Digital filter baseflow separation method based on a master recession curve

ZHOU Xing; SHEN Chen; NI Guangheng; HU Hongchang

doi:10.16511/j.cnki.qhdxxb.2017.26.016

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Journal of Tsinghua University(Science and Technology) ›› 2017, Vol. 57 ›› Issue (3) : 318-323,330. DOI: 10.16511/j.cnki.qhdxxb.2017.26.016

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Digital filter baseflow separation method based on a master recession curve

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Abstract

Baseflow separation is essential in hydrology, water resources and water ecology. This study compares several baseflow separation methods with a digital filter baseflow separation method based on a master recession curve then developed to reduce the parameter uncertainty. A study of the Nu river in China shows that this digital filter method gives smoother baseflows than the BFI method and the HYSEP method; however, it is sensitive to model the parameters. Reasonable baseflows were obtained by using a recession curve to determine the digital filter parameters. The results show that the baseflow in the Nu River accounts for 39 to 55 percent of the total runoff in different sub-basins and that the inter-annual variation of the baseflow is relatively small.

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baseflow / digital filter / recession curve

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ZHOU Xing, SHEN Chen, NI Guangheng, HU Hongchang. Digital filter baseflow separation method based on a master recession curve[J]. Journal of Tsinghua University(Science and Technology). 2017, 57(3): 318-323,330 https://doi.org/10.16511/j.cnki.qhdxxb.2017.26.016

References

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