Your search found 6 records
1 Nestler, W.; Socher, M.; Grischek, T.; Schwan, M. 1991. River bank infiltration in Upper Elbe River Valley: Hydrochemical aspects. In Nachtnebel, H. P.; Kovar, K. Hydrological basis of ecologically sound management of soil and groundwater. Wallingford, UK: IAHS. pp.347-356.
(Location: IWMI-HQ Call no: 551.48 G000 NAC Record No: H029767)
2 Amerasinghe, Priyanie; Asolekar, S. R.; Essl, L.; Grischek, T.; Gupta, P. K.; Heinze, K; Jampani, Mahesh; Kimothi, C.; Kumar, D.; Lesch, M.; Sandhu, C.; Semwal, M.; Singh, P. D. K.; Starkl, M. 2014. Report on initial sustainability assessment. Saph Pani Deliverable 6.1. [Project report of the Enhancement of Natural Water Systems and Treatment Methods for Safe and Sustainable Water Supply in India (Saph Pani)] Vienna, Austria: Center for Environmental Management and Decision Support (CEMDS). 109p.
Sustainability ; Assessment ; Wastewater treatment ; Wetlands ; Environmental effects ; Health hazards ; Social aspects ; Corporate culture ; Economic aspects ; Ponds ; Case studies
(Location: IWMI HQ Call no: e-copy only Record No: H046763)
http://www.saphpani.eu/fileadmin/uploads/Administrator/Deliverables/Saph_Pani_D6.1_Rport_on_initial_sustainability_assessment.pdf
https://vlibrary.iwmi.org/pdf/H046763.pdf
https://vlibrary.iwmi.org/pdf/H046763.pdf
(3.70 MB) (3.69 MB)
3 Pholkern, K.; Srisuk, K.; Grischek, T.; Soares, M.; Schafer, S.; Archwichai, L.; Saraphirom, P.; Pavelic, Paul; Wirojanagud, W. 2015. Riverbed clogging experiments at potential river bank filtration sites along the Ping River, Chiang Mai, Thailand. Environmental Earth Sciences, 73:7699-7709. [doi: https://doi.org/10.1007/s12665-015-4160-x]
Riverbank protection ; Filtration ; Hydraulics ; Water quality ; Sedimentation ; Flow discharge / Thailand / Chiang Mai / Ping River
(Location: IWMI HQ Call no: e-copy only Record No: H047065)
(4.11 MB)
Riverbank filtration (RBF) is a process during which river water is subjected to subsurface flow prior to abstraction wells, often characterized by improved water quality. The induced infiltration of river water through the riverbed also creates a clogging layer. This decreases riverbed permeability and abstraction rates, particularly if the river water has high turbidity, as in Thailand. As Chiang Mai Province is one of the most favorable sites for future RBF construction in Thailand, two sites, Mae Rim and San Pa Tong, were selected to simulate clogging by using a channel experiment. The mobile experimental apparatus was set up at the bank of the river in order to use fresh river water. Riverbed sediment was used as channel bed and filling material for the columns. The aim was to simulate riverbed clogging using river water with high turbidity and determine the effect of clogging, which can be quantified using vertical hydraulic conductivity (Kv). An increase in channel flow velocity caused partial removal of a clogging layer in only the top 0.03 m of the sediment column. The combination of low channel flow and high turbidity leads to much more clogging than high channel flow and low turbidity. A complete manual removal of the external clogging layer led to an increase in Kv, but the initial Kv values were not recovered. The external clogging had a lower effect on Kv than internal clogging. For planning new RBF sites along high-turbidity rivers, reduction in Kv to estimate RBF well yield cannot be calculated based only on initial Kv but requires field experiments.
4 Kloppmann, W.; Sandhu, C.; Groeschke, M.; Pandian, R. S.; Picot-Colbeau, G.; Fahimuddin, M.; Ahmed, S.; Alazard, M.; Amerasinghe, Priyanie; Bhola, P.; Boisson, A.; Elango, L.; Feistel, U.; Fischer, S.; Ghosh, N. C.; Grischek, T.; Grutzmacher, G.; Hamann, E.; Nair, I. S.; Jampani, Mahesh; Mondal, N. C.; Monninkhoff, B.; Pettenati, M.; Rao, S.; Sarah, S.; Schneider, M.; Sklorz, S.; Thiery, D.; Zabel, A. 2015. Modelling of natural water treatment systems in India: Learning from the Saph Pani case studies. In Wintgens. T.; Nattorp, A.; Elango, L.; Asolekar, S. R. (Eds.). Natural water treatment systems for safe and sustainable water supply in the Indian context: Saph Pani, London, UK: IWA Publishing. pp. 227-250.
