On The Transition Of Base Flow Recession From Early Stage To Late Stage

Keywords

Base flow recession; Early stage recession; Ephemeral stream; Late stage recession; Panola Mountain Research Watershed; Perennial stream

Abstract

This paper is focused on the transition of base flow recession from early stage to late stage. The volume flow rate that takes place when such a transition occurs is identified for each of the twenty-three recession events observed at the Panola Mountain Research Watershed (PMRW) in Georgia, USA, using a newly developed cumulative regression analysis method. Meanwhile, the flow at the watershed outlet, which was recorded when the discharge at the perennial stream head diminishes to zero, is identified for each recession event. As evidenced by a correlation coefficient of 0.90, these two characteristic flows are found to be highly correlated, suggesting a fundamental linkage between the transition of base flow recession from early stage to late stage and the drying up of ephemeral streams. During the early stage, the contraction of ephemeral streams largely controls the recession behavior, whereas in the late stage when perennial streams dominate the flowing streams, the contraction of flowing streams is minimal and groundwater hydraulics governs the recession behavior.

Publication Date

2-1-2016

Publication Title

Advances in Water Resources

Volume

88

Number of Pages

8-13

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.advwatres.2015.11.015

Socpus ID

84954097872 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84954097872

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