Your search found 16 records
1 Makurira, H.; Mapani, B.; Mazvimavi, D.; Mul, Marloes; Wepener, V. 2013. Putting science into practice. Editorial. Physics and Chemistry of the Earth, 66:1-3. [doi: https://doi.org/10.1016/j.pce.2013.10.011]
(Location: IWMI HQ Call no: e-copy only Record No: H046233)
(0.15 MB)
2 van der Kwast, J.; Yalew, S.; Dickens, C.; Quayle, L.; Reinhardt, J.; Liersch, S.; Mul, Marloes; Hamdard, M.; Douven, W. 2013. A framework for coupling land use and hydrological modelling for management of ecosystem services. International Journal of Environmental Monitoring and Analysis, 1(5):230-236. [doi: https://doi.org/10.11648/j.ijema.20130105.18]
Land use ; Hydrology ; Simulation models ; Ecosystem services ; Water management ; Water resources ; Indicators / South Africa / KwaZulu-Natal Province / uThukela Catchment
(Location: IWMI HQ Call no: e-copy only Record No: H046237)
http://article.sciencepublishinggroup.com/pdf/10.11648.j.ijema.20130105.18.pdf
https://vlibrary.iwmi.org/pdf/H046237.pdf
https://vlibrary.iwmi.org/pdf/H046237.pdf
(0.51 MB) (525.01KB)
It is well known that land-use changes influence the hydrological cycle and that those changes in the hydrological cycle influence land use. The sophisticated spatial dynamic planning tools that have been developed in the last decades to support policy makers in the decision making process do not take into account the mutual feedbacks between land use and hydrology. In this study a framework for an integrated spatial decision support system is presented where the feedbacks between land use and hydrology are taken into account by coupling the SITE (Simulation of Terrestrial Environments) land-use model to the SWIM hydrological model. This framework enables policy makers to assess the impact of their planning scenarios on ecosystem services using a web-based tool that interactively presents trends in space and time of spatial indicators derived from both models. This approach is tested for the uThukela area, which is located along the northern areas of the Drakensberg Mountains which form the border between Lesotho and South Africa. The region is extremely important for its catchment-services as water derived from it is pumped into the Vaal River supplying water to the city of Johannesburg. Because of poor management of ecosystem services, less water is produced by the catchment more erratically, siltation levels are increasing and less carbon is retained in the soil. Biodiversity is threatened by grazing livestock, alien plants and other poor land management practices. In addition, overstocking, frequent burning and lack of soil protection measures have caused rill and gully erosion in areas of communal ownership where an overall management policy is lacking. The presented framework for a spatial integrated decision support system is currently being implemented and will be used by policy makers to assess policies developed for an Environmental Management Framework (EMF). Scenarios will be defined during stakeholder workshops. A prototype of the decision support system has been developed, but not all data necessary for modelling and calibration is yet available. From the analysis of land-use maps of 2005 and 2008 it was observed that forest and bush decreased, while settlements, subsistence farming, commercial farming and grassland increased.
3 Makurira, H.; Mapani, B.; Mazvimavi, D.; Mul, Marloes; Tapela, B.; Wepener, V. 2014. Implementing water science research to benefit all. Editorial. Physics and Chemistry of the Earth, 67-69:1-3.
Hydrology ; Models ; Water resources ; Water management ; Water security ; Water scarcity ; Water supply ; Environmental aspects ; Sanitation
(Location: IWMI HQ Call no: e-copy only Record No: H046485)
(0.18 MB)
4 Mul, Marloes; Obuobie, E.; Appoh, Richard; Kankam-Yeboah, K.; Bekoe-Obeng, E.; Amisigo, B.; Logah, F. Y.; Ghansah, Benjamin; McCartney, Matthew. 2015. Water resources assessment of the Volta River Basin. Colombo, Sri Lanka: International Water Management Institute (IWMI) 78p. (IWMI Working Paper 166) [doi: https://doi.org/10.5337/2015.220]
Water resources ; Environmental impact assessment ; River basins ; International waters ; Water management ; Water governance ; Water quality ; Water use ; Water demand ; Water power ; Water availability ; Ecosystem services ; Natural resources ; Infrastructure ; Wetlands ; Lakes ; Dams ; Policy making ; Strategies ; Livestock ; Fishing ; Industry ; Geology ; Soils ; Sedimentation ; Land use ; Hydrology ; Energy generation ; Riparian zones ; Institutions ; Economic aspects / Ghana / Burkina Faso / Volta River Basin
(Location: IWMI HQ Call no: IWMI Record No: H047413)
(2 MB)
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 Volta 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.
