An examination of the hydrological system of a sand dam during the dry season leading to water balances

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dc.contributor.authorQuinn, Ruth
dc.contributor.authorRushton, Kenneth R.
dc.contributor.authorParker, Alison H.
dc.date.accessioned2019-09-27T09:06:17Z
dc.date.available2019-09-27T09:06:17Z
dc.date.issued2019-06-13
dc.description.abstractTo address water scarcity in semi-arid regions, rainfall and runoff need to be captured and stored locally before they are lost to the sea. This can be done using a sand dam which consists of a reinforced wall constructed during the dry season across a seasonal riverbed. However it is unclear whether their main utility is to store water in the sand that is also trapped behind them, or to facilitate aquifer recharge. This paper aims to answer this question by the calculation of a water balance in three sand dams in Kenya to quantify the amount of water transferred between the sand dam and the surrounding aquifer system. The components of the water balance were derived from extensive field monitoring. Water level monitoring in piezometers installed along the length of the sand deposits enabled calculation of the hydraulic gradient and hence the lateral flow between the different reaches of the sand dam. In one sand dam water was gained consistently through the dry season, in one it was lost, and in the third it was lost almost all the time except for the early dry season in the upper part of the trapped sand. In conclusion sand dams should not be treated as isolated water storage structures.en_UK
dc.identifier.citationQuinn R, Rushton K, Parker A. (2019) An examination of the hydrological system of a sand dam during the dry season leading to water balances. Journal of Hydrology X, Volume 4, July 2019, Article number 100035en_UK
dc.identifier.cris23819507
dc.identifier.issn2589-9155
dc.identifier.urihttps://doi.org/10.1016/j.hydroa.2019.100035
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14569
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectSand damen_UK
dc.subjectWater balanceen_UK
dc.subjectManaged aquifer rechargeen_UK
dc.subjectRiver beden_UK
dc.titleAn examination of the hydrological system of a sand dam during the dry season leading to water balancesen_UK
dc.typeArticleen_UK

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