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Author : L. Wang
Publisher :
ISBN 13 :
Total Pages : 31 pages
Book Rating : 4.:/5 (731 download)
Download or read book A literature review of recharge estimation and groundwater resource assessment in Africa written by L. Wang and published by . This book was released on 2010 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Timothy O. Williams
Publisher : Routledge
ISBN 13 : 131747953X
Total Pages : 376 pages
Book Rating : 4.3/5 (174 download)
Download or read book The Volta River Basin written by Timothy O. Williams and published by Routledge. This book was released on 2016-09-19 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Volta River Basin (VRB) is an important transboundary basin in West Africa that covers approximately 410,000 square kilometres across six countries: Benin, Burkina Faso, Côte d’Ivoire, Ghana, Mali and Togo. Its natural resources sustain the livelihoods of its population and contribute to economic development. This book provides a comprehensive, interdisciplinary review and assessment of the issues and challenges faced. The authors provide a science-based assessment of current and future scenarios of water availability, the demands of key sectors, including agriculture and hydropower, and the environment under changing demographic, economic, social and climatic conditions. They also identify solutions and strategies that will allow available water resources to be sustainably used to improve agricultural productivity, food security and economic growth in the VRB. Overall, the work examines from a multidisciplinary and multi-stakeholder perspective the solutions and strategies to improve the use of water and other natural resources in the VRB to achieve enhanced food security, livelihoods and economic growth.
Author : D. Mudimbu
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book Literature Review : Assessing Groundwater Recharge Estimates Under Conventional Tillage and Conservation Agriculture written by D. Mudimbu and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lebogang Malefane
Publisher : GRIN Verlag
ISBN 13 : 3346226638
Total Pages : 174 pages
Book Rating : 4.3/5 (462 download)
Download or read book Groundwater Resource Assessment for Town Water Supply in South Africa. The Case of Steynsrus in the Free State Province written by Lebogang Malefane and published by GRIN Verlag. This book was released on 2020-08-17 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2016 in the subject Geography / Earth Science - Geology, Mineralogy, Soil Science, grade: 3.4, University of the Free State (Institute for Groundwater Studies), course: Geohydrological Masters Programme, language: English, abstract: Groundwater resource assessment aims to obtain fundamental data and information needed to describe the hydraulic and chemical parameters in order to estimate the available groundwater resource which is suitable for drinking. This study was undertaken with the purpose of determining and estimating the groundwater occurrence, groundwater flow parameters, groundwater quality and storage in typical Karoo Main Basin aquifers such as in the Steynsrus study area in South Africa. The field investigations were designed to define and determine the sustainable yields and the properties of the aquifers and the exploitable volumes. The research places emphasis on the appropriate tools and their applications in order to understand the local aquifers so as to optimise the groundwater exploration for town water use and to determine the future water use. The geophysical surveying methods, particularly the magnetic method, were utilised to investigate and determine borehole drilling targets, and to locate groundwater potential structures, which are often associated with high borehole yields. The quality of the magnetic data utilised for drilling by the external consultant was critically evaluated and was found to be ‘bad data’. Percussion drilling played an important role in providing geological subsurface information; in particular locations of fractures which are often associated with favourable groundwater flow were identified. Seventeen (17) boreholes were drilled in the whole project, seven (7) of the boreholes were sited by magnetometer survey and interpretation, and ten (10) of the drilled boreholes were sited by geological mapping and map interpretation. Twelve of the drilled boreholes were declared ‘unsuccessful’ due to yielding a blow yield below 1.00 L/s; therefore these boreholes were not considered for aquifer pump testing. Blow yields of five (5) of the newly drilled boreholes were between 1.5 and 24 L/s. Based on these findings, the aquifers in the study were concluded to be a fractured system of alternating layers of sandstone and shale formations, characterised by the favourable groundwater flow characteristics at the dolerite fractures, and in some cases bedding plane fractures of sandstone formations. The study demonstrates the value in the methods and concepts applied in geohydrological studies to understand the local aquifer properties and in order to estimate the sustainable yields and the groundwater balance.