5 Mul, Marloes; Obuobie, E.; Appoh, Richard; Kankam-Yeboah, K.; Bekoe-Obeng, E.; Amisigo, B.; Logah, F. Y.; Ghansah, Benjamin; McCartney, Matthew. 2015. Evaluation des ressources en eau du bassin de la Volta. In French. [Water resources assessment of the Volta River Basin]. Colombo, Sri Lanka: International Water Management Institute (IWMI) 84p. (Also in English) (IWMI Working Paper 166/Document de travail IWMI 166) [doi: https://doi.org/10.5337/2016.201]
Water resources ; Environmental impact assessment ; River basins ; International waters ; Water management ; Water governance ; Water quality ; Water use ; Water demand ; Water power ; Water availability ; Ecosystem services ; Natural resources ; Infrastructure ; Wetlands ; Lakes ; Dams ; Policy making ; Strategies ; Livestock ; Fishing ; Industry ; Geology ; Soils ; Sedimentation ; Land use ; Hydrology ; Energy generation ; Riparian zones ; Institutions ; Economic aspects / Ghana / Burkina Faso / Volta River Basin
(Location: IWMI HQ Call no: IWMI Record No: H047580)
(24 KB)
Le projet « WISE UP to climate » vise a demontrer l'utilite des infrastructures naturelles comme une « solution basee sur la nature » pour l'adaptation au changement climatique et le developpement durable. Dans le bassin de la Volta, les infrastructures naturelles, comme les construites, offrent des benefices pour la subsistance des personnes. Comprendre les interrelations entre ces deux types d'infrastructures est une condition indispensable a une gestion et un developpement durables des ressources en eau. Cela est particulierement vrai dans un contexte ou les pressions sur les ressources en eau s'intensifient, et ou les impacts du changement climatique augmentent. Ce rapport donne un apercu des caracteristiques biophysiques, des services ecosystemiques, et de leur relation avec les moyens de subsistance dans le bassin.
6 Mapani, B.; Magole, L.; Makurira, H.; Mazvimavi, D.; Meck, M.; Mul, Marloes. 2016. Managing ground and surface water resources using innovative methods in rural and urban areas of Sub-Saharan Africa. Physics and Chemistry of the Earth, 93:1.
Groundwater management ; Surface water ; Water resources ; Water quality ; Rural areas ; Urban areas ; Hydrology ; Wetlands ; Land use ; Women ; Climate change ; Ecosystems ; Farmers / Africa South of Sahara
(Location: IEMI HQ Call no: e-copy only Record No: H047629)
7 Mapani, B.; Meck, M.; Makurira, H.; Magole, L.; Mashauri, D.; Mazvimavi, D.; Mul, Marloes. 2016. Water: the conveyor belt for sustainable livelihoods and economic development. Physics and Chemistry of the Earth, 92:1-2. [doi: https://doi.org/10.1016/j.pce.2016.04.005]
Economic development ; Sustainable development ; Living standards ; Water resources ; Water management ; Water quality ; Drinking water ; Groundwater ; Wastewater
(Location: IWMI HQ Call no: e-copy only Record No: H047627)
8 Williams, Timothy O.; Mul, Marloes; Cofie, Olufunke; Kinyangi, J.; Zougmore, R.; Wamukoya, G.; Nyasimi, M.; Mapfumo, P.; Speranza, C. I.; Amwata, D.; Frid-Nielsen, S.; Partey, S.; Girvetz, E.; Rosenstock, T.; Campbell, B. 2015. Climate smart agriculture in the African context. Background Paper. Paper presented at the Feeding Africa - An Action Plan for African Agricultural Transformation. Session 1: Unlocking Africa’s Agricultural Potentials for Transformation to Scale, Dakar, Senegal, 21-23 October 2015. 26p.
