Your search found 9 records
1 Tren, R.; Schur, M. 2000. Olifants River irrigation schemes: reports 1 and 2. Report 1 - Crop and irrigation data for four separate irrigation schemes. Report 2 - Irrigation management structures for four separate irrigation schemes. Colombo, Sri Lanka: International Water Management Institute (IWMI). iv, 32p. (IWMI Working Paper 003 / IWMI South Africa Working Paper 5) [doi: https://doi.org/10.3910/2009.140]
Water management ; Water supply ; Costs ; Income distribution ; Water demand ; Economic aspects ; Models ; Irrigation systems ; Irrigated farming ; Irrigation requirements ; Resource management ; Local management ; Political aspects ; Catchment areas ; Crop production ; Data collection ; History ; Farmers' associations ; River basins ; Performance evaluation / South Africa / Olifants River / Loskop Irrigation scheme / Hereford Irrigation Scheme / Coetzeesdraai Irrigation Scheme / Hindostan Irrigation Scheme
(Location: IWMI HQ Call no: IWMI 631.7.8 G178 TRE Record No: H027232)
(772 KB)
Report 1 documents key data affecting crop budgets and water supply costs in several Olifants Basin irrigation schemes. The data will be used to develop an irrigation water-pricing model to describe supply-side and demand side forces. Report 2 investigates the management and operations of these schemes. It compares farming and irrigation practices in several different types of schemes - a government-run scheme, a private commercial scheme and two small irrigation schemes managed by black farmers.
2 Ligthelm, M. 2001. Olifants water management area: catchment management agency establishment. In Abernethy, C. L. (Ed.). Intersectoral management of river basins. Proceedings of an International Workshop on Integrated Water Management in Water-Stressed River Basins in Developing Countries: Strategies for Poverty Alleviation and Agricultural Growth, Loskop Dam, South Africa, 16-21 October 2000. Colombo, Sri Lanka: International Water Management Institute (IWMI); Feldafing, Germany: German Foundation for International Development (DSE). pp.23-43.
River basins ; Catchment areas ; Water resource management ; Institution building ; Financing ; Water users ; Water law ; Farmer participation ; Social participation ; Conflict ; Price policy / South Africa / Olifants River
(Location: IWMI HQ Call no: IWMI 333.91 G000 ABE Record No: H029112)
(0.83)
3 Rountree, M. W.; Heritage, G. L.; Rogers, K. H. 2001. In-channel metamorphosis in a semiarid, mixed bedrock/alluvial river system: Implications for instream flow requirements. In Acreman, M. C. (Ed.), Hydro-ecology: Linking hydrology and aquatic ecology. Wallingford, UK: IAHS. pp.113-123.
(Location: IWMI-HQ Call no: 551.48 G000 ACR Record No: H029736)
4 Ladki, Marvan; Seshoka, Jetrick; Faysse, Nicolas; Lévite, Herve; van Koppen, Barbara. 2004. Possible impacts of the transformation of water infrastructure on productive water uses: The case of the Seokodibeng village in South Africa. Colombo, Sri Lanka: International Water Management Institute (IWMI) ix, 45p. (IWMI Working Paper 074) [doi: https://doi.org/10.3910/2009.261]
Water user associations ; Water supply ; Social participation ; Land use ; Water use ; Villages ; History ; Domestic water ; Irrigation water ; Food security ; Sanitation ; Cost recovery ; Project management ; Pipes ; Water balance ; Livestock / South Africa / Seokodibeng Village / Olifants River / Lebalelo / Seokodibeng
(Location: IWMI-HQ Call no: IWMI 631.7.3 G178 LAD Record No: H035860)
(1.45 MB)
5 McCartney, Matthew Peter; Yawson, Daniel. K.; Magagula, Thulani F.; Seshoka, Jetrick. 2004. Hydrology and water resources development in the Olifants River Catchment. Colombo, Sri Lanka: International Water Management Institute (IWMI) vii, 50p. (IWMI Working Paper 076) [doi: https://doi.org/10.3910/2009.262]
River basins ; Catchment areas ; Hydrology ; Rain ; Evaporation ; Water resources development ; Flow measurement ; Dams ; Groundwater ; Water transfer ; Irrigation water ; Research priorities / South Africa / Olifants River
(Location: IWMI-HQ Call no: IWMI 551.48 G178 MCC Record No: H035861)
(772 KB)
6 Levite, H.; Sally, H. 2002. Linkages between productivity and equitable allocation of water. Physics and Chemistry of the Earth, 27:825-830.
