78.
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