Download or read book Application of the Water Evaluation and Planning WEAP Model to Assess Future Water Demands and Resources in the Olifants Catchment South Africa written by Roberto Arranz and published by IWMI. This book was released on 2007 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Olifants catchment is one of 19 Catchment Management Areas in South Africa. Different water users (i.e., rural, urban, mining, subsistence and commercial irrigated agriculture, commercial forestry, industry and power generation) are present in the catchment. Rising population andincreasing water provision in rural areas, in conjunction with the development of the mining industry, the construction of new power generation plants, the implementation of environmental flows andthe need to meet international flow requirements are going to greatly exacerbate the complexity of future water resources management in what is already a water-stressed catchment. Being able to assess the ability of the catchment to satisfy potential water demands is crucial in order to plan for the future and make wise decisions. In this study, a scenario analysis approach was used in conjunction with the Water Evaluation And Planning model, in order to assess the impacts of possible water demands on the water resources of the Olifants catchment in 2025. Foreach scenario, the water resource implications were compared to a 1995 “baseline.” The model enabled analyses of unmet water demands, streamflows and water storage for each scenario. The model results show that for the different scenarios considered in this study the implementation of the Environmental Reserve (an instream requirement to guarantee the health of the riverine ecosystems) will increase the shortages for other sectors. The construction of the main water storage infrastructure proposed by the Department of Water Affairs and Forestry, in conjunction with the application of Water Conservation and Demand Management practices, can reduce the unmet demands and shortfalls to levels lower than, or similar to, those experienced in the 1995 baseline. However, in all cases these interventions will be insufficient to completely meet the demands of all the sectors. A tight control of the growth in future demands is essential, although this may be difficult in a rapidly developing country like South Africa.
Download or read book Application of Water Evaluation and Allocation Planning WEAP Model to Assess Future Water Demands and Water Balance of the Caledon River Basin written by Abebe Seyoum Ayele and published by . This book was released on 2016 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Caledon catchment is one of the 19 catchments in South Africa and three catchments in Lesotho. It covers part of the south eastern Free State in South Africa and northern part of Lesotho. It is important to evaluate the water resources of the catchment to satisfy the projected water demands and in order to plan for the future and make wise decisions. The objective of this study was to apply the Water Evaluation and Planning System version 21 (WEAP21) as a Decision Support System (DSS) tool for the allocation and development of water resources in the Caledon catchment. The model was structured according to three scenarios with a current account (2014) and reference period (2015-2050) to predict their possible impacts on the water balance and allocation of the region due to varied water demands. The scenarios are as follows: scenario 1: increase in population growth rates; scenario 2: irrigation activities in Lesotho; and scenario 3: implementation of environmental flow requirement (EFR) on Caledon River at a site referred to as C6. The first two scenarios are consumptive scenarios whereas the third is a non-consumptive scenario. Scenario analysis answers “what if” questions for the future. Population growth has contributed to water scarcity problem in many parts of the world. In this context, scenario 1 deals with the impact of an increase in population growth on the water balance after 2020 by analysing the unmet demands that will be incurred over the reference period. Scenario 2 also analyses the unmet demands if irrigation activities in Lesotho are increased after 2020. Scenario 3 evaluates the impact of the implementation of an EFR site at C6 – which is situated downstream of all demand sites of the catchment – on upstream demands. Projected water demands and unmet demands were evaluated for four water use sectors, namely, domestic, industry, irrigation and livestock. The catchment comprised of 46 demand sites which were categorised into four use sectors: 20 domestic demand sites, 11 irrigation sites, 10 livestock sites and five industrial sites in both rural and urban areas. The modelling results show that high population growth increases the water shortage to all water use sectors in the catchment. Under a high population growth scenario, the unmet demand occurred between May and October. However, under reference, EFR and irrigation scenarios, the unmet demand occurred only from June to September. The annual unmet demand will increase substantially after 2020 in a high population growth scenario and when the population growth rates are altered. The demand from the irrigation sector is covered or no unmet demands are registered in all years. This is because active irrigation activities happen from December to May when enough water is available from the rivers. The years 2025 and 2050 were chosen to evaluate the water balance situations in terms of supply and demand in the middle and at the end of the reference period under two water use scenarios (high population growth and irrigation added). The result shows that the river flows meet the projected demand in 2025. However, most rivers, including the main river (Caledon River), will not be able to meet the required demands in 2050.
Download or read book Evaluation of historic current and future water demand in the Olifants River Catchment South Africa written by McCartney, Matthew P., Arranz, Roberto and published by IWMI. This book was released on 2007 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water resource development has played a significant role in the expansion of agriculture and industry in the Olifants River Catchment. However, currently water deficit is one of the major constraints hampering development in the catchment; both the mining and agricultural sectors are producing below optimal levels because of their reliance on insufficient supplies. In this study, the Water Evaluation and Planning (WEAP) model was used to evaluate scenarios of historic, current and future water demand in the catchment. For each scenario, the WEAP model was used to simulate demand in five different sectors (rural, urban, mining, commercial forestry and irrigation) over a 70-year period of varying rainfall and hydrology. Levels of assured supply were estimated for each sector and the economic cost of failing to provide water was predicted. For the future scenarios, the impact of infrastructure development and water conservation measures were assessed. The study illustrates how a relatively simple model can provide useful insight for resource planning and management.
