Fractal Behaviors of Hydraulic Head and Surface Runoff of the Nested Groundwater Flow Systems in Response to Rainfall Fluctuations

Zhang, Xiaolang1,2; Li, Hailong2; Jiao, Jiu Jimmy1; Luo, Xin1; Kuang, Xingxing2; Mao, Rong1; Hu, Wenli1

2022-01-28

10.1029/2021GL093784

GEOPHYSICAL RESEARCH LETTERS   影响因子和分区

0094-8276

1944-8007

The responses of the nested groundwater flow systems (NGFS) to rainfall fluctuations and the impacts of the NGFS on surface runoff are explored using a fully coupled variably saturated groundwater-surface water model in conjunction with spectral analysis. Numerical experiments are designed to investigate the fractal behaviors of hydraulic head and surface runoff in different scenarios. The results show that the inlets, outlets, and flow patterns of the sub-systems of NGFS can change with rainfall. The scaling-exponent, defined as the slope of the power spectra of the fluctuations of hydraulic head or runoff, is used to depict the fractal behaviors. The scaling-exponent of the hydraulic head is highly variable within the unsaturated zone and local flow systems but remains constant within the intermediate and regional systems. Whether the scaling-exponent of surface runoff exhibits a linear relation with the watershed size depends on the proportion of baseflow in the runoff.

nested groundwater flow systems systems surface runoff hydraulic head transient-state conditions fractal behavior

SCI ; EI

英语

其他

National Natural Science Foundation of China[41572208,91747204] ; Research Grants Council of Hong Kong["HKU 17304815",17307620]

Geology

Geosciences, Multidisciplinary

WOS:000751642800033

AMER GEOPHYSICAL UNION

20220511571365

Fractals ; Groundwater ; Groundwater flow ; Runoff ; Scaling laws ; Spectrum analysis

Flood Control:442.1 ; Precipitation:443.3 ; Surface Water:444.1 ; Groundwater:444.2 ; Fluid Flow, General:631.1 ; Mathematics:921 ; Systems Science:961

GEOSCIENCES

Web of Science

1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China

Zhang, Xiaolang,Li, Hailong,Jiao, Jiu Jimmy,et al. Fractal Behaviors of Hydraulic Head and Surface Runoff of the Nested Groundwater Flow Systems in Response to Rainfall Fluctuations[J]. GEOPHYSICAL RESEARCH LETTERS,2022,49(2).

Zhang, Xiaolang.,Li, Hailong.,Jiao, Jiu Jimmy.,Luo, Xin.,Kuang, Xingxing.,...&Hu, Wenli.(2022).Fractal Behaviors of Hydraulic Head and Surface Runoff of the Nested Groundwater Flow Systems in Response to Rainfall Fluctuations.GEOPHYSICAL RESEARCH LETTERS,49(2).

Zhang, Xiaolang,et al."Fractal Behaviors of Hydraulic Head and Surface Runoff of the Nested Groundwater Flow Systems in Response to Rainfall Fluctuations".GEOPHYSICAL RESEARCH LETTERS 49.2(2022).