Analysis of temporal variation and scaling of hydrological variables based on a numerical model of the Sagehen Creek watershed

Yang, Chen1; Zhang, You-Kuan3; Liang, Xiuyu2

2018-02

10.1007/s00477-017-1421-0

STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT   影响因子和分区

1436-3240

1436-3259

Temporal variations of the main hydrological variables over 16 years were systematically investigated based on the results from an integrated hydrological modeling at the Sagehen Creek watershed in northern Sierra Nevada. Temporal scaling of these variables and damping effects of the hydrological system as well as its subsystems, i.e., the land surface, unsaturated zone, and saturated zone, were analyzed with spectral analyses. It was found that the hydrological system may act as a cascade of hierarchical fractal filters which sequentially transfer a non-fractal or less correlated fractal hydrological signal to a more correlated fractal signal. The temporal scaling of simulated infiltration (SI), simulated actual evapotranspiration (SET), simulated recharge (SR), measured baseflow (MBF), measured streamflow (MSF) exist and the temporal autocorrelation of these variables increase as water moves through the system. The degree of the damping effect of the subsystems is different and is strongest in the unsaturated zone compared with that of the land surface and saturated zone. The temporal scaling of the simulated groundwater levels (Sh) also exists and is strongly affected by the river: the temporal autocorrelation of Sh near the river is similar to that of the river stage fluctuations and increases away from the river. There is a break in the temporal scaling of Sh near the river at low frequencies due to the effect of the river. Temporal variations of the simulated soil moisture (S theta) is more complicated: the value of the scaling exponent (beta) for S theta increases with depth as water moves downwards and its high-frequency fluctuations are damped by the unsaturated zone. The temporal fluctuations of measured precipitation and SI are fractional Gaussian noise, those of SET, SR, MBF, and MSF are fractional Brownian motion (fBm), and those of Sh away from the river are 2nd-order fBm based on the values of beta obtained in this study.

Temporal variations Scaling Damping effect Hydrological system

SCI ; EI

英语

其他

program "The Social Development-Sicence & Technology Demostration Projects" - Department of Science and Technology of Jiangsu Province[BE2015708]

Engineering ; Environmental Sciences & Ecology ; Mathematics ; Water Resources

Engineering, Environmental ; Engineering, Civil ; Environmental Sciences ; Statistics & Probability ; Water Resources

WOS:000425109900004

SPRINGER

20171803619034

Autocorrelation ; Brownian movement ; Damping ; Fractals ; Groundwater ; Rivers ; Soil moisture ; Spectrum analysis ; Surface measurement ; Watersheds

Surface Water:444.1 ; Groundwater:444.2 ; Soils and Soil Mechanics:483.1 ; Colloid Chemistry:801.3 ; Mathematics:921 ; Mechanics:931.1 ; Mechanical Variables Measurements:943.2

ENGINEERING

Web of Science

1.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Hubei, Peoples R China
2.Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China
3.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Yang, Chen,Zhang, You-Kuan,Liang, Xiuyu. Analysis of temporal variation and scaling of hydrological variables based on a numerical model of the Sagehen Creek watershed[J]. STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT,2018,32(2):357-368.

Yang, Chen,Zhang, You-Kuan,&Liang, Xiuyu.(2018).Analysis of temporal variation and scaling of hydrological variables based on a numerical model of the Sagehen Creek watershed.STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT,32(2),357-368.

Yang, Chen,et al."Analysis of temporal variation and scaling of hydrological variables based on a numerical model of the Sagehen Creek watershed".STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT 32.2(2018):357-368.