Agriculture ; Climate change ; Food security ; Poverty ; Smallholders ; Farmers ; Ecosystems ; Economic aspects ; Sustainable development ; Investment ; Socioeconomic environment ; Gender ; Women ; Youth ; Empowerment ; Financing ; Policy making / Africa
(Location: IWMI HQ Call no: e-copy only Record No: H048252)
http://www.worldagroforestry.org/downloads/Publications/PDFS/WP16087.pdf
https://vlibrary.iwmi.org/pdf/H048252.pdf
https://vlibrary.iwmi.org/pdf/H048252.pdf
9 Mapani, B.; Magole, L.; Makurira, H.; Meck, M.; Mkandawire, T.; Mul, Marloes. 2017. Integrated water resources management and infrastructure planning for water security in southern Africa. Physics and Chemistry of the Earth, 100:1-2. [doi: https://doi.org/10.1016/j.pce.2017.08.001]
Integrated management ; Water resources ; Water management ; Water security ; Water productivity ; Infrastructure ; Planning ; Hydrology ; Environmental effects ; Land development / sothern Africa
(Location: IWMI HQ Call no: e-copy only Record No: H048266)
10 Ofosu, E. A.; Mul, Marloes; Boateng-Gyimah, M.; Annor, F.; Ampomah, B. Y. 2017. Overview of the re-operation and re-optimisation of the Akosombo and Kpong Dams Project. In Ntiamoa-Baidu, Y.; Ampomah, B. Y.; Ofosu, E. A. (Eds.). Dams, development and downstream communities: implications for re-optimising the operations of the Akosombo and Kpong Dams in Ghana. Tema, Ghana: Digibooks Ghana Ltd. pp.3-25.
Dam construction ; Water power ; Water allocation ; Downstream ; Living standards ; Weeds ; Climate change ; Socioeconomic environment / Ghana / Akosombo / Kpong Dam
(Location: IWMI HQ Call no: e-copy only Record No: H048402)
11 Mul, Marloes; Ofosu, E. A.; Mante, Y.; Ghansah, Benjamin; Annor, F. O.; Boateng-Gyimah, M. 2017. Defining restoration flow targets to restore ecological functions and livelihoods in the lower Volta Basin. In Ntiamoa-Baidu, Y.; Ampomah, B. Y.; Ofosu, E. A. (Eds.). Dams, development and downstream communities: implications for re-optimising the operations of the Akosombo and Kpong Dams in Ghana. Tema, Ghana: Digibooks Ghana Ltd. pp.185-209.
Ecological factors ; Living standards ; Environmental flows ; Dam construction ; River basins ; Ecosystem services ; Fisheries ; Dry season ; Wet season ; Aquatic weeds ; Groundwater ; Flooding ; Sediment ; Health ; Infrastructure ; Aquaculture ; Irrigation / Ghana / Volta Basin / Akosombo / Kpong Dams
(Location: IWMI HQ Call no: e-copy only Record No: H048403)
12 Annor, F. O.; Boateng-Gyimah, M.; Mul, Marloes; Padi, P.; Adwubi, A.; Darkwa, K.; Addo, C. 2017. Trade-offs between hydropower production and downstream flow requirements. In Ntiamoa-Baidu, Y.; Ampomah, B. Y.; Ofosu, E. A. (Eds.). Dams, development and downstream communities: implications for re-optimising the operations of the Akosombo and Kpong Dams in Ghana. Tema, Ghana: Digibooks Ghana Ltd. pp.211-230.
Water power ; Downstream ; Water allocation ; Dam construction ; Environmental flows ; Ecosystems ; Climate change ; Models ; Stream flow ; Water demand ; River baisns / Ghana / Volta basin
(Location: IWMI HQ Call no: e-copy only Record No: H048404)
13 Mul, Marloes; Pettinotti, L.; Amonoo, Naana Adwoa; Bekoe-Obeng, E.; Obuobie, E. 2017. Dependence of riparian communities on ecosystem services in northern Ghana. Colombo, Sri Lanka: International Water Management Institute (IWMI). 43p. (IWMI Working Paper 179) [doi: https://doi.org/10.5337/2018.201]
Ecosystem services ; Riparian zones ; Communities ; Participatory rural appraisal ; Socioeconomic environment ; Living standards ; Mapping ; Seasonality ; Natural resources ; Infrastructure ; Forest reserves ; Shrubs ; Woodlands ; Water storage ; Ponds ; Dams ; River basins ; Stream flow ; Floodplains ; Household consumption ; Domestic consumption ; Gender ; Climate change ; Rain ; Dry season ; Food security ; Income ; Agriculture / Ghana
(Location: IWMI HQ Call no: IWMI Record No: H048466)
(1 MB)
This study investigated the dependence of three riparian communities on ecosystem services in northern Ghana. Participatory mapping and ranking exercises in gender-segregated groups were used to elicit information on the communities’ livelihoods. The most important ecosystem-based activities (EBA) are farming, fishing, livestock watering and grazing, collection of wild fruits and vegetables, and provision of water for domestic use. The major EBA are dependent on the seasonal flows of the White Volta River, which are under pressure due to climatic and other anthropogenic changes. For example, observed delays in the start of the rainy season are affecting rainfed agricultural activities on the floodplains. Delayed planting on the floodplains results in damage to, or loss of, crops as floods arrive before the harvest. Moreover, the Bagré Dam in Burkina Faso, built upstream of the communities, has impacted the natural river flow. The planned Pwalugu Dam may, depending on the final operations, support or affect EBA. We, therefore, recommend that operations of the Pwalugu Dam should take into consideration the flow requirements of EBA downstream of the dam.
