Cross‐Validating Hydromechanical Models and Tracer Test Assessments of Hyporheic Exchange Flow in Streams With Different Hydromorphological Characteristics

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Fältnamn	Indikatorer	Metadata
000		04004naa a2200409 4500
001		oai:DiVA.org:kth-305944
003		SwePub
008		211210s2021 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3059442 URI
024	7	a https://doi.org/10.1029/2021wr0302482 DOI
040		a (SwePub)kth
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Morén, Idau KTH,Resurser, energi och infrastruktur4 aut0 (Swepub:kth)u1nhz0ij
245	1 0	a Cross‐Validating Hydromechanical Models and Tracer Test Assessments of Hyporheic Exchange Flow in Streams With Different Hydromorphological Characteristics
264		c 2021-12-08
264	1	b American Geophysical Union (AGU),c 2021
338		a print2 rdacarrier
500		a QC 20211221
520		a Hyporheic exchange flow (HEF) can generally be quantified through two different approaches. The first approach, which is deductive, entails physically based models, supported with relevant observations. The second approach includes inductive assessments of stream tracer tests using solute transport models, which provide a useful mathematical framework that allows for upscaling of results, but included parameters often have a vague physical base, which limits the possibilities of generalizing results using independent hydromorphological observations. To better understand how the physical basis of HEF-quantifying parameters relates to stream hydromorphology at different spatial scales, we cross-validated the results from (a) tracer test assessments using a 1D solute transport model that accounts for HEF and (b) an independent hydromechanical model that represents HEF driven by multiscale pressure gradients along the streambed interface. To parameterize the models, topographical surveys, tracer tests, and streambed hydraulic conductivity measurements were performed in 10 stream reaches, differing in terms of geomorphology, slope, and discharge. The results show that the models were cross-validated in terms of the average exchange velocity, providing a plausible physical explanation for this parameter in small alluvial streams with low discharges, shallow depth, and moderate slopes. However, the hydromechanical model generally resulted in wider residence time distributions and occasionally higher average residence times compared to the tracer test assessments. From the cross-validated multiscale hydromechanical model, we learned that water surface profile variations were the main drivers of HEF in all investigated streams and that spatial scales between 20 cm and 5 m dominated the estimated HEF velocity.
650	7	a TEKNIK OCH TEKNOLOGIERx Naturresursteknikx Havs- och vattendragsteknik0 (SwePub)207062 hsv//swe
650	7	a ENGINEERING AND TECHNOLOGYx Environmental Engineeringx Ocean and River Engineering0 (SwePub)207062 hsv//eng
650	7	a NATURVETENSKAPx Geovetenskap och miljövetenskapx Oceanografi, hydrologi och vattenresurser0 (SwePub)105092 hsv//swe
650	7	a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Oceanography, Hydrology and Water Resources0 (SwePub)105092 hsv//eng
653		a Water Science and Technology
653		a Hydraulic and Hydrologic Engineering
653		a Hydraulik och teknisk hydrologi
700	1	a Riml, Joakim,d 1979-u KTH,Resurser, energi och infrastruktur4 aut0 (Swepub:kth)u1265deb
700	1	a Wörman, Andersu KTH,Resurser, energi och infrastruktur4 aut0 (Swepub:kth)u1lfcm16
710	2	a KTHb Resurser, energi och infrastruktur4 org
773	0	t Water resources researchd : American Geophysical Union (AGU)g 57:12q 57:12x 0043-1397x 1944-7973
856	4	u https://doi.org/10.1029/2021wr030248y Fulltext
856	4	u https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2021WR030248
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-305944
856	4 8	u https://doi.org/10.1029/2021wr030248

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Av författaren/redakt...: Morén, Ida; Riml, Joakim, 19 ...; Wörman, Anders

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