Your search found 29 records
1 Starkl, M.; Amerasinghe, Priyanie; Essl, L.; Jampani, Mahesh; Kumar, D.; Asolekar, S. R. 2012. Potential of natural technologies for decentralised wastewater management in India. Paper presented at the International Water Association (IWA) Conference on Decentralised Wastewater Management in Asia, Nagpur, India, 20-22 November 2012. 14p.
Wastewater treatment ; Technology ; Water management ; Water use ; Lemna ; Ponds ; Wetlands ; Environmental effects ; Social aspects ; Health hazards ; Case studies / India
(Location: IWMI HQ Call no: e-copy only Record No: H045469)
(0.11 MB)
High population growth, increasing urbanization and rapid economic development are exerting pressure on the already scarce water resources in India. Untreated wastewater from human settlements reaching natural waterways is very common contributing to environmental pollution, which directly affects the availability of fresh water for human consumption. Therefore, treatment and reuse of wastewater can play an important role in addressing some of the urban water challenges in India. Conventional treatment plants have many challenges, therefore, natural treatment systems are viewed as a cost-effective alternative, which are more suitable in the Indian context. For example, they are not reliant on electricity, easier to maintain, can be part of small decentralised systems and work well in tropical climates. This study presents a rapid sustainability assessment and a review of the potential of natural treatment systems in India. The preliminary results show that the natural treatment systems have a high potential for wastewater treatment. However, there are still gaps in knowledge related to aspects that hinder the sustainable functioning of these treatment systems.
2 Amerasinghe, Priyanie; Jampani, Mahesh; Drechsel, Pay. 2013. Cities as sources of irrigation water: an Indian scenario. IWMI-Tata Water Policy Research Highlight, 53 (rev. ed.). 8p.
Irrigation water ; Food production ; Water demand ; Water availability ; Population growth ; Land use ; Wastewater irrigation ; Irrigated farming / India
(Location: IWMI HQ Call no: IWMI Record No: H045641)
(353KB)
3 Starkl, M.; Amerasinghe, Priyanie; Essl, L.; Jampani, Mahesh; Kumar, D.; Asolekar, S. R. 2013. Potential of natural treatment technologies for wastewater management in India. Journal of Water, Sanitation and Hygiene for Development, 3(4):500-511. [doi: https://doi.org/10.2166/washdev.2013.016]
Wastewater management ; Wastewater treatment ; Water quality ; Wetlands ; Ponds ; Case studies ; Health hazards ; Environmental effects ; Economic aspects ; Social aspects ; Corporate culture ; Land use / India
(Location: IWMI HQ Call no: e-copy only Record No: H045938)
(0.28 MB)
High population growth, increasing urbanization and rapid economic development are exerting pressure on the already scarce water resources in India. Treatment and reuse of wastewater can play an important role in addressing some of the urban water challenges. Conventional treatment plants have many challenges, therefore, natural treatment systems (NTSs) are viewed as a cost-effective alternative, which are more suitable in the Indian context. This study builds on a desktop study of NTSs and presents a rapid sustainability assessment of 12 NTSs, highlighting the potential and viability of NTSs in India. The results show that the NTSs have a high potential for wastewater treatment. However, there are still gaps in knowledge related to aspects that hinder the sustainability of the systems. Risks associated with reuse of treated wastewater in agriculture, operational problems and social acceptance were perceived as frequent challenges. Self-sustaining financing methods and the use of by-products were viewed as added benefits.
4 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)
5 Amerasinghe, Priyanie; Bouzit, M.; Brunner, M.; Essl, L.; Jampani, Mahesh; Kimothi, C.; Lakshmanan, E.; Sidhu, J.; Page, D.; Sandhu, C.; Starkl, M. 2014. Report on case study assessment and feasibility studies. Saph Pani Deliverable 6. 2. [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) 194p.
