Analyses of groundwater storage change using GRACE satellite data in the Usutu-Mhlatuze drainage region, north-eastern South Africa

Abdullah, 2015, Effect of rainfall on groundwater level fluctuation in terengganu, Malays. J. Remote Sens. GIS, 4, 1 Abiy, 2017, Evaluation of watershed scale changes in groundwater and soil moisture storage with the application of GRACE satellite imagery data, Catena, 153, 50, 10.1016/j.catena.2017.01.036 Ahmed, 2014, The use of GRACE data to monitor natural and anthropogenic induced variations in water availability across Africa, Earth Sci. Rev., 1 Barath, 2015, Delineation of groundwater region 65: zululand coastal plain aquifer, KwaZulu-Natal. (MSc), 1 Bhanja, 2018, Estimating long-term groundwater storage and its controlling factors in Alberta, Canada, Hydrol. Earth Syst. Sci., 22, 6255 Bi, 2016, Comparison of soil moisture in GLDAS model simulations and in situ observations over the Tibetan Plateau, J. Geophys. Res.: Atmos., 121, 2658, 10.1002/2015JD024131 Blamey, 2018, The role of regional circulation features in regulating El Niño climate impacts over southern Africa: a comparison of the 2015/2016 drought with previous events, Int. J. Climatol., 38, 4276, 10.1002/joc.5668 Bordy, EM, Spelmam, S., Cole, DI, Mthembi, P. 2017. 293 Lithostratigraphy of the Pietermaritzburg Formation (Ecca Group, Karoo Supergroup), South Africa. Geological Society of South Africa. 1–11. Braune E. 2000. Towards comprehensive groundwater resource management in South Africa. In: Sililo et al. (eds.) Groundwater: Past Achievements and Future Challenges. Balkema, Rotterdam. CGIAR Consortium for Spatial Information (CGIAR-CSI). 2018. SRTM DEM Digital Elevation Database. 〈http://srtm.csi.cgiar.org/ Accessed [08/11/18]〉. Chen, 2020, Evaluation of Nine Sub-daily Soil Moisture Model Products over China Using High-Resolution In Situ Observations, J, 588, 125054 Cooley, 2019, Gravity recovery and climate experiment follow-on (GRACE-FO) level-3 data product user handbook, Jet. Propuls. Lab. Calif. Inst. Technol., 1 Demlie, 2015, Hydrogeological and hydrogeochemical characteristics of the Natal Group Sandstone, South Africa, Geol. Soc. South Afr., 33, 10.2113/gssajg.118.1.33 Dennis I. and Dennis R. 2009. Groundwater reserve determination study in the Mhlathuze Catchment. Institute for Groundwater Studies. Project No. WP9437/1. Department of Water and Sanitation (DWS). 2018. Evaporation data. Department of Water and Sanitation (DWS). 2020. The Lake Sibaya groundwater monitoring programme. Department of Water and Sanitation (DWS). 2020. The Lake Sibaya groundwater monitoring programme. Dietrich, 2018, Estimation of specific yield and its variability by electrical resistivity tomography, Water Resour. Res., 54, 8653, 10.1029/2018WR022938 Everson, CS, Scott-Shaw, BC, Kelbe, BE, Starke, A., Pearton T., Geldenhuys C., Vather T., Maguire M. 2019. Quantifying the water-use of dominant land uses in the Maputaland coastal plain. WRC Report No. TT 781/18. Famiglietti, 2010, Satellites measure recent rates of groundwater depletion in California’s Central Valley, Geophys. Res. Lett., 38, 1 Global Water Partnership (GWP). 2014. The links between land use and groundwater. Perspectives paper. 1–20. Groundwater Development Services. 1995. Hydrogeological characterization and mapping of the KwaZulu-Natal province Unit 3. 1–58. Hu, 2021, Temporal and Spatial Variations in the Terrestrial Water Storage across Central Asia Based on Multiple Satellite Datasets and Global Hydrological Models, J, 596, 126013 Huang, 2016, Mapping groundwater storage variations with GRACE: a case study in Alberta, Canada, Hydrogeol. J., 24, 1663, 10.1007/s10040-016-1412-0 Huang, 2019, Detection of large-scale groundwater storage variability over the karstic regions in Southwest China, J. Hydrol., 569, 409, 10.1016/j.jhydrol.2018.11.071 International Groundwater Resources Assessment Centre (IGRAC). 