Your search found 6 records
1 Palis, F. G.; Singleton, G. R.; Casimero, M. C.; Hardy, B. (Eds.) 2010. Research to impact: case studies for natural resource management for irrigated rice in Asia. Manila, Philippines: International Rice Research Institute (IRRI). 370p.
Natural resources management ; Water management ; Case studies ; Irrigated rice ; Drying ; Research ; Crop management ; Technology ; Community management ; Irrigation systems ; Nutrient management ; Communication ; Innovation ; Hunger ; Yields ; Stakeholders ; Agricultural extension ; Economic aspects ; Income / Asia / Indonesia / Philippines / Vietnam / China / Myanmar / Sri Lanka / Indo-Gangetic Plains / Mekong River Delta / Red River Delta / North Anhui
(Location: IWMI HQ Call no: 633.18 G570 PAL Record No: H043799)
http://books.irri.org/9789712202599_content.pdf
https://vlibrary.iwmi.org/pdf/H043799.pdf
http://vlibrary.iwmi.org/pdf/H043799_TOC.pdf
https://vlibrary.iwmi.org/pdf/H043799.pdf
http://vlibrary.iwmi.org/pdf/H043799_TOC.pdf
(10.04 MB) (10.0MB)
2 Lacombe, Guillaume; McCartney, Matthew; Forkuor, Gerald. 2012. Drying climate in Ghana over the period 1960–2005: evidence from the resampling-based Mann-Kendall test at local and regional levels. Hydrological Sciences Journal, 57(8):1594-1609. [doi: https://doi.org/10.1080/02626667.2012.728291]
Climate change ; Drying ; Rainfall patterns ; Water management ; Water storage ; Agriculture / Ghana
(Location: IWMI HQ Call no: e-copy only Record No: H045155)
(1.58 MB)
Trends in rainfall series were investigated at 16 stations in Ghana over the period 1960–2005. Time series were first de-correlated using an effective pre-whitening methodology and then submitted to the resamplingbased Mann-Kendall test. Field significances were assessed using the regional average Kendall statistic. Although no significant changes were observed in annual rainfall, the analysis reveals: (a) a reduction in the number of wet season days totalling less than 20 mm of rainfall, between latitudes 6 and 9.5 N; (b) a delay (about 0.5 d year-1) in the wet season onset at several locations throughout the country; and (c) a lengthening (about 0.1 d year-1) of rainless periods during the wet season in the south and centre of Ghana. All these changes, which remained insignificant at more than half of the individual stations, were found to be regionally significant at the 95% confidence level. The results highlight the importance of evaluating regional significance when investigating climate trends.
3 Schwarzenbeck, N.; Bomball, E.; Pfeiffer, W. 2008. Can a wastewater treatment plant be a powerplant?: a case study. Water Science and Technology, 57(10):1555-1561. [doi: https://doi.org/10.2166/wst.2008.215]
Wastewater treatment ; Sewage sludge ; Anaerobic treatment ; Energy generation ; Electrical energy ; Drying ; Residues ; Organic matter ; Costs
(Location: IWMI HQ Call no: e-copy only Record No: H046105)
(0.43 MB)
Today wastewater treatment plants are evaluated not only in terms of their treatment efficiency but also concerning their energy efficiency. Increasing energy efficiency can be realized either through operational optimisation or by realising an already existing potential for energy generation on-site. The main source of energy at a municipal wastewater treatment plant is the biogas produced in the anaerobic sludge digester. Studies indicate excess digester capacities of about 20% in Germany available for co-fermentation of organic substrates other than sewage sludge. This paper presents an example of a municipal wastewater treatment plant going towards an energy self-sufficient operation and even a surplus energy production as the result of an increasing co-fermentation of sludge from grease skimming tanks. In 2005 on average 113% of the electricity consumed for plant operation was generated on-site in gas engines. Co-fermentation of about 30% (related to the total dry residue input) of grease interceptor sludge in the presented case does not only effect a 4-times increased gas yield, but also an intensified 20% higher anaerobic degradation of the organic matter of the sewage sludge and thus having a positive influence not only on the energy and financial balance but also on the anaerobic sludge stabilisation with respect to the degradation degree of the organic fraction.
