Download or read book Improved Hydrological Understanding of a Semi Arid Subtropical Transboundary Basin Using Multiple Techniques The Incomati River Basin written by Saraiva Okello and published by CRC Press. This book was released on 2019-05-13 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study aims at improving the hydrological process understanding of the semi-arid and transboundary Incomati river basin to enable better water management. Comprehensive statistical and trend analysis of rainfall and streamflow were conducted, and the Indicators of Hydrological Alteration tool was deployed to describe the streamflow regime and trends over time. Land use and land cover change, particularly the conversion of natural vegetation into forest plantation, the expansion of irrigated agriculture and the flow regulation due to dam operation were identified as critical drivers of flow regime alteration. Hydrograph separation using long-term hydrochemical data at seasonal scale, and hydrochemical and isotope data at event scale were performed to quantify runoff components. A novel methodology to calibrate recursive digital filters using routinely collected water quality data was developed and tested in the catchment. This method allows for estimation of daily baseflow from readily available daily streamflow data. Dominant runoff generation zones were mapped using the Height Above Nearest Drainage approach. The hydrological model STREAM was then employed, informed by the runoff generation zones mapping and the process understanding gained in the catchment, as well as remote sensing data. The study provides the basis for better operational water management in the catchment.
Download or read book Improved Hydrological Understanding of a Semi Arid Subtropical Transboundary Basin Using Multiple Techniques The Incomati River Basin written by Saraiva Okello and published by CRC Press. This book was released on 2019-05-13 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study aims at improving the hydrological process understanding of the semi-arid and transboundary Incomati river basin to enable better water management. Comprehensive statistical and trend analysis of rainfall and streamflow were conducted, and the Indicators of Hydrological Alteration tool was deployed to describe the streamflow regime and trends over time. Land use and land cover change, particularly the conversion of natural vegetation into forest plantation, the expansion of irrigated agriculture and the flow regulation due to dam operation were identified as critical drivers of flow regime alteration. Hydrograph separation using long-term hydrochemical data at seasonal scale, and hydrochemical and isotope data at event scale were performed to quantify runoff components. A novel methodology to calibrate recursive digital filters using routinely collected water quality data was developed and tested in the catchment. This method allows for estimation of daily baseflow from readily available daily streamflow data. Dominant runoff generation zones were mapped using the Height Above Nearest Drainage approach. The hydrological model STREAM was then employed, informed by the runoff generation zones mapping and the process understanding gained in the catchment, as well as remote sensing data. The study provides the basis for better operational water management in the catchment.
Download or read book Operationalising hybrid water law for historical justice written by Mukuyu, Patience and published by IWMI. This book was released on 2022-11-01 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: Final project report submitted to the Water Research Commission (WRC). Pretoria, South Africa: Water Research Commission (WRC).
Download or read book Drought in Arid and Semi Arid Regions written by Kurt Schwabe and published by Springer Science & Business Media. This book was released on 2013-07-08 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering a cross-country examination and comparison of drought awareness and experience, this book shows how scientists, water managers, and policy makers approach drought and water scarcity in arid and semi-arid regions of Spain, Mexico, Australia, South Africa and the United States.
Download or read book Management Of Transboundary Water Resources Under Scarcity A Multidisciplinary Approach written by Dinar Ariel and published by World Scientific. This book was released on 2017-03-17 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water scarcity due to climate change, population growth, and economic development is a critical issue in many semi-arid and arid regions around the world. Water scarcity is especially critical in regions where water is shared by several riparian states and used for competing purposes (irrigation, domestic, industry, environment, and hydropower). There is evidence that water scarcity may give rise to conflicts among the riparian states that share water basins. At the same time, there is evidence that proper arrangements among riparian states create a basis for cooperation, which is a necessary condition for economic development, food production, environmental sustainability, and poverty reduction. This book presents a collection of work presented by a group of academics and policy experts dealing with the impact of water scarcity and variability on the ability to jointly manage shared water and the derived welfare of international states and nations sharing international river basins, consisting of economics, technology, law and institutions, geography, and international relations. The book covers theoretical aspects of management of transboundary water as well as case studies from hotspots around the world. The unique aspect of this book is the multidisciplinary nature of the chapters, reflecting a new field of research that will gain popularity as water scarcity will increase over time and across regions. The chapters from the book were presented at the "Management of Transboundary Water Resources under Scarcity: Perspectives on Agriculture and Food Security" workshop held at The Hebrew University of Jerusalem, Israel, from June 22 to 23, 2015.
Download or read book Hydrology and Water Resources Management in Arid Semi arid and Tropical Regions written by Christopher Misati Ondieki and published by Engineering Science Reference. This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrology is a key influence on water security, environmental sustainability, agricultural production, energy, and transport, especially in unique environments such as arid regions and the tropics, where degradation issues on water and land can threaten the livelihoods of poor communities. With implications in urbanization, landscape architecture, and sanitation, enhancing the practice of water use, management, and planning is imperative for the sustainable development of these regions. Hydrology and Water Resources Management in Arid, Semi-Arid, and Tropical Region is an essential research publication that seeks to improve scientific understanding and sharing of data in hydrology and integrated water resources management of arid, semi-arid, and tropical regions in order to enhance water governance and alleviate reduction in the vulnerability of water resources systems to global changes. Featuring a wide range of topics such as hydrometeorology, sustainable development, and climate change, this book is ideal for researchers, technology developers, academicians, policymakers, government officials, and students.
Download or read book Dryland Rivers written by L. J. Bull and published by John Wiley & Sons. This book was released on 2002-03-22 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the processes operating in the headwaters and main channels of ephemeral rivers in semi-arid environments and includes coverage of current fieldwork investigations, modeling approaches, and management issues. focuses on dryland channel networks and processes presents a historical framework for research discusses examples of current studies and evaluates contemporary modelling approaches Emphasis is on the Mediterranean region, with comparisons to other dryland regimes eg California, Australia, Chile.
Download or read book Transboundary Rivers Sovereignty and Development written by and published by . This book was released on 2003 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a water balance for the Atankwidi catchment West Africa A case study of groundwater recharge in a semi arid climate written by and published by Cuvillier Verlag. This book was released on 2006-05-31 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regolith aquifers in the weathered zone overlying Precambrian basement rocks serve as the main source of groundwater in a large part of the Volta River basin in West Africa. A prerequisite for sustainable groundwater resources management is the knowledge of recharge processes and the annual recharge rate. This research assesses the water balance, and in particular the groundwater recharge rate, for the Atankwidi catchment, a 275 km² sub-catchment of the White Volta in northern Ghana. Large uncertainties are typically inherent in any singular method to determine groundwater recharge. For this reason, an integrated approach is developed in this work which makes use of several field methods and combines results from these methods with water budget modeling. Field methods included in this approach are groundwater level observations, isotope analyses and a Chloride mass balance. The Atankwidi catchment falls within the semi-arid Sudan-Savanna climate zone. The climate is characterized by high temperatures and a single rainy season from May to October with an average annual rainfall of 990 mm. The hydrogeological system consists of three aquifers: The discontinuous, shallow aquifer, the regolith aquifer and the fracture aquifer. The principal aquifer is the regolith aquifer in the weathered mantle, which is usually targeted for drinking water supply. It forms a continuous aquifer with an average saturated thickness of 25 m and a hydraulic conductivity of 2.5E-6 to 2.5E-5 m/s. Recharge rates vary considerably between wet and dry years and between locations, with a range of 2 % to 13 % of annual rainfall. The long term recharge rate is determined by the Chloride mass balance to be approximately 6 % of average annual rainfall. The research emphasizes the importance of high rainfall intensities in creating groundwater recharge. Interannual comparison of water level fluctuations shows that a decrease in annual rainfall of 20 % causes a reduction of groundwater recharge of 30 % to 60 %. The impact of changing quantities of annual rainfall on groundwater recharge is overestimated by methods that do not account for infiltration by preferential flow. A long term average groundwater recharge of 60 mm/y compares to a total current groundwater abstraction of 4 mm/y in the study area, which is one of the areas with the highest groundwater use per km² in the Volta River basin. Recharge is therefore currently not a limiting factor for groundwater resources development. Water budget modeling using WaSIM-ETH calculates that 63 % of annual rainfall is lost to evapotranspiration in a wet year (2003), and 82 % in a dry year (2004). In the investigated mesoscale catchment 23 % and 11 % of annual rainfall end up as surface run-off in a wet year and a dry year, respectively. Approximately 40 % of surface run-off consists of interflow, while the main fraction is direct run-off. Base flow from groundwater is negligible. Groundwater flow in the regolith aquifer is modeled with Visual Modflow, assuming average hydraulic conductivities as determined by pumping test evaluation. The model calculatesthat only about 5 % of groundwater recharge leaves the basin as groundwater flow. This is evidence that the regolith aquifer does not contribute to a large extent to regional groundwater flow. Leakage to localized zones of high hydraulic conductivity of the fracture aquifer, which underlies the regolith aquifer, could act as a main sink of groundwater recharge. However, the exact location and hydraulic properties of fracture zones are largely unknown, so that the flux from the regolith aquifer to these fractures as well as the amount of flow through fractures is impossible to estimate at present. Pumping tests with observation wells to assess the specific yield, long-term pumping test at the basin outlet and a continuation of groundwater hydrograph recording at high temporal resolution could largely enhance the knowledge of hydraulic properties in the future. The groundwater model could then be improved and extended to gain certainty on the characteristics of groundwater flow.