Risk assessment ; Health hazards ; Environmental effects ; Economic aspects ; Legal aspects ; Stakeholders ; Wastewater treatment ; Aquifers ; Case studies
(Location: IWMI HQ Call no: e-copy only Record No: H046764)
https://zenodo.org/record/127160/files/Saph_Pani_D6.2_Report_on_case_study_assessments_and_feasibility_studies.pdf
https://vlibrary.iwmi.org/pdf/H046764.pdf
https://vlibrary.iwmi.org/pdf/H046764.pdf
(3.34 MB) (3.33 MB)
6 Starkl, M.; Brunner, N.; Amerasinghe, Priyanie; Jampani, Mahesh; Kumar, D.; Asolekar, S. R.; Sonkamble, S.; Ahmed, S.; Wajihuddin, M.; Pratyusha, A.; Sarah, S. 2015. Stakeholder views, financing and policy implications for reuse of wastewater for irrigation: a case from Hyderabad, India. Water, 7(1):300-328. [doi: https://doi.org/10.3390/w7010300]
Wastewater irrigation ; Irrigation water ; Wastewater treatment ; Water reuse ; Water pollution ; Stakeholders ; Financing ; Policy ; River basins ; Wetlands ; Farmers ; Vegetables ; Health hazards / India / Hyderabad / Telangana / Musi River
(Location: IWMI HQ Call no: e-copy only Record No: H046838)
(0.58 MB) (589 KB)
When flowing through Hyderabad, the capital of Telangana, India, the Musi River picks up (partially) treated and untreated sewage from the city. Downstream of the city, farmers use this water for the irrigation of rice and vegetables. Treatment of the river water before it is used for irrigation would address the resulting risks for health and the environment. To keep the costs and operational efforts low for the farmers, the use of constructed wetlands is viewed as a suitable option. Towards this end, the paper investigates the interests and perceptions of government stakeholders and farmers on the treatment of wastewater for irrigation and further explores the consumer willingness to pay a higher price for cleaner produced vegetables. Full cost recovery from farmers and consumers cannot be expected, if mass scale treatment of irrigation water is implemented. Instead, both consumers and farmers would expect that the government supports treatment of irrigation water. Most stakeholders associated with the government weigh health and environment so high, that these criteria outweigh cost concerns. They also support the banning of irrigation with polluted water. However, fining farmers for using untreated river water would penalize them for pollution caused by others. Therefore public funding of irrigation water treatment is recommended.
7 Ahmed, S.; Alazard, M.; Amerasinghe, Priyanie; Boisson, A.; Jampani, Mahesh; Pavelic, Paul; Sonkamble, S. 2014. Conceptual model of flow and transport for a hard rock aquifer-Musi River microwatershed case study. Saph Pani Deliverable 3.2. [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). 56p.
Water supply ; Water quality ; Water levels ; Watersheds ; Sustainability ; Aquifers ; Land use ; Land cover ; Surface water ; Geophysics ; Geology ; Rivers ; Discharges ; Pumping ; Groundwater ; Canal irrigation ; Pesticides ; Soils ; Rain ; Wastewater treatment ; Wastewater irrigation ; Monsoon climate ; Electrical conductivity ; Wells ; Case studies / India / Telangana / Musi River
(Location: IWMI HQ Call no: e-copy only Record No: H046936)
https://zenodo.org/record/127160/files/Saph_Pani_D3.2_Conceptual_model_of_flow_and_transport_for_a_hard_rock_aquifer_Musi_River_microwatershed.pdf
https://vlibrary.iwmi.org/pdf/H046936.pdf
https://vlibrary.iwmi.org/pdf/H046936.pdf
(12.4 MB)
8 Jampani, Mahesh; Amerasinghe, Priyanie; Pavelic, Paul. 2015. An integrated approach to assess the dynamics of a peri-urban watershed influenced by wastewater irrigation. Journal of Hydrology, 523:427-440. [doi: https://doi.org/10.1016/j.jhydrol.2015.02.001]
Suburban agriculture ; Watersheds ; Land use ; Hydrology ; Socioeconomic environment ; Farmers ; Wastewater irrigation ; Groundwater irrigation ; Water use ; Water quality ; Leaf vegetables ; Aquifers ; Nutrients ; Labour costs ; Irrigated land ; Canal irrigation ; Rice ; Health hazards / India / Hyderabad
(Location: IWMI HQ Call no: e-copy only Record No: H047066)
