Arid
DOI10.4319/lo.2009.54.1.0086
Groundwater recharge and discharge dynamics in an arid-zone ephemeral lake system, Australia
Costelloe, Justin F.1; Irvine, Elizabeth C.1; Western, Andrew W.1; Herczeg, Andrew L.2
通讯作者Costelloe, Justin F.
来源期刊LIMNOLOGY AND OCEANOGRAPHY
ISSN0024-3590
出版年2009
卷号54期号:1页码:86-100
英文摘要

The Coongie Lakes are a series of ephemeral freshwater lakes on the lower reaches of Cooper Creek, a large intermittent river of the arid Lake Eyre Basin, Australia. Hydrogeological, chemical, and isotopic observations, in conjunction with numerical modeling of groundwater responses to lake inundation events, have been used to identify the dominant processes linking shallow, unconfined groundwater with the hydrology of the lakes during wet and dry periods. The lakes are predominantly zones of net groundwater recharge during inundation events. However, soil profile data suggests that drying of some of these lakes allows evaporative groundwater discharge to occur through the soil profile of the dry lake beds, resulting in salinization of the soil profile of the more ephemeral lakes. The occurrence of young, high-salinity groundwater is best explained by variations in soil profile flushing in response to wet and dry interannual periods of river discharge. During interannual drier phases, when filling of previously dry lakes is more common, recharge is mostly via macropore flow during the rising stage of the inundation. Increased salinization of the lake-bed sediments occurs during longer dry periods due to transport of solutes to the near-surface from lake-bed evaporation and limited flushing of the soil profile because of the macropore-dominated flow during recharge. During wet periods, recharge is more likely dominated by matrix flow that results in leaching of the soil profile and increased export of solutes into the alluvial aquifer.


类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000265168800008
WOS关键词STABLE-ISOTOPE ; SALINE GROUNDWATER ; SALT ACCUMULATION ; SOUTH-AUSTRALIA ; OKAVANGO DELTA ; COOPER CREEK ; WATER-TABLE ; SOIL-WATER ; FLOODPLAIN ; RIVER
WOS类目Limnology ; Oceanography
WOS研究方向Marine & Freshwater Biology ; Oceanography
来源机构Commonwealth Scientific and Industrial Research Organisation
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/161889
作者单位1.Univ Melbourne, Dept Civil & Environm Engn, Melbourne, Vic 3010, Australia;
2.CSIRO, Glen Osmond, SA 5064, Australia
推荐引用方式
GB/T 7714
Costelloe, Justin F.,Irvine, Elizabeth C.,Western, Andrew W.,et al. Groundwater recharge and discharge dynamics in an arid-zone ephemeral lake system, Australia[J]. Commonwealth Scientific and Industrial Research Organisation,2009,54(1):86-100.
APA Costelloe, Justin F.,Irvine, Elizabeth C.,Western, Andrew W.,&Herczeg, Andrew L..(2009).Groundwater recharge and discharge dynamics in an arid-zone ephemeral lake system, Australia.LIMNOLOGY AND OCEANOGRAPHY,54(1),86-100.
MLA Costelloe, Justin F.,et al."Groundwater recharge and discharge dynamics in an arid-zone ephemeral lake system, Australia".LIMNOLOGY AND OCEANOGRAPHY 54.1(2009):86-100.
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