4 Global Water Intelligence (GWI). 2012. Sludge management: opportunities in growing volumes, disposal restrictions and energy recovery. Oxford, UK: Media Analytics Ltd. 296p.
Waste management ; Sludge treatment ; Waste disposal ; Resource recovery ; Energy recovery ; Industrial wastes ; Urban wastes ; Regulations ; Frameworks ; European Union ; Waste water treatment plants ; Technology ; Strategies ; Dewatering ; Anaerobic digestion ; Drying ; Thermal energy ; Pollutants ; Chemical reactions ; Biogas ; Nutrients ; Landfills ; Agricultural sector ; Market access ; Market research ; Market segmentation ; Costs ; Public opinion ; Case studies / North America / Europe / Middle East / North Africa / USA / Canada / China / Brazil / Japan
(Location: IWMI HQ Call no: 628.364 G000 GLO, e-copy SF Record No: H048869)
(1.08 MB)
5 Gurung, A.; Adhikari, S.; Chauhan, R.; Thakuri, S.; Nakarmi, S.; Ghale, S.; Dongol, B. S.; Rijal, D. 2019. Water crises in a water-rich country: case studies from rural watersheds of Nepal’s mid-hills. Water Policy, 21(4):826-847. [doi: https://doi.org/10.2166/wp.2019.245]
Water scarcity ; Water resources ; Water availability ; Watersheds ; River basins ; Water supply ; Water use ; Drinking water ; Water quality ; Climate change ; Drying ; Groundwater ; Water springs ; Rural areas ; Households ; Mountains ; Glaciers ; Case studies / Nepal / Kathmandu / Himalayas
(Location: IWMI HQ Call no: e-copy only Record No: H049279)
https://iwaponline.com/wp/article-pdf/21/4/826/585697/021040826.pdf
https://vlibrary.iwmi.org/pdf/H049279.pdf
https://vlibrary.iwmi.org/pdf/H049279.pdf
(0.90 MB) (916 KB)
The main objective of this paper is to assess the water crisis in Nepal by conducting a series of case studies in rural watersheds in the mid-hills. This was achieved through the applied qualitative method, especially combinations of desk study/structured searches, consultation, and field observation. The ground survey revealed that most of the rural communities in the mid-hills have an unreliable water supply. According to the local stakeholders, 20–25% of water resources have dried up as compared to 20 years ago. Drying up of water resources disproportionately affects women and girls in rural areas as women are responsible for household chores, including fetching drinking water. The findings also revealed that low-income households bear a disproportionate coping burden as compared to elite groups, as they often engage in coping strategies such as collecting water from distant water sources, which is labor- and time-intensive, and also yields smaller quantities of water. Assuming that unreliable water supplies will continue to exist in rural areas of the mid-hills for the foreseeable future, there is a critical need to consider which, if any, coping strategies will be most effective in ensuring that poor households will have access to safe and sufficient water supply
6 Siabi, Ebenezer K.; Akpoti, Komlavi; Zwart, Sander J. 2023. Small reservoirs in the northern regions of Ghana and their vulnerability to drying. Colombo, Sri Lanka: International Water Management Institute (IWMI). CGIAR Initiative on Aquatic Foods. 37p.
(Location: IWMI HQ Call no: e-copy only Record No: H052651)
(3.60 MB)
This study investigates the dynamics and susceptibility to drying of small reservoirs in Northern Ghana, leveraging advanced machine learning and remote sensing techniques through Google Earth Engine. It aims to map these reservoirs, evaluate their extent, and analyze water availability during dry seasons, crucial for understanding water resource potential for aquaculture and supporting food security goals under the CGIAR Initiative on Aquatic Foods. Findings reveal a consistent decrease in the number and size of reservoirs from November to April, attributed to increasing dry conditions, with a notable rise in reservoir numbers peaking in November 2022. Small reservoirs (< 0.6 hectares) were found to be more numerous than medium and large ones, predominantly located in midstream areas. Approximately half of these reservoirs face a very high risk of drying, highlighting the urgent need for effective water management strategies. This research provides significant insights into the vulnerabilities of small reservoirs, guiding sustainable management practices to combat the impacts of climate change and environmental stressors on water and aquaculture resources in Northern Ghana.
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