(3.38 MB)
In many urban and peri-urban areas of India, wastewater is under-recognized as a major water resource. Wastewater irrigated agriculture provides direct benefits for the livelihoods and food security of many smallholder farmers. A rapidly urbanizing peri-urban micro-watershed (270 ha) in Hyderabad was assessed over a 10-year period from 2000 to 2010 for changes in land use and associated farming practices, farmer perceptions, socio-economic evaluation, land-use suitability for agriculture and challenges in potential irrigated area development towards wastewater use. This integrated approach showed that the change in the total irrigated area was marginal over the decade, whereas the built-up area within the watershed boundaries doubled and there was a distinct shift in cropping patterns from paddy rice to paragrass and leafy vegetables. Local irrigation supplies were sourced mainly from canal supplies, which accounted for three-quarters of the water used and was largely derived from wastewater. The remainder was groundwater from shallow hard-rock aquifers. Farmer perception was that the high nutrient content of the wastewater was of value, although they were also interested to pay modest amounts for additional pre-treatment. The shift in land use towards paragrass and leafy vegetables was attributed to increased profitability due to the high urban demand. The unutilised scrubland within the watershed has the potential for irrigation development, but the major constraints appear to be unavailability of labour and high land values rather than water availability. The study provides evidence to support the view that the opportunistic use of wastewater and irrigation practices, in general, will continue even under highly evolving peri-urban conditions, to meet the livelihood needs of the poor driven by market demands, as urban sprawl expands into cultivable rural hinterlands. Policy support is needed for enhanced recognition of wastewater for agriculture, with flow-on benefits including improved public health and protection of ecosystem services.
9 Amerasinghe, Priyanie; Jampani, Mahesh; Sonkamble, S.; Wajihuddin, Md.; Boisson, A.; Fahimuddin, Md.; Ahmed, S. 2015. Characterization and performance assessment of natural treatment systems in a wastewater irrigated micro-watershed: Musi River case study. 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.177-190.
Wastewater irrigation ; Wastewater treatment ; Performance evaluation ; Watersheds ; Water levels ; Water quality ; Water budget ; Water balance ; Land use ; Aquifers ; Rain ; Canals ; Wetlands ; Pumping ; Flow discharge ; Agriculture / India / Telangana / Krishna River / Musi River
(Location: IWMI HQ Call no: e-copy only Record No: H047550)
https://zenodo.org/record/61088/files/9781780408392_11.pdf
https://vlibrary.iwmi.org/pdf/H047550.pdf
https://vlibrary.iwmi.org/pdf/H047550.pdf
(11.79 MB) (1.2 MB)
10 Amerasinghe, Priyanie; Sonkamble, S.; Jampani, Mahesh; Wajihuddin, Md.; Lakshmanan, E.; Starkl, M.; Sarah, S.; Fahimuddin, Md.; Ahmed, S. 2015. Developing integrated management plans for natural treatment systems in urbanised areas: case studies from Hyderabad and Chennai. 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. 251-264.
Integrated management ; Urban areas ; Waste water treatment plants ; Pollution prevention ; Sanitation ; Water supply ; Water quality ; Sewerage ; Waste management ; Drinking water treatment ; Lakes ; Urban wastes ; Wetlands ; Ponds ; Dams ; Stakeholders ; Contamination ; Case studies / India / Hyderabad / Chennai
(Location: IWMI HQ Call no: e-copy only Record No: H047551)
https://zenodo.org/record/61088/files/9781780408392_15.pdf
https://vlibrary.iwmi.org/pdf/H047551.pdf
https://vlibrary.iwmi.org/pdf/H047551.pdf
(1.9 MB)
11 Starkl, M.; Amerasinghe, Priyanie; Essl, L.; Jampani, Mahesh; Kumar, D.; Asolekar; S. R. 2015. Rapid assessment and SWOT analysis of non-technical aspects of natural wastewater treatment systems. 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. 283-300.
