Estimation of groundwater recharge from groundwater level fluctuations and baseflow rates around Mount Meru, Tanzania

Simple item page
dc.contributor.authorBennett, G.
dc.contributor.authorShemsanga, C.
dc.contributor.authorKervyn, M.
dc.contributor.authorWalraevens, K.
dc.date.accessioned2024-08-17T15:14:43Z
dc.date.available2024-08-17T15:14:43Z
dc.date.issued2024
dc.descriptionFull text article available at: https://doi.org/10.1016/j.gsd.2024.101133
dc.description.abstractEstimating groundwater recharge, direct runoff and baseflow is essential for understanding groundwater resource availability and managing groundwater systems. This study estimates groundwater recharge, direct runoff and baseflow on two slopes of Mount Meru: the northern and southern slopes using the water-table fluctuation (WTF) method and baseflow separation technique. High-frequency groundwater level measurements in five shallow wells over three hydrological years from 2018 to 2021 were analysed, while streamflow data in four gauging stations over nine hydrological years from 2010 to 2019 were used. The results of the WTF method show that the aquifer undergoes an average recharge of 544 mm/year and 90 mm/year on the south western and north-eastern slopes, respectively. On average, this recharge is about 53% and 13% of the annual rainfall on each slope. The baseflow results show that the aquifer on the south-eastern and north-western slopes recharges an average of 88 mm/year and 54 mm/year, respectively, which is on average about 12% and 7% of annual rainfall, respectively. In general, the high recharge on the south-western slope is attributed to the high rainfall, and the high hydraulic conductivity and high hydraulic diffusivity of the pyroclastic deposits compared to the debris avalanche deposits on the north-eastern slope. In addition, debris avalanche deposits show homogeneous recharge conditions, while pyroclastic deposits show heterogeneous recharge conditions. The WTF method can be useful to identify areas of preferential recharge so that preferential groundwater flow paths can be mapped for focused recharge of surface runoff during the rainy season.
dc.identifier.citationBennett, G., Shemsanga, C., Kervyn, M., & Walraevens, K. (2024). Estimation of groundwater recharge from groundwater level fluctuations and baseflow rates around Mount Meru, Tanzania. Groundwater for Sustainable Development, 25, 101133.
dc.identifier.doi10.1016/j.gsd.2024.101133
dc.identifier.otherhttps://doi.org/10.1016/j.gsd.2024.101133
dc.identifier.urihttps://repository.udom.ac.tz/handle/20.500.12661/4702
dc.language.isoen
dc.publisherElsevier BV
dc.relation.ispartofGroundwater for Sustainable Development
dc.subjectBaseflow separation
dc.subjectGroundwater recharge
dc.subjectMount Meru
dc.subjectTanzania
dc.subjectVolcanic aquifer system
dc.subjectWater-table fluctuation method
dc.titleEstimation of groundwater recharge from groundwater level fluctuations and baseflow rates around Mount Meru, Tanzania
dc.typejournal-article
oaire.citation.volume25
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
205 ABSTRACT.pdf
Size:
29.41 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles