Download or read book Hydrological Impacts of Land Use Changes on Water Resources Management and Socio Economic Development Ofthe Upper Ewaso Ng iro River Basin in Kenya written by Stephen Njuguna Ngigi and published by CRC Press. This book was released on 2017-11-06 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the apparently desperate situation of sub-Saharan Africa, rainwater harvesting and management is a viable intervention for upgrading rain-fed agriculture, improving water supply and sustainable livelihoods in water-scarce river basins. If strategies are developed to ensure equity allocation of basin water, a win-win situation for diverse water users can be achieved. This thesis assesses the hydrological impacts of land use changes on water resources management and socio-economic development of the upper Ewaso Ng�iro river basin in Kenya. It considers the impact of irrigation on dry season river flows and highlights the challenge of flood storage strategies. While flood storage can reduce dry season irrigation water abstractions by more than a half, without affecting hydro-ecological functions downstream, unplanned flood harvesting may impact negatively on flood flow, being detrimental to natural ecosystems and groundwater downstream.
Download or read book Hydrological Impacts of Land Use Changes on Water Resources Management and Socio Economic Development of the Upper Ewaso Ng iro River Basin in Kenya written by Stephen Njuguna Ngigi and published by CRC Press. This book was released on 2006-11-02 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offering an assessment of the hydrological impacts of land use changes on water resources management and socio-economic development of the upper Ewaso Ng'iro river basin in Kenya, this book explores the impact of irrigation on dry season river flows and highlights the challenge of flood storage strategies. While flood storage can reduce dry season irrigation water abstractions by more than a half, without affecting hydro-ecological functions downstream, unplanned flood harvesting may impact negatively on flood flow, being detrimental to natural ecosystems and groundwater downstream. The book discusses strategies to ensure equity allocation of basin water, creating a win-win situation for the water users affected.
Download or read book Rainwater Smart Agriculture in Arid and Semi Arid Areas written by Walter Leal Filho and published by Springer. This book was released on 2017-12-28 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces state-of-the-art approaches, methods and research, focusing on smart management of rainwater. In addition, it provides an overview of projects from across the world, illustrating how rainwater-smart management has been implemented in drylands. Focusing on the scientific perspective it demonstrates how rural dryland agriculture can be improved. It also documents the wealth of rainwater-smart know-how available today, and replicates and transfers results to other countries and regions, to encourage cross-sector interactions among various stakeholders, such as practitioners from governmental and public organisations, policy- and decision-makers, and teaching staff from academic scientific institutions. The contributors showcase vital lessons learned from research, field projects and best-practice examples. They address the integrated use of rainwater harvesting management with landscape restoration practices and water-, and climate-smart agriculture for food security and poverty alleviation in arid and semi-arid areas. Original research, combined with the contributors’ synthetic approach, lays a foundation for new concepts and ideas. Through case studies and research reports, the book discusses all the relevant issues necessary for the comprehensive analysis and successful implementation of the technologies in rainwater management. Highlighting the working principles and technical recommendations with regard to cost-efficient rainwater-smart solutions, it is of interest to practitioners. It is also a valuable resource for academic specialists, professionals and students, since many development agencies are funding rainwater harvesting for irrigation purposes.
Download or read book Handbook of Water Harvesting and Conservation written by Saeid Eslamian and published by John Wiley & Sons. This book was released on 2021-03-01 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water harvesting is gaining more and more recognition as a sustainable and resilient water supply options. It is economically viable, socially compatible and environmentally friendly. Water harvesting has proven to be a robust solution to overcome or reduce water shortages all over the world. It is important to understand how to apply this practice in a sustainable and effective way to make full use of its potential in a world increasingly threatened by water scarcity. The Handbook of Water Harvesting and Conservation: Basic Concepts and Fundamentals is the most comprehensive, up-to-date and applied handbook on water harvesting and conservation yet published. The book’s 30 chapters -- written by 84 outstanding international experts from approximately 20 selected countries faced by drought -- explore, critique and develop concepts and systems for water harvesting. The editors bring together many perspectives into a synthesis that is both academically based and practical in its potential applications. The Handbook of Water Harvesting and Conservation: Basic Concepts and Fundamentals is an important tool for education, research and technical works in the areas of soil, water and watershed management and is highly useful for drought strategy planning, flood management and developing techniques to adapt to climate change in urban, agricultural, forest and rangeland areas.
