Identification and Scaling Behavior Assessment of the Dominant Hydrological Factors of Nitrate Concentrations in Streamflow

Gu, Xiufen1; Sun, HongGuang1; Tick, Geoffrey R.2; Lu, YueHan2; Zhang, Youkuan3; Zhang, Yong2; Schilling, Keith4

2020-06

10.1061/(ASCE)HE.1943-5584.0001934

JOURNAL OF HYDROLOGIC ENGINEERING   影响因子和分区

1084-0699

1943-5584

Nitrate-nitrogen (nitrate) pollution remains one of the most common causes of surface water quality degradation. Previous studies explored the fractal scaling behavior of controlling factors, but few studies investigated the change of scaling characteristics with time and the influence of a combination of factors on streamflow nitrate concentration (SFC). This study showed that a suite of hydrological factors impacting the SFC variations at multiple temporal scales can be determined using wavelet coherence analysis. The scaling behavior for controlling factors was evaluated using multifractal detrended fluctuation analysis. Results showed that streamflow and base flow exhibited persistent behavior, whereas the precipitation exhibited variable scaling behaviors that contributed to significant SFC fluctuations at multiple scales. Streamflow had substantial control on the SFC fluctuations when the time scale was shorter than 90 days. The combination of precipitation and streamflow formed the dominant processes impacting SFC at larger temporal scales (>90 days). These results provide an effective way to identify the factors influencing SFC variations across scales and predict the temporal evolution of SFC.

Nitrate concentration Hydrological factors Multiple scales Multiple wavelet coherence Multifractal detrended fluctuation analysis

SCI ; EI

英语

其他

National Natural Science Foundation of China[41931292]

Engineering ; Environmental Sciences & Ecology ; Water Resources

Engineering, Civil ; Environmental Sciences ; Water Resources

WOS:000527795100012

ASCE-AMER SOC CIVIL ENGINEERS

20201608421773

Factor analysis ; Fractals ; River pollution ; Stream flow ; Surface waters ; Nitrates

Waterways:407.2 ; Surface Water:444.1 ; Water Analysis:445.2 ; Water Pollution:453 ; Fluid Flow, General:631.1 ; Inorganic Compounds:804.2 ; Mathematics:921 ; Mathematical Statistics:922.2

ENGINEERING

Web of Science

1.Hohai Univ, Coll Mech & Mat, Key Lab Hydrol Water Resources & Hydraul Engn, Nanjing 210098, Jiangsu, Peoples R China
2.Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA
3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Ground Water Pollut, Shenzhen 518055, Peoples R China
4.Univ Iowa, Iowa Geol Survey, 109 Trowbridge Hall, Iowa City, IA 52242 USA

Gu, Xiufen,Sun, HongGuang,Tick, Geoffrey R.,et al. Identification and Scaling Behavior Assessment of the Dominant Hydrological Factors of Nitrate Concentrations in Streamflow[J]. JOURNAL OF HYDROLOGIC ENGINEERING,2020,25(6).

Gu, Xiufen.,Sun, HongGuang.,Tick, Geoffrey R..,Lu, YueHan.,Zhang, Youkuan.,...&Schilling, Keith.(2020).Identification and Scaling Behavior Assessment of the Dominant Hydrological Factors of Nitrate Concentrations in Streamflow.JOURNAL OF HYDROLOGIC ENGINEERING,25(6).

Gu, Xiufen,et al."Identification and Scaling Behavior Assessment of the Dominant Hydrological Factors of Nitrate Concentrations in Streamflow".JOURNAL OF HYDROLOGIC ENGINEERING 25.6(2020).