The impacts of a linear wastewater reservoir on groundwater recharge and geochemical evolution in a semi-arid area of the Lake Baiyangdian watershed, North China Plain

2014 ◽  
Vol 482-483 ◽  
pp. 325-335 ◽  
Author(s):  
Shiqin Wang ◽  
Changyuan Tang ◽  
Xianfang Song ◽  
Qinxue Wang ◽  
Yinghua Zhang ◽  
...  
2021 ◽  
pp. e01701
Author(s):  
Xiaodong Ma ◽  
Zhuo Pang ◽  
Juying Wu ◽  
Guofang Zhang ◽  
Yunchuan Dai ◽  
...  

2019 ◽  
Vol 29 (6) ◽  
pp. 877-890 ◽  
Author(s):  
Leilei Min ◽  
Yongqing Qi ◽  
Yanjun Shen ◽  
Ping Wang ◽  
Shiqin Wang ◽  
...  

2016 ◽  
Vol 537 ◽  
pp. 260-270 ◽  
Author(s):  
Guoliang Cao ◽  
Bridget R. Scanlon ◽  
Dongmei Han ◽  
Chunmiao Zheng

2021 ◽  
Vol 25 (1) ◽  
pp. 89-104
Author(s):  
Shovon Barua ◽  
Ian Cartwright ◽  
P. Evan Dresel ◽  
Edoardo Daly

Abstract. 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 ∼180 years ago following European settlement, and a eucalypt plantation forest was subsequently established ∼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 (∼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.


2020 ◽  
Author(s):  
Shovon Barua ◽  
Ian Cartwright ◽  
P. Evan Dresel ◽  
Edoardo Daly

Abstract. Understanding recharge in semi-arid areas is important for the sustainable management of groundwater resources. This study focuses on estimating groundwater recharge rates and understanding the impacts of land-use changes on recharge in a semi-arid area. Two adjacent catchments in southeast Australia were cleared ~180 years ago following European settlement; in one of these catchments eucalypt plantation forest was subsequently established ~ 20 years ago. Chloride mass balance 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 represent recharge rates prior to land clearing, whereas the higher likely reflects recharge rates following initial land clearing. The low pre-land clearing recharge rates are consistent with the presence of groundwater that has residence times that are up to 24,700 years (calculated using radiocarbon) and the moderate to low hydraulic conductivities (0.31 to 0.002 m day−1) of the clay-rich aquifers. Recharge rates estimated from tritium activities and water table fluctuations reflect those following the initial land clearing. However, 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


Trees ◽  
2014 ◽  
Vol 29 (1) ◽  
pp. 87-96 ◽  
Author(s):  
Yuan Jiang ◽  
Bing-Qin Wang ◽  
Man-Yu Dong ◽  
Yong-Mei Huang ◽  
Ming-Chang Wang ◽  
...  

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