Download or read book Rural Development Abstracts written by and published by . This book was released on 2007 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impacts of Landscape Change on Water Resources written by Manoj K. Jha and published by MDPI. This book was released on 2020-11-13 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Changes in land use and land cover can have many drivers, including population growth, urbanization, agriculture, demand for food, evolution of socio-economic structure, policy regulations, and climate variability. The impacts of these changes on water resources range from changes in water availability (due to changes in losses of water to evapotranspiration and recharge) to degradation of water quality (increased erosion, salinity, chemical loadings, and pathogens). The impacts are manifested through complex hydro-bio-geo-climate characteristics, which underscore the need for integrated scientific approaches to understand the impacts of landscape change on water resources. Several techniques, such as field studies, long-term monitoring, remote sensing technologies, and advanced modeling studies, have contributed to better understanding the modes and mechanisms by which landscape changes impact water resources. Such research studies can help unlock the complex interconnected influences of landscape on water resources in terms of quantity and quality at multiple spatial and temporal scales. In this Special Issue, we published a set of eight peer-reviewed articles elaborating on some of the specific topics of landscape changes and associated impacts on water resources.
Download or read book Handbook of Transdisciplinary Research written by Gertrude Hirsch Hadorn and published by Springer Science & Business Media. This book was released on 2007-12-15 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transdisciplinary Research (TR) is an emerging field in the knowledge society for relating science and policy in addressing issues such as new technologies, migration, and public health. This handbook provides a structured overview of the manifold experiences gained in these fields. In the first part, 21 projects from all over the world present their research approaches. In the second part, cross-cutting challenges of TR are discussed in reference to the same projects.
Download or read book Integrated Water Resources Management in Water scarce Regions written by Stefan Liehr and published by IWA Publishing. This book was released on 2018-03-15 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research project CuveWaters developed and implemented adapted technologies and accompanying measures to support the national process towards an Integrated Water Resources Management (IWRM). The aim is to give people in the Cuvelai-Etosha Basin reliable access to clean water over the long term, thus enhancing their livelihood and health, and to create job opportunities. IWRM relies on solutions that use various sources, types and qualities of water for different purposes. CuveWaters implemented pilot plants for rain- and floodwater harvesting, groundwater desalination, as well as facilities for sanitation and water reuse. Technical components of the project were framed by societal and scientific components. Integrated Water Resources Management in Water-scarce Regions provides a comprehensive view on the complexity and interconnectedness of findings and conclusions regarding the principle strategic approach within the CuveWaters project’s concept. The book aims to present the work of technical, social and natural scientists but also of media professionals: It gives thematically focussed details on the three technology-based solutions which go beyond mere technical considerations and embed this into the overarching process towards IWRM in Namibia. Finally, it critically addresses lessons learnt and limits of projects in the context of research for implementation. This book is of great value to experts, professionals and also students and academics in the areas of water management, technology development and implementation and transdisciplinary science.
Download or read book Modelling the Effects of Land Use Change and Climate Variability on the Hydrology of the Upper Nile written by Max Kigobe and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The River Nile is the second longest river in the world and its basin covers ten African countries including Uganda. In the light of growing human and industrial demand on its ecosystem, especially water resources, the need to support sustainable basin-wide resource management has risen over the recent past. Most economies in the Nile basin are dependent on rain-fed agriculture, which is strongly affected by climate. Therefore, the basin is vulnerable to a number of issues including land use change, climate change and climate variability. Other stress factors include rapid population growth, land degradation and the prevalence of human disease. These factors are likely to adversely impact on the basin ecosystem and agricultural productivity, which in turn affect the economic development in terms of food security, hydropower generation and provision of ecosystem services. It is imperative to conduct detailed hydrological assessment of the likely impact of land-use changes and climate variability on the hydrology of the Nile basin. This thesis therefore investigates the hydrological response to plausible climate and land use scenarios. This is carried out by testing climate and hydrological modelling tools for the Kyoga basin, within the Upper Nile. Climate modelling involved multi-site spatial and temporal modelling of rainfall in the Kyoga basin using stochastic tools under the Generalised Linear Modelling (GLM) framework. Climate modelling results showed that the structure of the GLM could not represent adequately the variability of rainfall over Kyoga, however, it could represent the variability within designated climatic zones. Assuming independence of the stochastic variability between zones in the Kyoga basin, GLM models for the Kyoga basin were then applied as statistical downs ea ling tools to generate future precipitation sequences conditioned on the results from six general circulation model (GCM) outputs for future climate (2020s, 2050s, 2080s) using results from the Special Report on Emissions Scenarios (SRES) prepared by the Intergovernmental Panel on Climate Change (IPCC) for the Fourth Assessment Report (SRES-AR4). With regard to climate change, warming of the basin resulted in a general increase in precipitation patterns and the results from the use of GLMs suggest that it is likely to have a relatively wetter December - February (DJF), March - May (MAM), September - November (SON) seasons and a much dryer June - August (JJA) season. Hydrological modelling involved the development of a semi-distributed rainfall-runoff model using the Soil Water and Assessment Tool (SWAT), applied on a daily time-scale to investigate the uncertainty associated with precipitation and model parameter identification. The SWAT model was also used to assess the sensitivity of several water resources components to alternative/plausible climate and land use patterns in the Kyoga basin. Hypotheticalland use change scenarios showed that the water resource estimates in the Kyoga basin are sensitive to intensification of agriculture and less sensitive to increase in spatial coverage of grasslands and shrublands. A warmer climate is also associated with increase in potential evapotranspiration, soil water and internal renewable water resources in the Kyoga basin and stream flows at several locations in the basin. The results from this PhD work contribute towards the development of climate and hydrological modelling tools applicable to equatorial climates.