Water allocation ; Equity ; Productivity ; River basins ; Water management / South Africa / Olifants river
(Location: IWMI-SA Call no: IWMI 631.7.1 G178 LEV Record No: H031502)
Also published: Proceedings of the 2nd WARSFA/ Waternet Symposium on Integrated Water Resources Management: Theory, Practice, Cases. Cape Town, 30-31 October 2001
7 Cullis, J.; van Koppen, Barbara. 2007. Applying the Gini Coefficient to measure inequality of water use in the Olifants River water management area, South Africa. Colombo, Sri Lanka: International Water Management Institute (IWMI). 19p. (IWMI Research Report 113) [doi: https://doi.org/10.3910/2009.113]
River basin management ; Water stress ; Water use ; Indicators ; Households ; Rural areas ; Irrigation programs / South Africa / Olifants River
(Location: IWMI HQ Call no: IWMI 333.91 G178 CUL Record No: H040313)
(368KB)
The present study explores the application of the Gini Coefficient, which has hitherto only been used for income and land distribution, to quantify the distribution of water resources. The tool is tested in the water-stressed Olifants Water Management Area, in South Africa. Using readily available information on water use registrations, water use estimates, and census data, two versions of the Gini Coefficient are calculated. The first measures the distribution of the allocation of direct water use in rural areas and was estimated at 0.96 in the study area. In other words, 99.5 percent of the rural households are entitled to useonly 5 percent of the available water. The second version calculates the distribution of the indirect benefits of water use in the form of direct employment. This is shown to have a Gini Coefficient of 0.64. Using the Gini Coefficient an assessment was also made of the impacts of different policy scenarios. It was found that by more than doubling the amount of water used by rural households from the current 225 cubic meters per household per annum (m3/hh/annum) to 610 m3/hh/annum, which would enable each household to meet its basic human needs of 50 litres/person/day and irrigate 1,000 square meters (m2), would reduce the Gini Coefficient significantly. Yet, this would only require the large-scale registered users to reduce their current irrigation water use entitlement by 6 percent or the largest ten users to reduce their use by 20 percent each.
8 McCartney, Matthew; Morardet, S.; Rebelo, Lisa-Maria; Finlayson, C. M.; Masiyandima, M. 2011. A study of wetland hydrology and ecosystem service provision: GaMampa wetland, South Africa. Hydrological Sciences Journal, 56(8):1452-1466. [doi: https://doi.org/10.1080/02626667.2011.630319]
Wetlands ; Hydrology ; Ecosystems ; Flow ; Dry season ; Economic aspects ; Economic analysis ; Land cover / South Africa / GaMampa wetland / Mohlapitsi River / Olifants River
(Location: IWMI HQ Call no: e-copy only Record No: H044592)
(3.37 MB)
The GaMampa wetland, a palustrine wetland, comprises less than 1% of the catchment but is widely believed to make a significant contribution to dry-season river flow in the Mohlapitsi River, a tributary of the Olifants River, in South Africa. The contribution of the GaMampa wetland to dry-season flow in the Mohlapitsi River and the impact of increasing agriculture on its hydrological functioning were investigated. Economic analyses showed that the net financial value of the wetland was US$ 83,263 of which agriculture comprises 38%. Hydrological analyses indicated that the Mohlapitsi River contributes, on average, 16% of the dry-season flow in the Olifants River. However, the wetland contributes, at most, 12% to the increase in dry-season flow observed over the reach of the river in which the wetland is located. The remainder of the increase originates from groundwater flowing through the wetland. Furthermore, despite the conversion of 50% of the wetland to agriculture since 2001, there has been no statistically significant reduction in dry-season flow in the Mohlapitsi River. These results highlight the importance of understanding the nature of the full suite of services being provided by a wetland in order to make informed decisions for appropriate management.