Wastewater treatment ; Wastewater irrigation ; Models ; Riverbank protection ; Filtration ; Wetlands ; Flow discharge ; Water quality ; Water reuse ; Aquifers ; Groundwater recharge ; Groundwater management ; Watershed management ; Surface water ; Coastal area ; Drinking water ; Salt water intrusion ; Geology ; Weathering ; Irrigation canals ; Case studies / India / New Delhi / Chennai / Tamil Nadu / Telangana / Hyderabad / Maheshwaram / Uttarakhand / Haridwar / Yamuna River / Ganga River / Musi River
(Location: IWMI HQ Call no: e-copy only Record No: H047553)
https://zenodo.org/record/61088/files/9781780408392_14.pdf
https://vlibrary.iwmi.org/pdf/H047553.pdf
https://vlibrary.iwmi.org/pdf/H047553.pdf
(12.42 MB) (3.9 MB)
5 Dillon, P.; Stuyfzand, P.; Grischek, T.; Lluria, M.; Pyne, R. D. G.; Jain, R. C.; Bear, J.; Schwarz, J.; Wang, W.; Fernandez, E.; Stefan, C.; Pettenati, M.; van der Gun, J.; Sprenger, C.; Massmann, G.; Scanlon, B. R.; Xanke, J; Jokela, P.; Zheng, Y.; Rossetto, R.; Shamrukh, M.; Pavelic, Paul; Murray, E.; Ross, A.; Bonilla Valverde, J. P.; Palma Nava, A.; Ansems, N.; Posavec, K.; Ha, K.; Martin, R.; Sapiano, M. 2019. Sixty years of global progress in managed aquifer recharge. Hydrogeology Journal, 27(1):1-30. [doi: https://doi.org/10.1007/s10040-018-1841-z]
Groundwater management ; Groundwater recharge ; Groundwater extraction ; Groundwater pollution ; Water use ; Water quality ; Water resources ; Water levels ; Water storage ; Water supply ; Aquifers ; Artificial recharge ; Filtration ; Drinking water
(Location: IWMI HQ Call no: e-copy only Record No: H048926)
https://link.springer.com/content/pdf/10.1007%2Fs10040-018-1841-z.pdf
https://vlibrary.iwmi.org/pdf/H048926.pdf
https://vlibrary.iwmi.org/pdf/H048926.pdf
(4.47 MB)
The last 60 years has seen unprecedented groundwater extraction and overdraft as well as development of new technologies for water treatment that together drive the advance in intentional groundwater replenishment known as managed aquifer recharge (MAR). This paper is the first known attempt to quantify the volume of MAR at global scale, and to illustrate the advancement of all the major types of MAR and relate these to research and regulatory advancements. Faced with changing climate and rising intensity of climate extremes, MAR is an increasingly important water management strategy, alongside demand management, to maintain, enhance and secure stressed groundwater systems and to protect and improve water quality. During this time, scientific research—on hydraulic design of facilities, tracer studies, managing clogging, recovery efficiency and water quality changes in aquifers—has underpinned practical improvements in MAR and has had broader benefits in hydrogeology. Recharge wells have greatly accelerated recharge, particularly in urban areas and for mine water management. In recent years, research into governance, operating practices, reliability, economics, risk assessment and public acceptance of MAR has been undertaken. Since the 1960s, implementation of MAR has accelerated at a rate of 5%/year, but is not keeping pace with increasing groundwater extraction. Currently, MAR has reached an estimated 10 km3/year, ~2.4% of groundwater extraction in countries reporting MAR (or ~1.0% of global groundwater extraction). MAR is likely to exceed 10% of global extraction, based on experience where MAR is more advanced, to sustain quantity, reliability and quality of water supplies.
6 Otter, P.; Sattler, W.; Grischek, T.; Jaskolski, M.; Mey, E.; Ulmer, N.; Grossmann, P.; Matthias, F.; Malakar, P.; Goldmaier, A.; Benz, F.; Ndumwa, C. 2020. Economic evaluation of water supply systems operated with solar-driven electro-chlorination in rural regions in Nepal, Egypt and Tanzania. Water Research, 187:116384. [doi: https://doi.org/10.1016/j.watres.2020.116384]
Water supply ; Economic evaluation ; Chlorination ; Drinking water ; Rural development ; Water treatment ; Technology ; Water quality ; Water demand ; Solar energy ; Water use ; Nongovernmental organizations ; Communities ; Infrastructure ; Stakeholders ; Monitoring / Egypt / United Republic of Tanzania / Nepal / Devgaun / El Heiz / Rombo
(Location: IWMI HQ Call no: e-copy only Record No: H050083)
(4.24 MB)
Reliable data on the economic feasibility of small-scale rural water supply systems are insufficient, which hampers the allocation of funds to construct them, even as the need for their construction increases. To address this gap, three newly constructed water supply systems with water points in Nepal, Egypt, and Tanzania were accompanied by the authors throughout the planning and implementation phases and up to several years of operation. This study presents an analysis of their economic feasibility and suggests important factors for successful water supply system implementation at other rural locations. The initial investment for construction of the new water supply systems ranged from 23,600 € to 44,000 €, and operation and maintenance costs ranged from 547 € to 1921 € per year. The water price and actual multi-year average quantity of tapped water at each site were 7.7 €/m³ & 0.67 m³/d in Nepal, 0.7 €/m³ & 0.88 m³/d in Egypt and 0.9 €/m³ & 8.65 m³/d in Tanzania. Although the new water supply systems enjoyed acceptance among the consumers, the actual average water quantity tapped ranged from just 17 to 30 % of the demand for which the new supply systems were designed. While two of three sites successfully yielded a cash surplus through the sale of water, sufficient for operation, maintenance and basic repairs, no site showed a realistic chance of recovering the initial investment (reaching the break-even point) within the projected lifetime of the technical infrastructure. Reaching the break-even point within 5 years, which would be necessary to attract private investors, would require an unrealistic increase of the water price or the water consumption by factors ranging from 5.2 to 9.0. The economic viability of such systems therefore depends strongly on the quantity of water consumed and the water price, as well as the availability of funding from governments, NGOs or other sponsors not primarily interested in a financial return on their investment.
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