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Analyzing the enabling environment to enhance the scaling of irrigation and water management technologies
Minh, T. T.; Zwart, S.; Appoh, R.; Schmitter, P. 2021. Analyzing the enabling environment to enhance the scaling of irrigation and water management technologies: a tool for implementers. Colombo, Sri Lanka: International Water Management Institute (IWMI). 18p. (IWMI Working Paper 197). DOI: https://doi.org/10.5337/2021.201
Agro-climatic and hydrological characterization of selected watersheds in northern Ghana
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Public Participation in Environmental Impact Assessment of Hydropower Plants in Nepal
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Smallholder irrigation schemes in the Limpopo Province, South Africa
A survey of 76 public smallholder irrigation schemes in the Limpopo Province was jointly conducted by the International Water Management Institute (IWMI), Department of Agriculture, Forestry and Fisheries (DAFF), South Africa, and the Limpopo Department of Agriculture and Rural Development (LDARD), as part of the ‘Revitalization of Smallholder Irrigation in South Africa’ project. About one-third of those schemes was fully utilized; one-third partially utilized; and one-third not utilized in the winter of 2015; however, no single socioeconomic, physical, agronomic and marketing variable could explain these differences in utilization. Sale, mostly for informal markets, appeared the most important goal. Dilapidated infrastructure was the most important constraint cited by the farmers. The study recommends ways to overcome the build-neglect-rebuild syndrome, and to learn lessons from informal irrigation, which covers an area three to four times as large as public irrigation schemes in the province.
Appraisal of Water Resources for Effective and Sustainable Management
Freshwater scarcity is caused by a long history of poor management of water resources. Typically, humans simultaneously use the same limited water resource for multiple purposes without considering the cumulative impact on this resource. This book elucidates the chemical health status of the Volta Lake ecosystem within the framework of changes in chemical parameters as potential indicators of pollution to ensure the appropriate management of the lake to satisfy the changing demand placed on the lake, safeguard the quality of life of its users, protect its ecosystem and preserve it for future generations. This book adopts an integrated approach to address the general chemical health status of the lake for ecosystem sustainability as well as its trophic state and primary productivity to significantly inform future research needs and approaches for effective and sustainable management.
Mapping irrigated areas in the Limpopo Province, South Africa
This report summarizes the findings of a collaborative effort to map and assess irrigated areas in the Limpopo Province, South Africa. The study was conducted by the International Water Management Institute (IWMI) in collaboration with the Department of Agriculture, Forestry and Fisheries (DAFF) and the Limpopo Department of Agriculture and Rural Development (LDARD), as part of the DAFF-supported ‘Revitalization of irrigation in South Africa’ project. Based on a combination of Landsat and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data, previous irrigated area mapping exercises carried out by DAFF and three-field ground truthing (GT) surveys, a total of 1.6 million hectares (Mha) of cropland were identified, with 262,000 ha actually irrigated in the 2015 winter season. The study also found that only 29% of all land equipped with center pivots was actually irrigated.
Adapting aquifer storage and recovery technology to the flood-prone areas of northern Ghana for dry-season irrigation
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Methods to investigate the hydrology of the Himalayan springs
Springs are the major source of freshwater in many small mountainous watersheds within the Himalayan region. In recent years, their flow rates have diminished, but the reasons for this are not self-evident, and hence this paper reviews the methods to investigate Himalayan springs. The review reveals that chemical and isotope analyses – mostly water dating and stable isotope (e.g., d18O) analyses – could be an appropriate entry point to commence field investigations, because of their potential to map complex spring pathways, including linkages between aquifers. This should be combined with the building of hydrogeological maps with the available data. Output from desktop analyses, field investigations and hydrogeological maps could then contribute to the establishment of a conceptual model, which could form the basis for a numerical model.
Dependence of riparian communities on ecosystem services in northern Ghana
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