Your search found 5 records
1 Samarakoon, J.; van Zon, H. (Eds.) 1991. Environmental profile of Muthurajawela and Negombo lagoon. Colombo, Sri Lanka: Greater Colombo Economic Commission (GCEC); Arnhem, Netherlands: Euroconsult. 173p.
Environmental protection ; Water management ; Hydrology ; Climatic data ; Drainage systems ; Swamps ; Natural resources ; Ecosystems ; Vegetation ; Aquatic plants ; Mangroves ; Marshes ; Lagoons ; Mammals ; Birds ; Reptiles ; Amphibians ; Fishes ; Invertebrates ; Geology ; Soils ; Socioeconomic environment ; Sustainable development ; Public health ; Infrastructure ; Industrialization ; Corporate culture ; Urbanization ; Land use ; Agricultural development ; Fisheries ; Aquaculture ; Legal aspects / Sri Lanka / Negombo Lagoon / Muthurajawela
(Location: IWMI HQ Call no: e-copy SF Record No: H047341)
(0.27 MB)
2 Mateo-Sagasta, Javier; Tare, V. 2016. Ganga water quality: dirty past, promising future? In Bharati, Luna; Sharma, Bharat R.; Smakhtin, Vladimir (Eds.). The Ganges River Basin: status and challenges in water, environment and livelihoods. Oxon, UK: Routledge - Earthscan. pp.222-237. (Earthscan Series on Major River Basins of the World)
Water quality ; Water pollution ; Surface water ; Industrial wastewater ; Agricultural wastes ; Pesticides ; Urban wastes ; Solid wastes ; Sewage ; Public health ; Sanitation ; Ecosystems ; Fishes ; Economic impact ; Flow discharge ; River basin management ; Action plans ; Development programmes ; Appropriate technology ; Institutional development ; Stakeholders ; Financing / India / Ganga River Basin
(Location: IWMI HQ Call no: IWMI Record No: H047816)
3 Manthrithilake, Herath. 2016. Lagoons of Sri Lanka. In Fernando, S. (Ed.); Nadaraja, L. (Photographer). Sri Lanka: a heritage of water. [s.l.]: Author. pp.135-145.
Coastal lagoons ; Ecosystems ; Biodiversity ; Aquatic animals ; Species ; Habitats ; Fishes ; Zooplankton ; Mangroves ; Saltmarshes ; Seagrasses ; Human behavior / Sri Lanka
(Location: IWMI HQ Call no: 333.91 G744 FER Record No: H047922)
(2.28 MB)
4 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.
5 Hoque, Md. M.; Islam, A.; Ghosh, S. 2022. Environmental flow in the context of dams and development with special reference to the Damodar Valley Project, India: a review. Sustainable Water Resources Management, 8(3):62. [doi: https://doi.org/10.1007/s40899-022-00646-9]
Environmental flows ; Dams ; Rivers ; Aquatic organisms ; Fishes ; Aquatic ecosystems ; Water pollution ; Water quality ; Water resources ; Freshwater ; Stream flow ; Downstream ; Hydropower ; Monsoons ; Socioeconomic aspects ; Sustainability / India / West Bengal / Damodar Valley Project / Damodar River
(Location: IWMI HQ Call no: e-copy only Record No: H051181)
(4.05 MB)
Environmental flow is the minimum flow required in a fluvial system to maintain its ecological health and to promote socio-economic sustainability. The present work critically examines the concept of the environmental flow in the context of dams and development using a systematic methodology to find out the previous works published during the last 3 decades (1990–2020) in different search engines and websites. The study reviews that structural interventions in the form of dams, barrages, weirs, etc. impede the natural flow of the rivers. Moreover, other forms of development such as industrialization, urbanization, and expansion of modern agriculture also exacerbate the problems of environmental flow across the world, especially in monsoon Asia. The present case of the environmental flow for the Damodar River portrays that the construction of dams and barrages under the Damodar Valley Project have significantly altered the flow duration, flood frequency, and magnitude (high-frequency low magnitude events in the post-dam period), while urban-industrial growth in the basin has polluted the river water (e.g., lower dissolved oxygen and higher biological oxygen demand). This typical alteration in the flow characteristics and water quality has threatened aquatic organisms, especially fish diversity and community structure. This review will make the readers aware of the long-term result of dam-induced fluvial metamorphosis in the environment through the assessment of environmental flow, species diversity, flow fluctuation, and river pollution. The study may be useful for policy-making for ushering in the sustainable development pattern that will attract future researchers, planners, and stakeholders.
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