Download or read book Impacts of Landscape Change on Water Resources written by Manoj K. Jha and published by . This book was released on 2020 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Changes in land use and land cover can have many drivers, including population growth, urbanization, agriculture, demand for food, evolution of socio-economic structure, policy regulations, and climate variability. The impacts of these changes on water resources range from changes in water availability (due to changes in losses of water to evapotranspiration and recharge) to degradation of water quality (increased erosion, salinity, chemical loadings, and pathogens). The impacts are manifested through complex hydro-bio-geo-climate characteristics, which underscore the need for integrated scientific approaches to understand the impacts of landscape change on water resources. Several techniques, such as field studies, long-term monitoring, remote sensing technologies, and advanced modeling studies, have contributed to better understanding the modes and mechanisms by which landscape changes impact water resources. Such research studies can help unlock the complex interconnected influences of landscape on water resources in terms of quantity and quality at multiple spatial and temporal scales. In this Special Issue, we published a set of eight peer-reviewed articles elaborating on some of the specific topics of landscape changes and associated impacts on water resources.
Download or read book The British National Bibliography written by Arthur James Wells and published by . This book was released on 2009 with total page 2744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Facing the Facts written by Hans E. Beekman and published by UNEP/Earthprint. This book was released on 2006-07-07 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Africa's high dependence upon natural resources makes the continent particularly vulnerable to changes in the availability of water as a result of climate changes. In this study, the vulnerability of water resources to environmental change is assessed on a river/lake/groundwater basin scale for the Southern, Eastern, Western and Northern African regions.
Download or read book Integrated Modeling of Land and Water Resources in Two African Catchments written by Seleshi Getahun Yalew and published by CRC Press. This book was released on 2018-03-14 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand for land and water for agriculture, urbanization, irrigation, hydropower, and industrialization is increasing to meet the demands of growing populations and of growing economies. However, changes in land and water resources are often studied separately. A better representation of the interaction between land-use change and its drivers on the one hand and water resources on the other is imperative for sustainable environmental management. This research investigates and develops spatial analysis methods and tools for the quantification of dynamic feedbacks between land-use change and water resources, by focusing on case study catchments in Ethiopia and South Africa. Furthermore, the research investigates methods for analysing land-use suitability and modelling land-use change. Results show that major changes in land-use have been observed in the past two to three decades in the study catchments. Model representation of the interaction between land-use change and water resources shows that changes in land-use influence hydrologic responses. These influences are especially pronounced during high- and low-flow seasons. Likewise, hydrologic processes and water resources availability influence land-use suitability and hence land-use change responses. Accounting for the dynamic feedback between land-use and hydrology thus produces improved knowledge that can better inform integrated natural resources management.
Download or read book Baseline review and ecosystem services assessment of the Tana River Basin Kenya written by Baker, Tracy and published by International Water Management Institute (IWMI). This book was released on 2015-06-01 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ‘WISE-UP to climate’ project aims to demonstrate the value of natural infrastructure as a ‘nature-based solution’ for climate change adaptation and sustainable development. Within the Tana River Basin, both natural and built infrastructure provide livelihood benefits for people. Understanding the interrelationships between the two types of infrastructure is a prerequisite for sustainable water resources development and management. This is particularly true as pressures on water resources intensify and the impacts of climate change increase. This report provides an overview of the biophysical characteristics, ecosystem services and links to livelihoods within the basin.
Download or read book The Water Resource Implications of Changing Climate in the Volta River Basin written by Matthew McCartney and published by IWMI. This book was released on 2012 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Volta River is one of the major rivers in Africa. In this study, a dynamic regional climate model (CCLM), a hydrological model (SWAT) and a water resource model (WEAP) were used to provide an assessment of one downscaled ‘middle impact’ climate change scenario on the performance of existing and planned irrigation and hydropower schemes. The results indicate that, by the middle of the twenty-first century, altered climate is likely to undermine the technical performance of existing and planned reservoirs, which will, in turn, affect development outcomes. Future water resources development in the basin requires interventions that bolster resilience and water security. Much more systematic planning of water storage, greater cooperation between the riparian states and consideration of innovative approaches to water storage are needed.
