Open-Source Software Application for Hydrogeological Delineation of Potential Groundwater Recharge Zones in the Singida Semi-Arid, Fractured Aquifer, Central Tanzania
Open Access
- 17 May 2020
- Vol. 7 (2), 28
- https://doi.org/10.3390/hydrology7020028
Abstract
This study attempted to delineate and map potential groundwater recharge zones of the Singida, semi-arid, fractured crystalline basement aquifer using open source remote sensing and GIS software. Various thematic maps such as lithology/hydrogeology, soil, land-cover/use, slope, lineament density, drainage density and rainfall distribution were integrated in QGIS software. Vector input layers were rasterized and resampled using QGIS wrap projection function to make sure that the grid cells are of the same size. Reclassification using SAGA and GRASS reclass algorithms in QGIS was carried out to realign the factor classes in a consistent scale, and reclassification to a scale of 1 to 5 was carried out to harmonize the results. The study identified a number of potential areas for groundwater recharge, groundwater exploration, groundwater development and potential areas for artificial groundwater recharge. Potential groundwater recharge zones for the Singida semi-arid fractured aquifer are restricted to areas with high lineament density, cultivated areas, grassland and flat to gentle slopes. The potential of groundwater recharge is also observed in areas with low drainage density. The delineated zones provide a good understanding of the potential recharge zones, which are a starting point for recharge zone protection. This blended approach can be utilized for carrying out suitability analysis using the weighted overlay analysis approach. Areas designated good and very good are recommended for artificial recharging structures as an alternative technique for enhancing groundwater recharge through rainwater harvesting. This will help to augment groundwater storage in this semi-arid environment.Keywords
This publication has 43 references indexed in Scilit:
- Origin and residence time of shallow groundwater resources in Lagos coastal basin, south-west Nigeria: An isotopic approachHeliyon, 2018
- Delineation of potential groundwater recharge zones in the coastal area of north-eastern India using geoinformaticsSustainable Water Resources Management, 2017
- Evaluating the impacts of crop rotations on groundwater storage and recharge in an agricultural watershedAgricultural Water Management, 2016
- The global volume and distribution of modern groundwaterNature Geoscience, 2015
- Groundwater depletion in the United States (1900−2008)Scientific Investigations Report, 2013
- Classifying the water table at regional to continental scalesGeophysical Research Letters, 2011
- Groundwater use for irrigation – a global inventoryHydrology and Earth System Sciences, 2010
- Isotopic characterization of three groundwater recharge sources and inferences for selected aquifers in the upper Klamath Basin of Oregon and California, USAJournal of Hydrology, 2007
- Are Water Tables a Subdued Replica of the Topography?Groundwater, 2005
- Ground water potential in a semi-arid region of Andhra Pradesh - a geographical information system approachInternational Journal of Remote Sensing, 2000