Geological permeability controls streamflow generation in a remote, ungauged, semi-arid drainage system

Study region: A semi-arid drainage system overlying a thick (12 km) sedimentary sequence on the Dampier Peninsula in northwestern Australia. Study focus: In this study we combine aerial geophysics, geological mapping, hydrometry and hydrochemistry with aerial image analysis and stream mass balance m...

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Autores principales:	Sarah A. Bourke, Bradley Degens, Josephine Searle, Thiaggo de Castro Tayer, Jasmin Rothery
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Ephemeral stream Intermittent river Non-perennial streams Spring mechanisms Surface water - groundwater interaction Physical geography GB3-5030 Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/71b863f944fc4e298a002ee5c491c747
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id	oai:doaj.org-article:71b863f944fc4e298a002ee5c491c747
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spelling	oai:doaj.org-article:71b863f944fc4e298a002ee5c491c7472021-12-02T05:01:39ZGeological permeability controls streamflow generation in a remote, ungauged, semi-arid drainage system2214-581810.1016/j.ejrh.2021.100956https://doaj.org/article/71b863f944fc4e298a002ee5c491c7472021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214581821001853https://doaj.org/toc/2214-5818Study region: A semi-arid drainage system overlying a thick (12 km) sedimentary sequence on the Dampier Peninsula in northwestern Australia. Study focus: In this study we combine aerial geophysics, geological mapping, hydrometry and hydrochemistry with aerial image analysis and stream mass balance modeling to delineate the key hydrogeological structures and processes that control streamflow generation within a remote ungauged semi-arid watershed. New hydrological insights for the region: Four distinct processes of streamflow generation were identified, each dependent on the spatial distribution of lithological permeability; (1) ephemeral rainfall runoff over low-permeability surface lithologies, (2) intermittent flow generated by seasonal groundwater discharge from the unconfined aquifer above a newly mapped clay layer, (3) persistent flow from contact springs via interbedded high- and low-permeability layers, and (4) perennial flow associated with regional groundwater discharge at headwater springs. This study highlights the importance of geological permeability and the resultant hydrogeological processes as controls on streamflow generation, particularly in low-relief and arid regions where topography is less likely to determine the distribution of streamflow.Sarah A. BourkeBradley DegensJosephine SearleThiaggo de Castro TayerJasmin RotheryElsevierarticleEphemeral streamIntermittent riverNon-perennial streamsSpring mechanismsSurface water - groundwater interactionPhysical geographyGB3-5030GeologyQE1-996.5ENJournal of Hydrology: Regional Studies, Vol 38, Iss , Pp 100956- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ephemeral stream Intermittent river Non-perennial streams Spring mechanisms Surface water - groundwater interaction Physical geography GB3-5030 Geology QE1-996.5
spellingShingle	Ephemeral stream Intermittent river Non-perennial streams Spring mechanisms Surface water - groundwater interaction Physical geography GB3-5030 Geology QE1-996.5 Sarah A. Bourke Bradley Degens Josephine Searle Thiaggo de Castro Tayer Jasmin Rothery Geological permeability controls streamflow generation in a remote, ungauged, semi-arid drainage system
description	Study region: A semi-arid drainage system overlying a thick (12 km) sedimentary sequence on the Dampier Peninsula in northwestern Australia. Study focus: In this study we combine aerial geophysics, geological mapping, hydrometry and hydrochemistry with aerial image analysis and stream mass balance modeling to delineate the key hydrogeological structures and processes that control streamflow generation within a remote ungauged semi-arid watershed. New hydrological insights for the region: Four distinct processes of streamflow generation were identified, each dependent on the spatial distribution of lithological permeability; (1) ephemeral rainfall runoff over low-permeability surface lithologies, (2) intermittent flow generated by seasonal groundwater discharge from the unconfined aquifer above a newly mapped clay layer, (3) persistent flow from contact springs via interbedded high- and low-permeability layers, and (4) perennial flow associated with regional groundwater discharge at headwater springs. This study highlights the importance of geological permeability and the resultant hydrogeological processes as controls on streamflow generation, particularly in low-relief and arid regions where topography is less likely to determine the distribution of streamflow.
format	article
author	Sarah A. Bourke Bradley Degens Josephine Searle Thiaggo de Castro Tayer Jasmin Rothery
author_facet	Sarah A. Bourke Bradley Degens Josephine Searle Thiaggo de Castro Tayer Jasmin Rothery
author_sort	Sarah A. Bourke
title	Geological permeability controls streamflow generation in a remote, ungauged, semi-arid drainage system
title_short	Geological permeability controls streamflow generation in a remote, ungauged, semi-arid drainage system
title_full	Geological permeability controls streamflow generation in a remote, ungauged, semi-arid drainage system
title_fullStr	Geological permeability controls streamflow generation in a remote, ungauged, semi-arid drainage system
title_full_unstemmed	Geological permeability controls streamflow generation in a remote, ungauged, semi-arid drainage system
title_sort	geological permeability controls streamflow generation in a remote, ungauged, semi-arid drainage system
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/71b863f944fc4e298a002ee5c491c747
work_keys_str_mv	AT sarahabourke geologicalpermeabilitycontrolsstreamflowgenerationinaremoteungaugedsemiariddrainagesystem AT bradleydegens geologicalpermeabilitycontrolsstreamflowgenerationinaremoteungaugedsemiariddrainagesystem AT josephinesearle geologicalpermeabilitycontrolsstreamflowgenerationinaremoteungaugedsemiariddrainagesystem AT thiaggodecastrotayer geologicalpermeabilitycontrolsstreamflowgenerationinaremoteungaugedsemiariddrainagesystem AT jasminrothery geologicalpermeabilitycontrolsstreamflowgenerationinaremoteungaugedsemiariddrainagesystem
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Geological permeability controls streamflow generation in a remote, ungauged, semi-arid drainage system

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