9 Arthington, A. H.; Tickner, D.; McClain, M. E.; Acreman, M. C.; Anderson, E. P.; Babu, S.; Dickens, Chris W. S.; Horne, A. C.; Kaushal, N.; Monk, W. A.; O’Brien, G. C.; Olden, J. D.; Opperman, J. J.; Owusu, Afua G.; Poff, N. L.; Richter, B. D.; Salinas-Rodríguez, S. A.; Shamboko Mbale, B.; Tharme, R. E.; Yarnell, S. M. 2023. Accelerating environmental flow implementation to bend the curve of global freshwater biodiversity loss. Environmental Reviews, 27p. (Online first) [doi: https://doi.org/10.1139/er-2022-0126]
Environmental flows ; Freshwater ; Biodiversity ; Ecosystem services ; Resilience ; Rivers ; Water availability ; Water users ; Stakeholders ; Climate change ; Constraints ; Legislation ; Regulations ; Monitoring ; Funding ; Socioeconomic aspects ; Ecological factors ; Infrastructure ; Human resources ; Capacity development ; Training ; Case studies / USA / Guatemala / Mexico / Canada / UK / South Africa / Zambia / India / China / Australia / Putah Creek Tributary / Usumacinta River / Peace-Athabasca Delta / Savannah River / Roanoke River / Great Brak River Estuary / Olifants River / Luangwa River / Nile River Basin / Ramganga River / Yangtze River / Lower Goulburn River
(Location: IWMI HQ Call no: e-copy only Record No: H052092)
(1.91 MB) (1.91 MB)
Environmental flows (e-flows) aim to mitigate the threat of altered hydrological regimes in river systems and connected waterbodies and are an important component of integrated strategies to address multiple threats to freshwater biodiversity. Expanding and accelerating implementation of e-flows can support river conservation and help to restore the biodiversity and resilience of hydrologically altered and water-stressed rivers and connected freshwater ecosystems. While there have been significant developments in e-flow science, assessment, and societal acceptance, implementation of e-flows within water resource management has been slower than required and geographically uneven. This review explores critical factors that enable successful e-flow implementation and biodiversity outcomes in particular, drawing on 13 case studies and the literature. It presents e-flow implementation as an adaptive management cycle enabled by 10 factors: legislation and governance, financial and human resourcing, stakeholder engagement and co-production of knowledge, collaborative monitoring of ecological and social-economic outcomes, capacity training and research, exploration of trade-offs among water users, removing or retrofitting water infrastructure to facilitate e-flows and connectivity, and adaptation to climate change. Recognising that there may be barriers and limitations to the full and effective enablement of each factor, the authors have identified corresponding options and generalizable recommendations for actions to overcome prominent constraints, drawing on the case studies and wider literature. The urgency of addressing flow-related freshwater biodiversity loss demands collaborative networks to train and empower a new generation of e-flow practitioners equipped with the latest tools and insights to lead adaptive environmental water management globally. Mainstreaming e-flows within conservation planning, integrated water resource management, river restoration strategies, and adaptations to climate change is imperative. The policy drivers and associated funding commitments of the Kunming–Montreal Global Biodiversity Framework offer crucial opportunities to achieve the human benefits contributed by e-flows as nature-based solutions, such as flood risk management, floodplain fisheries restoration, and increased river resilience to climate change.
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