Diagnosing the subsurface buffer on ground-surface temperature under long-term groundwater pumping: effects of the bottom boundary condition placement

Yang, Chen1; Zheng, Tingting2,3; Huang, Kun4; Lu, Zheng5; Zhang, You-Kuan6,7; Yang, Xiaofan5

2021

10.1007/s10040-020-02287-8

HYDROGEOLOGY JOURNAL   影响因子和分区

1431-2174

1435-0157

The terrestrial subsurface acts as a buffer in regulating land-surface water and energy processes. In integrated modeling with land-surface models, the regulating capacity of the subsurface is largely determined by the bottom boundary condition placement (BBCP). However, the sensitivity of land-surface processes to BBCP in Earth system modeling and integrated hydrologic modeling under conditions of human disturbance has not been investigated. In the research reported here, numerical experiments by integrated hydrologic modeling in the Little Washita Basin (Oklahoma, USA) were conducted to study the behavior of the subsurface buffer in regulating ground-surface temperature (GST) under long-term groundwater pumping and the role of BBCP in modeling such processes. Results reveal that long-term groundwater pumping weakens the subsurface buffer and leads to a warming trend. Under either sustainable or unsustainable pumping scenarios, the increase in GST exhibits temporal nonlinearity by rapidly increasing in the beginning and gradually achieving a dynamic equilibrium. It is also found that the subsurface buffer with deeper BBCP is more effective on damping the nonlinearity and the amplitude of the increase in GST. In addition, variations in GST are more sensitive to BBCP under pumping than in the natural state due to decreased thermal properties. In summary, this study diagnoses the subsurface buffer on variations of GST with the role of BBCP in integrated modeling under long-term groundwater pumping. These results are expected to have important implications on integrated modeling with land-surface models in areas of groundwater depletion worldwide.

Bottom boundary condition placement Land surface model Groundwater exploration Ground surface temperature Numerical modeling

SCI

英语

其他

National Natural Science Foundation of China[41807198] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20100104]

Geology ; Water Resources

Geosciences, Multidisciplinary ; Water Resources

WOS:000608941600001

SPRINGER

GEOSCIENCES

Web of Science

1.Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA
2.801 Inst Hydrogeol & Engn Geol, Shandong Prov Bur Geol & Mineral Resources, Jinan 250014, Peoples R China
3.Shandong Prov Res Ctr Groundwater Environm Protec, Jinan 250014, Peoples R China
4.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Peoples R China
5.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China
6.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen 518055, Peoples R China
7.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen 518055, Peoples R China

Yang, Chen,Zheng, Tingting,Huang, Kun,et al. Diagnosing the subsurface buffer on ground-surface temperature under long-term groundwater pumping: effects of the bottom boundary condition placement[J]. HYDROGEOLOGY JOURNAL,2021,29(3).

Yang, Chen,Zheng, Tingting,Huang, Kun,Lu, Zheng,Zhang, You-Kuan,&Yang, Xiaofan.(2021).Diagnosing the subsurface buffer on ground-surface temperature under long-term groundwater pumping: effects of the bottom boundary condition placement.HYDROGEOLOGY JOURNAL,29(3).

Yang, Chen,et al."Diagnosing the subsurface buffer on ground-surface temperature under long-term groundwater pumping: effects of the bottom boundary condition placement".HYDROGEOLOGY JOURNAL 29.3(2021).