Download or read book Integrated Pollution Prevention and Control for the Municipal Water Cycle in a River Basin Context written by Alberto Galvis-Castaño and published by CRC Press. This book was released on 2019-08-14 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: The protection of water resources from deterioration in quality by pollution discharges is probably the biggest challenge in sustainable water resources management in the recent decades. In practice, most countries have adopted pollution control strategies and measures which are based on ‘end-of-pipe’ solutions: wastewater treatment plants and adjustments to the regulations, including taxes for wastewater discharges (Conventional Strategy). Although this approach involves very high costs, on many occasions, this strategy has been a complete failure. The research described in this book contribute to the development of sustainable solutions for the previously outlined problem. It was based on the validation of the Three-Step Strategic Approach concept (3-SSA), which includes: 1) prevention or minimisation of waste production; 2) treatment aimed at recovery and reuse of waste components, and 3) disposal of remaining waste with stimulation of natural self-purification of the receiving water body. The study showed overall positive effects of the 3-SSA, in comparison of Conventional Strategy, on wastewater management in the Upper Basin (389 km) of the Cauca river, the second most important river in Colombia. The Cost Benefit Analysis clearly favoured the 3-SSA, generating a major impact on the river water quality at lower cost compared to the Conventional Strategy.
Download or read book Comparison of Institutional Arrangements for River Basin Management in Eight Basins written by William Andrew Blomquist and published by World Bank Publications. This book was released on 2005 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study represents an effort toward understanding conditions that affect successful or unsuccessful efforts to devolve water resource management to the river basin level and secure active stakeholder involvement. A theoretical framework is used to identify potentially important variables related to the likelihood of success. Using a comparative case-study approach, the study examined river basins where organizations have been developed at the basin scale and where organizations perform management functions such as planning, allocation, and pricing of water supplies, flood prevention and response, and water quality monitoring and improvement. This paper compares the alternative approaches to basin governance and management adopted in the following river basins: the Alto-Tiete and Jaguaribe River Basins, Brazil; the Brantas River Basin, East Java, Indonesia; the Fraser River Basin, British Columbia, Canada; the Guadalquivir Basin, Spain; the Murray-Darling River Basin, Australia; the Tarcoles River Basin, Costa Rica; and the Warta River Basin, Poland. The analysis focuses on how management has been organized and pursued in each case in light of its specific geographical, historical, and organizational contexts and the evolution of institutional arrangements. The cases are also compared and assessed for their observed degrees of success in achieving improved stakeholder participation and integrated water resources management.
