干旱区生态环境知识资源中心(Arid): Using multiple methods to investigate the effects of land-use changes on groundwater recharge in a semi-arid area

Arid

DOI	10.5194/hess-25-89-2021
	Using multiple methods to investigate the effects of land-use changes on groundwater recharge in a semi-arid area
	Barua, Shovon; Cartwright, Ian; Dresel, P. Evan; Daly, Edoardo
通讯作者	Barua, S (corresponding author), Monash Univ, Sch Earth Atmosphere & Environm, Clayton, Vic 3800, Australia.
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN	1027-5606
EISSN	1607-7938
出版年	2021
卷号	25 期号:1 页码:89-104
英文摘要	Understanding the applicability and uncertainties of methods for documenting recharge rates in semi-arid areas is important for assessing the successive effects of land-use changes and understanding groundwater systems. This study focuses on estimating groundwater recharge rates and understanding the impacts of land-use changes on recharge rates in a semi-arid area in southeast Australia. Two adjacent catchments were cleared similar to 180 years ago following European settlement, and a eucalypt plantation forest was subsequently established similar to 15 years ago in one of the catchments. Chloride mass balance analysis yields recharge rates of 0.2 to 61.6 mm yr(-1) (typically up to 11.2 mm yr(-1)). The lower of these values probably represents recharge rates prior to land clearing, whereas the higher likely reflects recharge rates following the initial land clearing. The low pre-land-clearing recharge rates are consistent with the presence of old groundwater (residence times up to 24 700 years) and the moderate-to-low hydraulic conductivities (0.31 to 0.002 m d(-1)) of the aquifers. Recharge rates estimated from tritium activities and water table fluctuations reflect those following the initial land clearing. Recharge rates estimated using water table fluctuations (15 to 500 mm yr(-1)) are significantly higher than those estimated using tritium renewal rates (0.01 to 89 mm yr(-1); typically < 14.0 mm yr(-1)) and approach the long-term average annual rainfall (similar to 640 mm yr(-1)). These recharge rates are unrealistic given the estimated evapotranspiration rates of 500 to 600 mm yr(-1) and the preservation of old groundwater in the catchments. It is likely that uncertainties in the specific yield results in the water table fluctuation method significantly overestimating recharge rates, and despite the land-use changes, the present-day recharge rates are relatively modest. These results are ultimately important for assessing the impacts of land-use changes and management of groundwater resources in semi-arid regions in Australia and elsewhere.
类型	Article
语种	英语
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000606805200002
WOS关键词	SOUTH-WESTERN VICTORIA ; MURRAY BASIN ; WATER-TABLE ; ENVIRONMENTAL ISOTOPES ; TREE PLANTATIONS ; DRYLAND SALINITY ; RESIDENCE TIMES ; C-14 ; TRITIUM ; CATCHMENT
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347940
作者单位	[Barua, Shovon; Cartwright, Ian] Monash Univ, Sch Earth Atmosphere & Environm, Clayton, Vic 3800, Australia; [Dresel, P. Evan] Agr Victoria, Dept Jobs Precincts & Reg, Bendigo, Vic 3554, Australia; [Daly, Edoardo] Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia
推荐引用方式 GB/T 7714	Barua, Shovon,Cartwright, Ian,Dresel, P. Evan,et al. Using multiple methods to investigate the effects of land-use changes on groundwater recharge in a semi-arid area[J],2021,25(1):89-104.
APA	Barua, Shovon,Cartwright, Ian,Dresel, P. Evan,&Daly, Edoardo.(2021).Using multiple methods to investigate the effects of land-use changes on groundwater recharge in a semi-arid area.HYDROLOGY AND EARTH SYSTEM SCIENCES,25(1),89-104.
MLA	Barua, Shovon,et al."Using multiple methods to investigate the effects of land-use changes on groundwater recharge in a semi-arid area".HYDROLOGY AND EARTH SYSTEM SCIENCES 25.1(2021):89-104.