Event-Driven Hyporheic Exchange during Single and Seasonal Rainfall in a Gaining Stream

Lu, Chengpeng1; Ji, Keyan1; Zhang, Yong2; Fleckenstein, Jan H.3; Zheng, Chunmiao4; Salsky, Kate2

2020-09-23

10.1007/s11269-020-02678-2

WATER RESOURCES MANAGEMENT   影响因子和分区

0920-4741

1573-1650

This study combined a reach-scale field survey and numerical modelling analysis to reveal the pattern of transient hyporheic exchange driven by rainfall events in the Zhongtian River, Southeast China. Field observations revealed hydrodynamic properties and flux variations in surface water (SW)/ groundwater (GW), suggesting that the regional groundwater recharged the study reach. A two-step numerical modelling procedure, including a hydraulic surface flow model and a groundwater flow model, was then used to interpret the transient hyporheic flow system. The hyporheic exchange exhibited strong temporal evolution in the study reach, as indicated by the rainfall event-driven hyporheic exchange. The reversal of the hydraulic gradient and transient hyporheic exchange were simulated using numerical simulation. Anisotropic hydraulic conductivity is the key to generating transient hyporheic exchange. A revised conceptual model was used to interpret the observed temporal patterns in hyporheic exchange. The seasonal rainfall events generate transient hyporheic exchange, and the pattern of transient hyporheic exchange indicates that transient hyporheic exchange appears only after an increased phase of the river stage but does not last long. The temporal pattern of hyporheic exchange can significantly affect the hydrodynamic exchange and the evolution of hydrology in the hyporheic zone for a gaining stream, and these results have important guiding significance for the comprehensive management of surface water and groundwater quantity and quality.

Hyporheic exchange Rainfall Transient process Hydraulic gradient reversal Gaining stream

SCI ; EI

英语

其他

National Natural Science Foundation of China[41931292][41971027] ; Fundamental Research Funds for the Central Universities[B200202025] ; Natural Science Foundation of Jiangsu Province[BK20181035] ; National Key R&D Program of China[2018YFC0407701]

Engineering ; Water Resources

Engineering, Civil ; Water Resources

WOS:000572329400001

SPRINGER

20203909243181

Groundwater ; Groundwater flow ; Stream flow ; Hydrodynamics ; Rivers ; Numerical models

Waterways:407.2 ; Precipitation:443.3 ; Groundwater:444.2 ; Fluid Flow, General:631.1 ; Mathematics:921

ENVIRONMENT/ECOLOGY

Web of Science

1.Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Jiangsu, Peoples R China
2.Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA
3.UFZ, Dept Hydrogeol, Helmholtz Ctr Environm Res, Leipzig, Germany
4.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Lu, Chengpeng,Ji, Keyan,Zhang, Yong,et al. Event-Driven Hyporheic Exchange during Single and Seasonal Rainfall in a Gaining Stream[J]. WATER RESOURCES MANAGEMENT,2020,34(15):4617-4631.

Lu, Chengpeng,Ji, Keyan,Zhang, Yong,Fleckenstein, Jan H.,Zheng, Chunmiao,&Salsky, Kate.(2020).Event-Driven Hyporheic Exchange during Single and Seasonal Rainfall in a Gaining Stream.WATER RESOURCES MANAGEMENT,34(15),4617-4631.

Lu, Chengpeng,et al."Event-Driven Hyporheic Exchange during Single and Seasonal Rainfall in a Gaining Stream".WATER RESOURCES MANAGEMENT 34.15(2020):4617-4631.