Your search found 5 records
1 Tare, V.; Gurjar, S. K.; Mohanta, H.; Kapoor, V.; Modi, A.; Mathur, R. P.; Sinha, R. 2017. Eco-geomorphological approach for environmental flows assessment in monsoon-driven highland rivers: a case study of Upper Ganga, India. Journal of Hydrology: Regional Studies, 13:110-121. [doi: https://doi.org/10.1016/j.ejrh.2017.07.005]
Environmental flows ; Assessment ; Geomorphology ; Highlands ; Rivers ; Flow discharge ; Monsoon climate ; Dams ; Fishes ; Species ; Ecosystems ; Case studies / India / Upper Ganga Basin
(Location: IWMI HQ Call no: e-copy only Record No: H048328)
http://www.sciencedirect.com/science/article/pii/S2214581816301471/pdfft?md5=4276b5bae230a6edf6fd9c53633f9c73&pid=1-s2.0-S2214581816301471-main.pdf
https://vlibrary.iwmi.org/pdf/H048328.pdf
https://vlibrary.iwmi.org/pdf/H048328.pdf
(1.12 MB) (1.12 MB)
Study region: Upper Ganga reaches up to Rishikesh town, India.
Study focus: Environmental Flows (E-Flows) assessment in the upper stretches of the Ganga river has been carried out by integrating ecological and geomorphological parameters with hydraulic analysis to estimate the flow depths and flow volumes necessary for river ecology and channel maintenance. We have used a modified version of Building Block Method (BBM) for computing E-Flows for lean period, for monsoon period and for high floods based on the flow requirements of keystone species for different sites and geomorphic considerations. We define three flow depths, D1, D2 and D3 which correspond to the minimum flow depths required for sustenance of keystone species during lean period, for breeding and spawning of keystone species during monsoon period, and for maintaining lateral connectivity during floods respectively.
New hydrological insights for the region: Annual hydrographs for E-Flows have been developed and compared with the observed flows for each site under natural flow conditions. Our computation shows that for the wet period, which is taken as the period from mid-May to mid-October, monthly E-Flows vary from ~23% to ~40% of the monthly natural flows at different sites. However, dry season E-Flows as percentages of natural flows, taken for the period from mid-October to mid-May, vary over a wider range of 29%–53% for these sites.
Study focus: Environmental Flows (E-Flows) assessment in the upper stretches of the Ganga river has been carried out by integrating ecological and geomorphological parameters with hydraulic analysis to estimate the flow depths and flow volumes necessary for river ecology and channel maintenance. We have used a modified version of Building Block Method (BBM) for computing E-Flows for lean period, for monsoon period and for high floods based on the flow requirements of keystone species for different sites and geomorphic considerations. We define three flow depths, D1, D2 and D3 which correspond to the minimum flow depths required for sustenance of keystone species during lean period, for breeding and spawning of keystone species during monsoon period, and for maintaining lateral connectivity during floods respectively.
New hydrological insights for the region: Annual hydrographs for E-Flows have been developed and compared with the observed flows for each site under natural flow conditions. Our computation shows that for the wet period, which is taken as the period from mid-May to mid-October, monthly E-Flows vary from ~23% to ~40% of the monthly natural flows at different sites. However, dry season E-Flows as percentages of natural flows, taken for the period from mid-October to mid-May, vary over a wider range of 29%–53% for these sites.
2 Mabhaudhi, Tafadzwanashe; Senzanje, A.; Modi, A.; Jewitt, G.; Massawe, F. (Eds.) 2022. Water - energy - food nexus narratives and resource securities: a global south perspective. Amsterdam, Netherlands: Elsevier. 332p. [doi: https://doi.org/10.1016/C2020-0-03951-4]
Water resources ; Energy resources ; Food security ; Nexus ; Sustainable Development Goals ; Goal 2 Zero hunger ; Goal 6 Clean water and sanitation ; Goal 7 Affordable and clean energy ; Transboundary waters ; Catchment areas ; Public health ; Environmental health ; Ecosystems ; Financing ; Smallholders ; Farmers ; Capacity development ; SADC countries ; Spatial data ; Modelling ; Case studies / Southern Africa / Middle East / North Africa / Latin America / South Asia / South East Asia / United Republic of Tanzania / Malawi / Zimbabwe / Malaysia / Jordan / Morocco / Argentina / Brazil / Songwe River Basin / Tugwi-Mukosi Dam
(Location: IWMI HQ Call no: e-copy SF Record No: H051168)
(0.13 MB)
3 Mpandeli, S.; Nhamo, L.; Senzanje, A.; Jewitt, G.; Modi, A.; Massawe, F.; Mabhaudhi, Tafadzwanashe. 2022. The water-energy-food nexus: its transition into a transformative approach. In Mabhaudhi, Tafadzwanashe; Senzanje, A.; Modi, A.; Jewitt, G.; Massawe, F. (Eds.). Water - energy - food nexus narratives and resource securities: a global south perspective. Amsterdam, Netherlands: Elsevier. pp.1-13. [doi: https://doi.org/10.1016/B978-0-323-91223-5.00004-6]
(Location: IWMI HQ Call no: e-copy only Record No: H051169)
(0.30 MB)
Water, energy, and food are vital resources for human wellbeing. Yet, they are under increased pressure to meet demand from a growing population at a time of worsening insecurity due to depletion and degradation of reserves. These challenges prompted the formulation of the Sustainable Development Goals (SDGs) in 2015. All the 17 SDGs are connected. They recognize that developments in one sector will impact other sectors and that any proposed development must balance socioeconomic and environmental sustainability. Also, as the three resources are the most impacted by climate change, they provide a close link between adaptation, climate system, human society, and the environment. The intricate interlinkages between water, energy, and food resources with the related relationships with socioeconomic development, healthy ecosystems, human development, and sustainable development caused the rapid growth of the water–energy–food (WEF) nexus concept since the United Nations General Assembly of September 2015. Although the concept existed before 2015, its progression increased after the World Economic Forum of 2011 after a presentation by the Stockholm Environment Institute (SEI) in anticipation of the SDGs. This chapter discusses the evolution of the WEF nexus before and after 2015. The emphasis is on the importance of the concept in establishing the interconnectedness of resources and as a guide for coherent policy decisions that lead to sustainable development.
4 Mabhaudhi, Tafadzwanashe; Senzanje, A.; Modi, A.; Jewitt, G.; Massawe, F. 2022. WEF nexus narratives: toward sustainable resource security. In Mabhaudhi, Tafadzwanashe; Senzanje, A.; Modi, A.; Jewitt, G.; Massawe, F. (Eds.). Water - energy - food nexus narratives and resource securities: a global south perspective. Amsterdam, Netherlands: Elsevier. pp.321-326. [doi: https://doi.org/10.1016/B978-0-323-91223-5.00009-5]
(Location: IWMI HQ Call no: e-copy only Record No: H051173)
(0.07 MB)
The water–food–energy (WEF) nexus narratives is a collection of expert inputs on the concepts, analytical tools and case studies, and key developments on the importance and applicability of the WEF nexus as a transformative and circular approach. This chapter provides a detailed summary of each chapter, providing the reader with what has been achieved through the WEF nexus application. The chapters provide practical applications of integrated resource management and the pathways toward sustainable development. The main subjects of discussion include data availability, modeling tools, indices development, and metrics and their application across multiple spatiotemporal scales.
5 Nhamo, L.; Paterson, G.; van der Walt, M.; Moeletsi, M.; Modi, A.; Kunz, R.; Chimonyo, V.; Masupha, T.; Mpandeli, S.; Liphadzi, S.; Molwantwa, J.; Mabhaudhi, Tafadzwanashe. 2022. Optimal production areas of underutilized indigenous crops and their role under climate change: focus on Bambara groundnut. Frontiers in Sustainable Food Systems, 6:990213. [doi: https://doi.org/10.3389/fsufs.2022.990213]
Crop production ; Bambara groundnut ; Vigna subterranea ; Underutilized species ; Indigenous organisms ; Climate change adaptation ; Strategies ; Resilience ; Dryland farming ; Land suitability ; Food security ; Water security ; Rain ; Geographical information systems / South Africa / Limpopo
(Location: IWMI HQ Call no: e-copy only Record No: H051486)
https://www.frontiersin.org/articles/10.3389/fsufs.2022.990213/pdf
https://vlibrary.iwmi.org/pdf/H051486.pdf
https://vlibrary.iwmi.org/pdf/H051486.pdf
(2.66 MB) (2.66 MB)
Food demand in Africa continues to outstrip local supply, and the continent currently spends over US$35 billion annually on food imports to supplement local deficits. With the advances in agronomy and breeding, commercial crops like maize (Zea mays) and soybean (Glycine max) in the region are under threat from climate change, decreasing rainfall and degraded lands. Unlike commercial crops that are generally adapted from other regions, underutilized indigenous crops are uniquely suited to local environments and are more resilient to climatic variations and tolerant to local pests and diseases. This study, done in Limpopo Province, South Africa, identifies optimal areas for cultivating Bambara groundnuts (Vigna subterannea), an indigenous crop suitable for arid and semi-arid regions. The aim is to promote the production of underutilized indigenous crops at a large scale with fewer resources, while still meeting local demand and reducing the food import budget. Suitability maps are delineated using a multicriteria decision method in a Geographic Information System (GIS). The procedure is important for diversifying farming systems, making them more resilient (to biotic and abiotic stresses and climate change) and more successful at enhancing water, food and nutritional security. With the province’s limited water and land resources for agriculture expansion, promoting indigenous underutilized crops is a pathway to reduce water allocated to agriculture, thereby enhancing drought resilience and ensuring water, food and nutritional security. Large tracts of degraded agricultural land deemed unsuitable for adapted crops, and which may require costly land reclamation practices, can be used to cultivate underutilized crops that are adapted to extreme local conditions.
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