Download or read book Combined Effects of Land Use Change and Climate Change on Soil Loss and Water Bablance Variables written by Yashar Makhtoumi and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Changes in water balance variables such as runoff and evapotranspiration (ET) are essential in planning and management of land and water resources. Two major factors affecting these variables are climate and land use change. There is a need to investigate the combined effects of land use and climate change at local scales. Towards that end, the hydrological processes were modeled using the Soil and Water Assessment Tool (SWAT) to investigate the impacts of climate and land use change in Southeast US (Makhtoumi, Li, Ibeanusi, and Chen, 2020). We integrated land use based on the Shared Socioeconomic Pathways (SSPs) with future climate data (CMIP5) to study the combined effects on hydrological response of Upper Choctawhatchee Watershed (UCW.) Future rainfall and air temperature, for two time periods (2040-2069 and 2070-2099), were obtained using Global Climate Models to provide SWAT with the climatic forcing in order to project water balance variables. The simulation was carried out under two radiative forcing pathways of Representative Concentration Pathways (RCP4.5 and RCP6.0.) Our results indicate that increased imperviousness resulted from urbanization has more impact on runoff than that of projected changes in climate. Impacts on water balance variables (runoff, ET, discharge) differed seasonally. Results showed peak surface runoff experienced changes under both emission scenarios in June up to five times increase. Among the water balance variables, ET as the least dominant pathways for water loss, showed the modest changes with the largest decrease during fall and summer. Projections indicated more frequent extreme behavior regarding precipitation, peak surface runoff, water yield (WY) and ET, during midcentury. Discharge was estimated to increase through the year and the highest changes were expected during summer and fall with 186.3% increase in November under RCP6.0. Relying on rainfall for farming along with reduced agricultural land use (11.8%) and increased urban area (47%) and population growth, would likely make the water use efficiency critical. In our second study, we focused on the combined impact of land use and climate change on soil erosion at local scales. Topsoil loss is a widespread environmental concern causing adverse impacts on natural and human systems. Severe weather accompanied with human activities can exacerbate this issue degrading soil health and consequently accelerating global and regional food insecurity and injustice. Erosion impairs soil physical and chemical properties such as infiltration rate, water holding capacity, loss of nutrients including soil carbon and nitrogen. Although, temporal properties of a rainfall event have meaningful implications for soil erosion, spatial heterogeneity of a rainfall contributes substantially and cannot be overlooked. Therefore, in the third chapter we investigated soil loss using SWAT in Northern Mississippi. First, we built a hydrological model and calibrated it for both flow and sediment discharge. Then we developed land use and climate scenarios. The land use scenarios include farming (soybean and corn) and grazing practices. The climate scenarios comprise of four different precipitation time series, S0 which no concentration is forced, while S1, S2, and S3 have 3%, 6%, and 9% concentration in top four rainy days, respectively. We coupled the land use and climate scenarios and evaluated a small watershed (Hickahala Creek Watershed) in response. We classified the subbasins into different classes of soil loss severity and then determined the hotspots for soil loss at subbasin scale. Our result suggests that the resolution of rainfall data is crucial in studying the soil loss. We found that pasture management by itself can manifold soil loss, and if accompanied with extreme rainfalls, soil loss accelerates impacting different subbasins each time. We found that spatial heterogeneity of extreme rainfalls (ERs) can be more substantial than land use in individual extreme rainfalls; however, over a year, soil moisture and type of the management practices (grazing and farming) could contribute more to soil loss. Soil loss can go as high as 350 (ton/ha/yr) under the ERs. Adding only the management practices can increase erosion 3600%. Under S1 parts of watershed yield more than 150 ton/ha/yr (extremely severe). Under S2 and S3 more soil loss hotspots emerge yielding approximately 200 ton/ha/yr. We found that in the hotspots, up to 10% increase in CI can increase annual soil loss up to 75%. Single ER can generate up to 35% of annual soil loss. Under one ER event hotspot subbasins can lose up to 160 ton/ha/day (subbasin 15). The results reveal that adding grazing and farming (S0) under one ER event can increase soil loss by 95%. 32% and 80% increase in rainfall amount in one ER event can increase soil loss by 94% and 285% respectively. Our results suggested the importance of site-specific managements to mitigate soil loss and all the consequences. It is essential to consider the varying sensitivity of subbasins for the sustainability of agricultural landscapes.
Download or read book Water Resources Management written by J. Ngana and published by . This book was released on 2002 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: land uses of the Pangani river basin, e.g. farming and non-farming activities; socio-economic aspects of water resources management; rural population mobility; institutional arrangements in river basins, legislation and policies; poverty and the impact of climate change; the environmental economics of water resource management - e.g. diminishing water resources and increasing water demands; population growth and migration trends; land degradation, hydrologic modelling and irrigation management; the impact of irrigation and the spread of disease; vegetation and its relation with hydrology; and conservation strategies in the Kilimanjaro mountains.