Download or read book Future Water Demands and Resources in the Olifants Catchment South Africa written by Roberto Arranz and published by . This book was released on 2006 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Decision Support Systems for Large Dam Planning and Operation in Africa written by Matthew P. McCartney and published by IWMI. This book was released on 2007-01-01 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supported by many International agencies.
Download or read book Hydrometeorology written by Kevin Sene and published by Springer Science & Business Media. This book was released on 2009-12-12 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes recent developments in hydrometeorological forecasting techniques for a range of timescales, from short term to seasonal and longer terms. It conveniently brings together both meteorological and hydrological aspects in a single volume.
Download or read book Hydrology and water resources development in the Olifants River Catchment written by M.P. McCartney and published by IWMI. This book was released on 2004 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Olifants River is one of the major tributaries of the Limpopo River. Approximately 3,400,000 people live in its catchment and a considerable proportion of South Africa’s mining, power production and agricultural activities are concentrated there. The catchment also encompasses important tourist destinations (e.g., the Kruger National Park). Consequently, in terms of the national economy it is one of the country’s most significant waterways. The catchment is one of the first in South Africa for which a Catchment Mangement Agency (CMA) is planned.
Download or read book Water Resources Planning of the Olifants River Basin written by South Africa. Olifants River Basin Steering Committee and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development Trajectories of River Basins written by François Molle and published by IWMI. This book was released on 2003 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of societies is shaped to a large extent by their resources base, notably water resources. Access to and control of water depend primarily on the available technology and engineering feats, such as river-diversion structures, canals, dams and dikes. As growing human pressure on water resources brings actual water use closer to potential ceilings, supply-augmentation options get scarcer, and societies, therefore, usually respond by adopting conservation measures and by reallocating water towards more beneficial uses.
Download or read book From Integrated to Expedient written by Lankford, B. A and published by IWMI. This book was released on 2007 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Study draws on experiences in the catchment of the Great Ruaha River in Tanzania.
Download or read book Analysis of Sectoral Water Demands and Optimal Water Allocation in the Middle Olifants Sub Basin of South Africa The Case of Mining and Irrigation written by Teresa Walter and published by Cuvillier Verlag. This book was released on 2010-12-07 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An evaluation of proposed World Water Programme indicators for use in South Africa written by Danny Walmsley and published by IWMI. This book was released on 2004 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: This present study forms part of this evaluation phase and makes use of South Africa as an African Continent case study to assess and provide feedback on the proposed WWAP indicators. The main objective of the study has been to evaluate the proposed WWAP indicators in terms of their relevance and practicality to South Africa. Carried out in collaboration with the South African Department of Water Affairs and Forestry, this has also provided an opportunity to assess the status of current indicators and reporting initiatives in South Africa, as well as to comment on the process by which indicators might be further developed and used.
Download or read book Olifants written by South Africa. Department of Water Affairs and Forestry. Directorate of Project Planning and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Olifants written by South Africa. Department of Water Affairs and Forestry and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of current and future water resources development in the Lake Tana Basin Ethiopia written by McCartney M. , Alemayehu T. , Shiferaw A. , Awulachew S. and published by IWMI. This book was released on 2010 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake Tana, located in the headwaters of the Blue Nile, is valuable for many people including the communities who live around the lakeshore and those who live immediately downstream. The area has been identified as a region for hydropower and irrigation development, vital for economic growth in Ethiopia. A multidisciplinary study was conducted to assess the possible impacts of this development. This study found that current development has benefited some local people but adversely affected others. Future development will exacerbate pressure on the lake. Hard choices must be made about how the water is best utilized. It is important that all stakeholders, including local people, are involved in the decision-making process.
Download or read book More Crop Per Drop written by Meredith Giordano and published by IWA Publishing. This book was released on 2007-01-01 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is an analytical summary and a critical synthesis of research at the International Water Management Institute over the past decade under its evolving research paradigm known popularly as 'more crop per drop'. The research synthesized here covers the full range of issues falling in the larger canvas of water-food-health-environment interface. Besides its immediate role in sharing knowledge with the research, donor, and policy communities, this volume also has a larger purpose of promoting a new way of looking at the water issues within the broader development context of food, livelihood, health and environmental challenges. More crop per drop: Revisiting a research paradigm contrasts the acquired wisdom and fresh thinking on some of the most challenging water issues of our times. It describes new tools, approaches, and methodologies and also illustrates them with practical application both from a global perspective and within the local and regional contexts of Asia and Africa. Since this volume brings together all major research works of IWMI, including an almost exhaustive list of citations, in one single set of pages, it is very valuable not only as a reference material for researchers and students but also as a policy tool for decision-makers and development agencies.
Download or read book Olifants written by South Africa. Department of Water Affairs and Forestry. Directorate of Project Planning and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