Wastewater treatment ; Wastewater irrigation ; Agriculture ; Environmental impact assessment ; Ponds ; Wetlands ; Health services ; Social aspects ; Corporate culture ; Economic aspects ; Rural communities ; Eichhornia ; Case studies / India / Uttar Predesh / Madhya Predesh / Punjab / Mathura / Bhopal / Ludhiana District / Bathinda District / Saidpur
(Location: IWMI HQ Call no: e-copy only Record No: H047552)
https://zenodo.org/record/61088/files/9781780408392_17.pdf
https://vlibrary.iwmi.org/pdf/H047552.pdf
https://vlibrary.iwmi.org/pdf/H047552.pdf
(7.58 MB) (5.6 MB)
12 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)
13 Jampani, Mahesh; Amerasinghe, Priyanie; Liedl, R.; Locher-Krause, K.; Hulsmann, S. 2020. Multi-functionality and land use dynamics in a peri-urban environment influenced by wastewater irrigation. Sustainable Cities and Society, 62:102305. [doi: https://doi.org/10.1016/j.scs.2020.102305]
Wastewater irrigation ; Peri-urban agriculture ; Land use change ; Modelling ; Groundwater irrigation ; Irrigation systems ; Watersheds ; Irrigated land ; Forecasting ; Satellite imagery ; Crops ; Rice ; Vegetables ; Brachiaria mutica / India / Hyderabad / Kachiwani Singaram Micro WaterShed
(Location: IWMI HQ Call no: e-copy only Record No: H049805)
(8.38 MB)
Peri-urban areas are characterized by multifunctional land-use patterns forming a mosaic of built-up and agricultural areas. They are critical for providing food and other agricultural products, livelihood opportunities and multiple ecosystem services, which makes them transformative where urban and rural spaces blend. We analyzed land use changes in a peri-urban micro-watershed in Southern India by using Google Earth data to understand the micro-level spatio-temporal dynamics. This study aims at understanding the peri-urban agriculture and landscape changes as related to the change in use of wastewater and groundwater for irrigation. The temporal dynamics of peri-urban system including the changes in built-up, paragrass, paddy rice and vegetable cultivation, groundwater and wastewater irrigated areas in the watershed were evaluated. The detected changes indicate that, as a consequence of urban pressures, agricultural landscapes are being converted into built-up areas and, at the same time, former barren land is converted to agricultural plots. The mapped land use data are used in landscape change modelling for predicting the peri-urban agricultural dynamics and the driving factors in the watershed. Combined with the mapping and modelling approaches for land use change analysis, our results form the basis for integrated resources management in the wastewater influenced peri-urban systems.
14 Hulsmann, S.; Jampani, Mahesh. 2021. The nexus approach as a tool for resources management in resilient cities and multifunctional land-use systems. In Hulsmann, S.; Jampani, Mahesh (Eds.). A nexus approach for sustainable development: integrated resources management in resilient cities and multifunctional land-use systems. Cham, Switzerland: Springer. pp.1-13. [doi: https://doi.org/10.1007/978-3-030-57530-4_1]
Resource management ; Sustainable Development Goals ; Nexus ; Towns ; Rural urban relations ; Land use ; Participatory approaches ; Economic aspects ; Incentives ; Water resources ; Environmental factors ; Monitoring
(Location: IWMI HQ Call no: e-copy only Record No: H050117)
(0.46 MB)
The Nexus Approach to environmental resources management is increasingly recognized as an important vehicle to achieve sustainability as spelled out in the Sustainable Development Goals (SDGs). In particular, it was argued that the Nexus Approach is key for the sustainable use of environmental resources under conditions of global change and provides a tool to deal with challenges of global change including climate change, urbanization and population growth. Building on conceptual considerations with regard to monitoring and implementation outlined earlier, here, we explore how the Nexus Approach may provide solutions for managing resources in multifunctional land-use systems and resilient cities. In fact, the resources perspective is essential for holistic management of water, soil and waste along the urban–rural axis. Peri-urban areas provide perfect examples of multifunctional systems with manyfold opportunities to closing cycles, improve resource efficiency and mitigate trade-offs. Cases described in this book provide both positive as well as negative examples of what can be achieved by applying nexus thinking and what goes wrong if you don’t. Key messages emerging include: (i) participatory approaches are a central element for successful implementation of a nexus approach, (ii) effective mechanisms of knowledge transfer are a prerequisite of adoption and upscaling of nexus approaches and (iii) the lack of economic incentives and lack of data represent major challenges for the implementation of a nexus approach. Overall, the importance of a nexus mindset of all stakeholders involved in nexus cases and of providing an enabling environment by nexus-oriented governance, including appropriate economic instruments, was confirmed.