2013. Groundwater monitoring in the SADC region.1–19. Kelbe, B. and Germishuyse, T. 2010. Groundwater / surface water relationships with specific reference to Maputaland. Water Research Commission, WRC Report No 1168/1/10, Pretoria. Kelbe, 2016, Modelling water-table depth in a primary aquifer to identify potential wetland hydrogeomorphic settings on the northern Maputaland Coastal Plain, KwaZulu-Natal, South Africa, Hydrogeol. J., 24, 249, 10.1007/s10040-015-1350-2 Kelbe, BE, Germishuyse, T., Snyman, N., Fourie, I. 2001. Geohydrological Studies of the Primary Coastal Aquifer in Zululand. Water Research Commission Report No. 720/1. Water Research Commission, Pretoria, South Africa. Kendall, 1975 King, G. 1998. Hydrogeological map series of the Republic of South Africa: Durban and Vryheid. Landerer, 2010, Terrestrial water budget of the Eurasian pan‐Arctic from GRACE satellite measurements during 2003–2009, J. Geophys. Res., 115, 1 Legates, 1999, Evaluating the use of “goodness-of-fit” measures in hydrologic and hydroclimatic model validation, Water Resour. Res., 35, 233, 10.1029/1998WR900018 Lerner, 2009, The relationship between land use and groundwater resources and quality, Land Use Policy, 26, 265, 10.1016/j.landusepol.2009.09.005 Liesch, 2016, Comparison of GRACE data and groundwater levels for the assessment of groundwater depletion in Jordan, Hydrogeol. J., 24, 1563 Mann, 1945, Non-parametric test against trend, Econometrica, 13, 245, 10.2307/1907187 Martinelli and Associates. 1994. Characterization and mapping of the groundwater resources and hydrogeology Unit 11 of the KwaZulu-Natal province. 1–111. McCarthy, T. and Rubidge, B. 2005. The Story of Earth & Life. A Southern African Perspective on a 4.6-Billion-Year Journey. Cape Town: Struik Publishers/Johnnic Publishing Group. Geological Magazine. 145(4): 602–603. Melati, 2019, Estimates of groundwater depletion under extreme drought in the Brazilian semi-arid region using GRACE satellite data: application for a small-scale aquifer, Hydrogeol. J., 1, 14 Meyer, R. and Godfrey, L. 1995. KwaZulu-Natal Geohydrological mapping project Unit 7. Council for Scientific and Industrial Research (CSIR). CSIR Report No. EMAP-C 95024. Meyer R. and Godfrey L. 2003. Report on the geohydrology around Lake Sibaya, northern Zululand Coastal Plain, KwaZulu-Natal. Report No. ENV-P-C 2003–2003. Meyer, 2001, Geohydrological investigation and evaluation of the Zululand coastal aquifer. Mishra, 2014, Impact of land use change on groundwater ‐ a review, Adv. Water Resour. Prot., 2, 28 Moiwo, 2009, Comparison of GRACE with in-situ hydrological measurement data shows storage depletion in Hai River basin, Northern China, Water SA, 35, 663, 10.4314/wsa.v35i5.49192 Nanteza, J., de Linage, C.R., Thomas, B.F., Famiglietti, J.S., 2016. Monitoring groundwater storage changes in complex basement aquifers: an evaluation of the GRACE satellites over East Africa. Water Resource. Research. 〈https://doi.org/10.1002/2016WR018846〉. National Aeronautics and Space Administration (NASA). 2012. Mission Overview.〈https://www.nasa.gov/mission_pages/Grace/overview/index.html〉 [Accessed 20/03/2021]. Ndlovu, 2016, Hydrogeological characterization of the Kosi Bay Lakes system, north-eastern South Africa, Environ. Earth Sci., 75, 1, 10.1007/s12665-016-6164-6 Ndlovu, 2018, Statistical analysis of groundwater level variability across KwaZulu-Natal Province, South Africa, J. Environ. Earth Sci., 77, 1 Ndlovu, 2020, Assessment of meteorological drought and wet conditions using two drought indices across KwaZulu-Natal province, South Afr. Atmos., 11, 623 Ndlovu, 2019, Hydrogeological setting and hydrogeochemical characteristics of the Durban Metropolitan District, eastern South Africa, Geol. Soc. South Afr., 122, 299, 10.25131/sajg.122.0026 Neves, 2020, Evaluation of GRACE data for water resource management in Iberia: a case study of groundwater storage monitoring in the Algarve region, J. Hydrol.: Reg. Stud., 32, 1 Pathak, 2019, Trend analysis