Author : I. Simmers
Publisher : Springer Science & Business Media
ISBN 13 : 9401577803
Total Pages : 503 pages
Book Rating : 4.4/5 (15 download)
Download or read book Estimation of Natural Groundwater Recharge written by I. Simmers and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: In view of the rapidly expanding urban, industrial and agri cultural water requirements in many areas and the normally associated critical unreliability of surface water supplies in arid and semi-arid zones, groundwater exploration and use is of fundamental importance for logical economic development. Two interrelated facets should be evident in all such groundwater projects : (a) definition of groundwater recharge mechanisms and characteristics for identified geological formations, in order to determine whether exploitation in the long-term involves 'mining' of an es sentially 'fossil' resource or withdrawal from a dynamic supply. A solution to this aspect is essential for development of a re source management policy: (b) determination of recharge variability in time and space to thus enable determination of total aquifer input and to quantify such practical aspects as 'minimum risk' waste disposal locations and artificial recharge potential via (e.g.) devegetation or engi neering works. However, current international developments relating to natural recharge indicate the following 'problems' ; no single comprehensive estimation technique can yet be iden tified from the spectrum of methods available; all are reported to give suspect results.
Author : Dipankar Saha
Publisher : Springer Nature
ISBN 13 : 9819987571
Total Pages : 432 pages
Book Rating : 4.8/5 (199 download)
Download or read book Managed Groundwater Recharge and Rainwater Harvesting written by Dipankar Saha and published by Springer Nature. This book was released on with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nicola Martin
Publisher :
ISBN 13 : 9783865378859
Total Pages : 168 pages
Book Rating : 4.3/5 (788 download)
Download or read book Development of a Water Balance for the Atankwidi Catchment, West Africa written by Nicola Martin and published by . This book was released on 2006 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stefan Schmutz
Publisher : Springer
ISBN 13 : 3319732501
Total Pages : 562 pages
Book Rating : 4.3/5 (197 download)
Download or read book Riverine Ecosystem Management written by Stefan Schmutz and published by Springer. This book was released on 2018-05-08 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book surveys the frontier of scientific river research and provides examples to guide management towards a sustainable future of riverine ecosystems. Principal structures and functions of the biogeosphere of rivers are explained; key threats are identified, and effective solutions for restoration and mitigation are provided. Rivers are among the most threatened ecosystems of the world. They increasingly suffer from pollution, water abstraction, river channelisation and damming. Fundamental knowledge of ecosystem structure and function is necessary to understand how human acitivities interfere with natural processes and which interventions are feasible to rectify this. Modern water legislation strives for sustainable water resource management and protection of important habitats and species. However, decision makers would benefit from more profound understanding of ecosystem degradation processes and of innovative methodologies and tools for efficient mitigation and restoration. The book provides best-practice examples of sustainable river management from on-site studies, European-wide analyses and case studies from other parts of the world. This book will be of interest to researchers in the field of aquatic ecology, river system functioning, conservation and restoration, to postgraduate students, to institutions involved in water management, and to water related industries.
Author : Ulf Mohrlok
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)
Download or read book Groundwater recharge estimation in case study cities written by Ulf Mohrlok and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Seifu Kebede
Publisher : Springer Science & Business Media
ISBN 13 : 3642303919
Total Pages : 283 pages
Book Rating : 4.6/5 (423 download)
Download or read book Groundwater in Ethiopia written by Seifu Kebede and published by Springer Science & Business Media. This book was released on 2012-08-01 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive description of groundwater resources in Ethiopia and its various dimensions (groundwater as resource, environmental functions, and socioeconomics). The prevailing knowledge of groundwater resources in Ethiopia (or elsewhere in Sub Saharan Africa) was based on geological and stratigraphic framework known nearly four decades ago (mainly 1960's and 70's). Thanks to the substantial geoscientific research since the 70's a new set of relevant geological/stratigrahpic data has been created that helps to re-define our understanding of groundwater resources in Africa as a whole and in Ethiopia in particular: a) For the first time the basement aquifer of Ethiopia has been described hydrogeologically based on genesis of regoliths (deep weathering and striping history); clear regional difference in groundwater potential is shown for the first time; comparative accounty has been given regarding groundwater occurrence in the generally low grade basement rocks of Ethiopia (Arabian Nubian shield) and high grade basement rocks of the rest of Africa. b) For the first time groundwater occurrence in multilayred sedimentary rocks account for spatial variation in degree of karstification; deformation history, and stratigraphy. c) The vast volcanic aquifers of Ethiopia which have previously classified based on their ages are now reclassified based on age, morphology (eg. groundwater in plateau volcanics, groundwater in shield volcanics) and aquifer structure. d) The loose alluvio lacustrine sediments which were known as least extensive in previous works based on areal cover are in fact shown to host the most voluminous groundwater resources in Ethiopia. These aquifers have now been described based on their geomorphology, extent, and genesis. The aim of this book is to use these newly created knowledge to redefine the understanding of groundwater resources in Ethiopia.
