Identifying hydrologic signatures associated with streamflow depletion caused by groundwater pumping

Groundwater pumping can reduce streamflow in nearby waterways (‘streamflow depletion’), a process which must be accounted for in integrated management of surface and groundwater resources. However, causal identification of streamflow depletion from hydrographs alone is challenging because pumping im...

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Vydáno v:Hydrological processes Ročník 37; číslo 4
Hlavní autoři: Lapides, Dana A., Zipper, Sam, Hammond, John C.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Hoboken, USA John Wiley & Sons, Inc 01.04.2023
Wiley Subscription Services, Inc
Wiley Blackwell (John Wiley & Sons)
Témata:
anthropogenic impacts
Depletion
Groundwater
Groundwater depletion
Groundwater resources
hydrograph
Hydrographs
Hydrologic processes
hydrologic signatures
Hydrology
Indicators
Low flow
Pumping
Signatures
Stream discharge
Stream flow
Streamflow depletion
Streams
stream‐aquifer interactions
Water resources
water resources management
Waterways
ISSN:0885-6087, 1099-1085
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Shrnutí:Groundwater pumping can reduce streamflow in nearby waterways (‘streamflow depletion’), a process which must be accounted for in integrated management of surface and groundwater resources. However, causal identification of streamflow depletion from hydrographs alone is challenging because pumping impacts are masked by other drivers of hydrologic variability. To identify potential indicators of streamflow depletion, we used synthetic hydrographs and an analytical streamflow depletion model to assess potential pumping impacts on specific hydrograph characteristics (‘hydrologic signatures’) for 215 streamgages spanning the conterminous United States (CONUS). We found that streamflow depletion commonly impacts signatures associated with seasonal and annual low flows and low flow recessions. The largest impacts occurred during dry years, suggesting streamflow depletion may be evident in dry years even where impacts are unmeasurable in wet years. Random forest models indicated that streamflow depletion could significantly impact Annual, Summer, and Fall signatures in most streams. Our finding that multiple hydrologic signatures are consistently responsive to streamflow depletion across CONUS suggests that the underlying hydrological processes linking pumping to streamflow reductions are consistent across diverse settings, information that will aid in identifying indicators of streamflow depletion from streamflow hydrographs. Groundwater pumping can reduce streamflow in nearby waterways. Hydrologic signatures related to Annual, Summer, and Fall low flows typically respond to streamflow depletion, particularly in dry years.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
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USDOE
ISSN:0885-6087
1099-1085
DOI:10.1002/hyp.14877