of groundwater levels and assessment of regional groundwater drought: Ghataprabha River Basin, India, Nat. Resour. Res., 28, 631, 10.1007/s11053-018-9417-0 Patle, 2015, Time series analysis of groundwater levels and projection of future trend, J. Geol. Soc. India, 85, 232, 10.1007/s12594-015-0209-4 Rahaman, 2019, Modeling of GRACE-derived groundwater information in the Colorado River Basin, Hydrology, 6, 1, 10.3390/hydrology6010019 Ramjeawon, 2020, Analysis of three decades of land cover changes in the Maputaland Coastal Plain, South Africa, Koedoe, 62, 1, 10.4102/koedoe.v62i1.1642 Ritter, 2013, Performance evaluation of hydrological models: statistical significance for reducing subjectivity in goodness-of-fit assessments, J. Hydrol., 480, 33, 10.1016/j.jhydrol.2012.12.004 Rodell, 2007, Estimating groundwater storage changes in the Mississippi River basin (USA) using GRACE, Hydrogeol. J., 1 Saggerson, 1983, The geology and structural relationships of the southern Lebombo volcanic and intrusive rocks, South Afr., 161 Scanlon, 2012, Ground referencing GRACE satellite estimates of groundwater storage changes in the California Central Valley, USA, Water Recourse Res., 48, 19 Schulze RE, Maharaj M., Lynch SD, Howe BJ and Melvil-Thomson B. 1997. South African Atlas of Agrohydrology and Climatology. Water Research Commission, Pretoria. Report TT82/96. Sen, 1968, Estimates of the regression coefficient based on Kendall's tau, J. Am. Stat. Assoc. 1968., 63, 1379, 10.1080/01621459.1968.10480934 Smithers, 2017, Modelling and water yield assessment of Lake Sibhayi, Water SA, 43, 480, 10.4314/wsa.v43i3.13 South African National Land-Cover (SANLC). 2018. South African National Land-Cover 2018 Report & Accuracy Assessment. DEA E1434 Land-Cover 1–39. South African Weather Service (SAWS). 2018.Climate data. Strassberg, 2007, Comparison of seasonal terrestrial water storage variations from GRACE with groundwater-level measurements from the High Plains Aquifer (USA), Geophys. Res. Lett., 34, 1, 10.1029/2007GL030139 Statistics. 2021. Directory of Statistical Analyses. https://www.statisticssolutions.com/ [Accessed 20/05/2021]. Swenson, 2007, Methods for inferring regional surface-mass anomalies from Gravity Recovery and Climate Experiment (GRACE) measurements of time-variable gravity, J. Geophys. Res., 107, 1 Tangdamrongsub, 2018, Evaluation of groundwater storage variations estimated from grace assimilation and state-of-the-art land surface models in Australia and the North China Plain, Remote Sens., 10, 1, 10.3390/rs10030483 du Toit, WH. 1999. Hydrogeological map series of the Republic of South Africa: Nelspruit. United Nations Educational, Scientific and Cultural Organization (UNESCO). 2020. Hydrogeological (groundwater) Mapping for ECOWAS region. 〈https://en.unesco.org/news〉 [Accessed: 18/12/2020/]. VSA Earth Science Consultants. 1995. KwaZulu-Natal groundwater characterization and hydrogeological mapping programme. Report on the groundwater resources and hydrogeology Unit 11. 1: 71. Weitz, 2014, Conceptual modeling of groundwater-surface water interactions in the Lake Sibayi Catchment, Eastern South Africa, J. Earth Sci., 99, 613 Weitz, 2015, Hydrogeological system analyses of the Lake Sibayi catchment, north-eastern South Africa, South Afr. J. Geol., 118, 107 Wiese DN Yuan DN, Boening C., Landerer FW, Watkins MM. 2019. JPL GRACE Mascon Ocean, Ice, and Hydrology Equivalent Water Height RL06 CRI Filtered Version 02. Woodford, AC and Chevallier, L. 2002. Hydrogeology of the Main Karoo Basin: current knowledge and future research needs. Water Research Commission WRC Report No. TT 179/02, Pretoria, RSA. Worthington, PF. 1978. Groundwater conditions in the Zululand coastal plain around Richards Bay. Council for Scientific and Industrial Research Report, FIS 182. Zhong, 2018, Groundwater depletion in the West Liaohe River Basin, China and its implications revealed by GRACE and in situ measurements, Remote Sens., 10, 1