Author : Yongxin Xu
Publisher : CRC Press
ISBN 13 : 9781138111851
Total Pages : 282 pages
Book Rating : 4.1/5 (118 download)
Download or read book Sustainable Groundwater Resources in Africa written by Yongxin Xu and published by CRC Press. This book was released on 2017-09-12 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Empowering people, reducing poverty, improving livelihoods and promoting economic growth, while at the ensuring sustainable ecosystems, requires local, appropriate and widely replicable solutions. In the search for these, poor sanitation and poor water supply are major drivers in cycles of disease, poverty and powerlessness which avoid people in developing nations to escape poverty. Sustainable water supply is not only a matter of groundwater and sanitation-technical solutions, but as much implies tackling major issues concerning hydro-social and public health components. The African continent, has lagged behind other regions in achieving the Millennium Development Goals (MDG) in water supply and sanitation, and continues to be a much neglected water resource. This volume disseminates investigations and pointers towards achieving sustainable groundwater supplies in challenging local community environments across the African continent. The first part presents the search integrated water, sanitation, hygiene delivery and best implementation practice. The second part, through a variety of case studies, illustrates the current status and pitfalls that hydrogeologists experience and highlights the relevant challenges that especially Sub-Saharan Africa still faces in this battle. The chapters present the current situation, best practices, challenges identified and directions developed by the authors in their advancement towards comprehensive solutions. For anyone involved with the development of water supply and sanitation in developing countries.
Author : Guoliang Cao
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.:/5 (794 download)
Download or read book Recharge Estimation and Sustainability Assessment of Groundwater Resources in the North China Plain written by Guoliang Cao and published by . This book was released on 2011 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable use of groundwater resources requires a comprehensive understanding of the groundwater flow system, including recharge mechanisms and system dynamics to quantify future availability and variability of groundwater resources in response to climatic conditions (recharge) and human activities (pumping). This dissertation explores sustainability issues in the North China Plain (NCP), a region plagued by one of the worst groundwater overuse and depletion problems globally. The dissertation is organized as three closely related but self-contained papers. The first paper describes the development of a regional, three-dimensional groundwater flow model, and its application in investigating the overall flow dynamics of the groundwater system across the NCP under both predevelopment and post-development conditions. The output from the groundwater model provides estimates of groundwater depletion rates over the post-development period, which average about 4 km^3/yr. Mean annual groundwater recharge of the overall plain, as estimated through calibration of the groundwater model is ~120 mm, which is in reasonable agreement with previously reported values based on the regional water balance method. Groundwater storage depletion, as estimated from groundwater level fluctuation data and from the numerical simulation is highly correlated with variations in precipitation. The numerical model makes it possible to integrate the available hydrologic data, providing a comprehensive approach to evaluate sustainability of groundwater resources in the NCP. The results show a severe imbalance between groundwater recharge and groundwater extraction (the primary discharge). Finally, some strategies that have been conducted towards more sustainable groundwater management in the NCP are discussed. In the work discussed in the second paper, as a way of mitigating the uncertainty inherent in specifying groundwater recharge as a calibration parameter (as commonly done in regional groundwater modeling), a simplified vertical one-dimensional unsaturated zone flow model was coupled with the regional three-dimensional saturated zone flow model. This allows more realistic simulation of the recharge process at the interface between the unsaturated and saturated zones. Soil hydraulic parameters were estimated using pedotransfer functions. Simulation over 12 years (1993-2008) was performed across the NCP. Simulated mean annual recharge ranges from
Author : Yongxue Xu
Publisher :
ISBN 13 : 9789292200008
Total Pages : 207 pages
Book Rating : 4.2/5 ( download)
Download or read book Groundwater Recharge Estimation in Southern Africa written by Yongxue Xu and published by . This book was released on 2003 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : UNESCO
Publisher : UNESCO Publishing
ISBN 13 : 9231004883
Total Pages : 366 pages
Book Rating : 4.2/5 (31 download)
Download or read book Managing aquifer recharge written by UNESCO and published by UNESCO Publishing. This book was released on 2021-11-25 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Adla Jamil Khalaf
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (757 download)