Download or read book Water Resources of Arid Areas written by D. Stephenson and published by Taylor & Francis. This book was released on 2004-08-15 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: With Africa's water resources constantly threatened by an increasing population and the resultant rise in water demand, together with the stresses of water use for various activities, desertification, climate change, and other interventions in the water cycle by man, it is vital that the water resources in arid and semi-arid regions are developed a
Download or read book Water and Climate Change Adaptation in Transboundary Basins written by United Nations Economic Commission for Europe and published by United Nations. This book was released on 2015-12-15 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: The publication intends to demonstrate and illustrate important steps and lessons learned to take into account when developing a climate change adaptation strategy for water management in the basin or transboundary context. It aims to compile, analyse, publish and disseminate lessons learned and good practices on water and adaptation to climate change in transboundary basins. It includes lessons learnt and good practices from the programme of pilot projects under the UNECE Convention on the Protection and Use of Tranbsboundary Watercourses and International Lakes implemented since 2010 in cooperation with partner organizations such as OSCE and UNDP in the framework of the Environment and Security Initiative. It also includes lessons and examples from numerous other organizations working on water and climate change in transboundary basins, such as the International Union for Conservation of Nature (IUCN), the Global Water Partnership and many others.
Download or read book Arid Lands Water Evaluation and Management written by Robert Maliva and published by Springer Science & Business Media. This book was released on 2012-06-09 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt: A large part of the global population lives in arid lands which have low rainfall and often lack the water required for sustainable population and economic growth. This book presents a comprehensive description of the hydrogeology and hydrologic processes at work in arid lands. It describes the techniques that can be used to assess and manage the water resources of these areas with an emphasis on groundwater resources, including recent advances in hydrologic evaluation and the differences between how aquifer systems behave in arid lands versus more humid areas. Water management techniques are described and summarized to show how a more comprehensive approach to water management is required in these areas, including the need to be aware of cultural sensitivities and conditions unique to many arid regions. The integration of existing resources with the addition of new water sources, such as desalination of brackish water and seawater, along with reusing treated wastewater, will be required to meet future water supply needs. Also, changing climatic conditions will force water management systems to be more robust so that future water supply demands can be met as droughts become more intense and rainfall events become more intense. A range of water management techniques are described and discussed in order to illustrate the methods for integrating these measures within the context of arid lands conditions.
Download or read book The Nile Basin water resources overview of key research questions pertinent to the Nile Basin initiative written by Yasir Mohamed and published by IWMI. This book was released on 2008-06-24 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Nile Basin Initiative (NBI) is a remarkable achievement towards the cooperative management of the common Nile water resources. Based on a Shared Vision Program and a Subsidiary Action Program, the NBI has numerous ongoing projects on the ground. Research on the Nile water resources has been recognized to be crucial for successful implementation of the NBI projects. Therefore, IWMI and other research centers have worked together with the NBI to identify knowledge gaps pertinent to the Nile water resources. This report presents prioritized research questions, pertinent ongoing research projects and the implementing institutions; and available databases on the Nile.
Download or read book Modeling Water Resources Management at the Basin Level written by Ximing Cai and published by Intl Food Policy Res Inst. This book was released on 2006-01-01 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report develops an integrated economic-hydrologic river basin model and applies it to the Maipo River Basin in central Chile. Policy simulations based on the modeling framework can serve as a guide for water resource managers and policymakers in designing appropriate water policies and establishing reform priorities for water resource allocation. Alternative analyses undertaken for the Maipo basin-a mature water economy with limited resources and competition for water across all water-using sectors-offer new insights into the changing relationships between irrigation system and basin-level water use efficiencies. They also show how these changing relationships affect farm incomes and environmental impacts. Simulations also provide new results on the role that the trading of water use rights can play in maintaining farm production levels, enhancing farmer incomes, and increasing water use efficiencies.
Download or read book Hydronomic Zones for Developing Basin Water Conservation Strategies written by D. J. Molden and published by IWMI. This book was released on 2001 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report, the concept and procedures of hydronomic (hydro water + nomus management) zones are introduced. A set of six hydronomic zones are developed and defined based on key differences between reaches or areas of river basins. These are the: Water Source Zone, Natural Recapture Zone, Regulated Recapture Zone, Stagnation Zone, Final Use Zone, and Environmentally Sensitive Zone. The zones are defined based on similar hydrological, geological and topographical conditions and the fate of water outflow from the zone. In addition, two conditions are defined which influence how water is managed: whether or not there is appreciable salinity or pollution loading; and whether or not groundwater that can be used for utilization or storage is present. Generic strategies for irrigation for four water management areas, the Natural Recapture, Regulated Recapture, Final Use, and Stagnation Zones, are presented. The Water Source Zone and Environmentally Sensitive Zone are discussed in terms of their overall significance in basin water use and management.