14 Mapani, B.; Makurira, H.; Magole, L.; Meck, M.; Mkandawire, T.; Mul, Marloes; Ngongondo, C. 2018. Innovative solutions for intractable water problems in the face of climate change in southern and East African sub regions. Physics and Chemistry of the Earth, 105:1-2.
Climate change ; Water supply ; Water resources ; Water management ; Water use ; Water governance ; Water law ; Water allocation ; Urban areas ; Hydrogeology ; Human behaviour ; Land use / East Africa / South Africa
(Location: IWMI HQ Call no: e-copy only Record No: H048784)
15 Adimassu, Zenebe; Mul, Marloes; Owusu, Afua; Barron, Jennie; Kadyampakeni, Davie; Cofie, Olufunke O. 2016. Smallholder irrigation productivity for sustainable intensification: water balances for high value crops in northern Ghana. Ibadan, Nigeria: International Institute of Tropical Agriculture (IITA). 35p.
Smallholders ; Irrigation systems ; Water productivity ; Sustainability ; Intensification ; Water balance ; Estimation ; Rain ; Dry season ; Dry spells ; Rainfed farming ; Water management ; Crops ; Plant developmental stages ; Maize ; Vegetables ; Yield response functions ; Soil profiles ; Soil types ; Models / Ghana / Navrongo
(Location: IWMI HQ Call no: e-copy only Record No: H049041)
https://cgspace.cgiar.org/bitstream/handle/10568/83313/AR_WA_water_balance_dec2016.pdf?sequence=1&isAllowed=y
https://vlibrary.iwmi.org/pdf/H049041.pdf
https://vlibrary.iwmi.org/pdf/H049041.pdf
(1.63 MB) (1.63 MB)
16 Adimassu, Zenebe; Mul, Marloes; Owusu, Afua. 2023. Intra-seasonal rainfall variability and crop yield in the Upper East Region of Ghana. Environment, Development and Sustainability, 20p. (Online first) [doi: https://doi.org/10.1007/s10668-023-03861-2]
Rainfall patterns ; Seasonal variation ; Crop yield ; Water requirements ; Dry spells ; Rainfed farming ; Maize ; Millets ; Sorghum ; Sowing date ; Water deficit ; Water management ; Climatic data ; Soil profiles ; Models / West Africa / Ghana / Navrongo / Zuarungu
(Location: IWMI HQ Call no: e-copy only Record No: H052251)
(1.07 MB)
Occurrence of frequent dryspell is affecting agriculture; productivity in the semi-arid areas of West Africa such as northern Ghana. The objective of this study was to analyze the effects of dryspells on rainfed maize (early and late maturing), millet, and sorghum yields in a savanna agro-ecosystem in northern Ghana, and suggest management options for reducing their impacts. Long-term dryspell analyses were carried out using INSTAT + v3.37 on climatic data collected over a 30- to 50-year period. The probabilities of dryspells exceeding 7, 10, 14 and 21 days were calculated for crop types during different physiological growth stages and growing seasons of varying lengths. CROPWAT 8.0 was used to determine effective rainfall, crop water requirement, crop water deficit, and changes in yield. The results showed that 80% of the rains begin between the second week of May and the third week of June in the Upper East Region of Ghana. The result also revealed that more dryspells occurred after the initial growth stage of crops. During mid and late stages of crop growth there was a 50% probability of dryspells greater than seven days for early maturing maize and millet and of > 70% for sorghum. Late maturing maize experienced higher crop water deficit than early maturing maize. The result also showed that significant yield reduction (36% reduction in late maturing maize at both Navrongo and Zuarungu) occurs if planting is done before May 21. Similarly, 25 and 23% yield losses, were observed in sorghum at Navrongo and Zuarungu, respectively. We therefore recommend (i) early maturing crop varieties, (ii) adjusting sowing dates based on seasonal climate information, and (iii) improving water management.
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