A distributed domain model coupling open channel flow and groundwater flow to quantify the impact of lateral hydrologic exchange on hydrograph

Wei, Song1,2; Zheng, Yi2,3; Liang, Xiuyu2,3; Tian, Yong2,3; Frame, Jonathan M.4; Zhang, Yong4

2022-08-01

10.1016/j.jhydrol.2022.128010

JOURNAL OF HYDROLOGY   Impact Factor & Quartile

0022-1694

1879-2707

Hydrologic exchange flows (HEFs) of river-aquifer systems are known to affect water flow, but the quantitative influences of lateral HEFs and the riparian zone's hydraulic conductivity (K) distribution on stream fluxes remain obscure under varying hydrologic conditions. To fill this knowledge gap, this study proposed a physical based, distributed domain, coupled (open channel and groundwater) flow model (DDCM) to quantify the effect of lateral HEFs on hydrograph characteristics, including especially the peak discharge and tailing decay which are practically important. Numerical experiments showed that (1) the interaction between the lateral HEFs and river hydrodynamics reduced the peak discharge and flood flow rates, (2) a heterogeneous K field of the riparian zone generated multi-rate HEFs (which then changed flow response) represented by the hydrographs with various declining rates (varying from exponential to power-law), significantly expanding the flow process, and (3) the probability density function of K also affected the tailing and peak of the hydrograph. A preliminary test showed that the DDCM captured the overall pattern of hydrographs observed from a catchment in the Wadi Ahin West, Oman. This study, therefore, provided a model-based quantification of the mechanisms and factors of the lateral HEFs affecting the hydrograph pattern in flood events, and further applications are needed to test the applicability of the DDCM in capturing real-world hydrographs affected by the lateral HEFs.

Lateral HEFs Distributed-domain coupling model Spatial heterogeneity Power-law decay Multi-rate flow

SCI ; EI

English

Corresponding

Shenzhen Science and Technology Innovation Commission[KCXFZ202002011006491] ; National Natural Science Foundation of Guangxi Province, China[2020GXNSFBA297038] ; National Natural Science Foundation of China[51961125203,41931292] ; Alabama Center of Excellence[GR28628]

Engineering ; Geology ; Water Resources

Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources

WOS:000811872900001

ELSEVIER

20222612266695

Aquifers ; Catchments ; Flood control ; Floods ; Groundwater flow ; Groundwater resources ; Probability density function ; Rivers

Flood Control:442.1 ; Groundwater:444.2 ; Fluid Flow, General:631.1 ; Accidents and Accident Prevention:914.1 ; Probability Theory:922.1

ENGINEERING

Web of Science

1.Guilin Univ Technol, Guangxi Key Lab Environm Pollut Control Theory & T, Guilin 541004, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Municipal Engn Lab Environm IoT Technol, Shenzhen 518055, Guangdong, Peoples R China
4.Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA

Wei, Song,Zheng, Yi,Liang, Xiuyu,et al. A distributed domain model coupling open channel flow and groundwater flow to quantify the impact of lateral hydrologic exchange on hydrograph[J]. JOURNAL OF HYDROLOGY,2022,611.

Wei, Song,Zheng, Yi,Liang, Xiuyu,Tian, Yong,Frame, Jonathan M.,&Zhang, Yong.(2022).A distributed domain model coupling open channel flow and groundwater flow to quantify the impact of lateral hydrologic exchange on hydrograph.JOURNAL OF HYDROLOGY,611.

Wei, Song,et al."A distributed domain model coupling open channel flow and groundwater flow to quantify the impact of lateral hydrologic exchange on hydrograph".JOURNAL OF HYDROLOGY 611(2022).