Download or read book Spatial and Temporal Distribution of Groundwater Recharge in the West Bank Using Remote Sensing and GIS Techniques written by Adla Jamil Khalaf and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimating groundwater recharge to aquifer systems is a very important element in assessing the water resources of the West Bank. Of particular interest is the sustainable yield of the aquifers. Previous studies have developed analytical recharge models that are based on the long-term annual rainfall data. These models have been shown to be inadequate and changes over shorter periods, e.g. monthly estimates, must be known in order to study the temporal distribution of recharge. The approach used in this research integrates data derived from satellite images (e.g. land cover, evapotranspiration, rainfall, and digital elevation model) with hydrogeological data in a Geographic Information System (GIS) model to identify and map the surface recharge areas. The Surface Energy Balance Algorithm for Land (SEBAL) is applied to time series of remote sensing MODerate Resolution Imaging Spectroradiometer (MODIS) level 3 data of reflectance and surface temperature measurements to estimate monthly evapotranspiration; precipitation is derived from the monthly data sets of the Tropical Rainfall Measuring Mission (TRMM); runoff is given assumed values of 0.75 mm month-1 and 0.4 mm month-1 for the months of January and February, respectively. Recharge is quantified from November until March by applying the water balance method where evapotranspiration estimates and runoff are subtracted from precipitation. Results show good agreement between data reported in the literature and remote sensing-based analysis. Empirical models that are based on long term rainfall measurements suggest recharge values between 800 and 836 MCM yr-1 while the remote sensing based model results estimate recharge to be 700 MCM yr-1. The Western, North-Eastern, and Eastern Aquifer Basins receive 30%, 23%, and 47% of the total calculated recharge while percentages available in the literature provide 49%, 22%, and 29%, respectively. Discrepancies are mainly due to lack of field data, the overestimation of actual evapotranspiration, and underestimation of TRMM precipitation values. The recharge map indicates that the most effective groundwater recharge zones are located in the north and west of the area that is characterised by thick and well developed soil deposits, heavy vegetation, and a sub-humid climate with the potential of significant recharge occurring during the wet season. Some areas in the east include concentration of drainage and stream flows which increase the ability of to recharge the groundwater system. The least effective areas are in the south and south-west region that is more arid with much less recharge, mainly due to its isolated thin soil deposits. A sensitivity analysis was carried out to demonstrate the impact of land cover change on groundwater and natural recharge. The assessment involved the use of land covers of 1994 and 2004 with the same fixed parameters of evapotranspiration, precipitation, drainage, slope, soil, and geology. Results show a decrease in high and intermediate high recharge areas from 40.25 km2 and 2462.25 km2 in year 1994 to 15.5 km2 and 1994 km2 in 2004, respectively. This illustrates the extent of land cover/land use change influence on recharge and calls for integrated plans and strategies to preserve recharge at least at its current rates.
Author : Peter Dillon
Publisher : MDPI
ISBN 13 : 3039430424
Total Pages : 408 pages
Book Rating : 4.0/5 (394 download)
Download or read book Managed Aquifer Recharge for Water Resilience written by Peter Dillon and published by MDPI. This book was released on 2021-04-01 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a hard copy of the editorial and all the papers in a Special Issue of the peer-reviewed open access journal ‘Water’ on the theme ‘Managed Aquifer Recharge for Water Resilience’. Managed aquifer recharge (MAR) is the purposeful recharge of water to aquifers for subsequent recovery or environmental benefit. MAR is increasingly used to make water supplies resilient to drought, climate change and deteriorating water quality, and to protect ecosystems from declining groundwater levels. Global MAR has grown exponentially to 10 cu.km/year and will increase ten-fold within a few decades. Well informed hydrogeologists, engineers and water quality scientists are needed to ensure that this investment is effective in meeting increasingly pressing needs. This compilation contains lessons from many examples of existing projects, including several national and continental summaries. It also addresses the elements essential for identifying and advancing projects such as mapping aquifer suitability and opportunities, policy matters, operational issues, and some innovations in MAR methods and monitoring. This collection exemplifies the state of progress in the science and practice of MAR and is intended to be useful, at least to water managers, water utilities, agricultural water users and urban planners, to facilitate water resilience through new MAR projects.
Author : Segun Adelana
Publisher : CRC Press
ISBN 13 : 0203889495
Total Pages : 518 pages
Book Rating : 4.2/5 (38 download)
Download or read book Applied Groundwater Studies in Africa written by Segun Adelana and published by CRC Press. This book was released on 2008-09-23 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater is Africa‘s most precious natural resource, providing reliable water supplies for many people. Further development of groundwater resources is fundamental to increasing access to safe water across the continent to meet coverage targets and reduce poverty. There is also an increasing interest in the use of groundwater for irrigated