15 Jampani, Mahesh; Chandy, S. J. 2021. Increased antimicrobial use during COVID-19: the risk of advancing the threat of antimicrobial resistance. Health Science Reports, 4(4):e459. [doi: https://doi.org/10.1002/hsr2.459]
(Location: IWMI HQ Call no: e-copy only Record No: H050846)
(0.44 MB) (452 KB)
16 Jampani, Mahesh; Gothwal, Ritu; Mateo-Sagasta, Javier; Langan, Simon. 2022. Water quality modelling framework for evaluating antibiotic resistance in aquatic environments. Journal of Hazardous Materials Letters, 3:100056. [doi: https://doi.org/10.1016/j.hazl.2022.100056]
Water quality ; Modelling ; Frameworks ; Antibiotic resistance ; Aquatic environment ; Bacteria ; Risk assessment ; Watersheds
(Location: IWMI HQ Call no: e-copy only Record No: H051164)
https://www.sciencedirect.com/science/article/pii/S2666911022000090/pdfft?md5=e212c2526459913c8690a64f3856fb06&pid=1-s2.0-S2666911022000090-main.pdf
https://vlibrary.iwmi.org/pdf/H051164.pdf
https://vlibrary.iwmi.org/pdf/H051164.pdf
(3.75 MB) (3.75 MB)
In recent decades, antibiotic resistance (AR) has become a public health concern fuelled by increasing antibiotic consumption in many societies. Aquatic environments play a crucial role in AR development and spread where they receive antibiotics, antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) from a number of sources such as agriculture, aquaculture and wastewater treatment plants. Modelling is an increasingly important approach to understanding AR in aquatic environments and helps identify resistance patterns of emerging concern, evaluate fate and transport, and assess infection risks as well as look into their management in the future. However, current water quality models need to be improved to deal with the development and spread of AR. Prioritising the development of fate and transport models for AR could provide insights into bacterial evolution and help manage environmental pollution. This article provides a conceptual water quality modelling framework through a concise review of methods and approaches that can be used to model and evaluate AR in aquatic environments at the watershed scale. The key steps that need to build a framework include identifying sources and loadings, modelling the fate and transport of ARB and quantifying associated risks to humans and animals. Developing modelling scenarios and management strategies based on the framework could also contribute to achieving Sustainable Development Goals 3 (good health and well-being) and 6 (clean water and sanitation).
17 Sahya, A.; Sonkamble, S.; Jampani, Mahesh; Rao, A. N.; Amerasinghe, Priyanie. 2023. Field site soil aquifer treatment shows enhanced wastewater quality: evidence from vadose zone hydro-geophysical observations. Journal of Environmental Management, 345:118749. [doi: https://doi.org/10.1016/j.jenvman.2023.118749]
Wastewater treatment ; Nature-based solutions ; Water quality ; Parameters ; Experimentation ; Soil moisture ; Aquifers ; Groundwater ; Wastewater irrigation ; Periurban areas ; River basins ; Hydrogeology ; Pollutants / India / Hyderabad / Musi River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H052159)
(14.20 MB)
Soil aquifer treatment (SAT) is an emerging, nature-based, economically viable wastewater treatment solution. Currently, most SAT experiments are done at the laboratory scale, which cannot generate the same conditions as natural field sites and limits the understanding of treatment efficiency. The current study carried out in situ SAT experiments in the Musi River basin in India, where wastewater irrigation is a common practice. SAT efficiency was determined using an integrated approach, including electrical resistivity tomography (ERT) surveys, soil investigations (grain size, permeability, and moisture measurements), and biochemical characterization of raw and SAT treated wastewater. The ERT scans of SAT column show lower order electrical resistivity 10-30 O-m with enhanced chargeability >5–6 mV/V attributed to the vadose zone, characterized by clay-rich soil and sandy soil up to 5–6 m depth. The increase in sand percentage (>70%) below 140–160 cm depth corroborates with the high moisture content (23.5%). The vadose zone permeability (K) 1.58 m/day and discharge (Q) 38.19 m3/day is used to determine the pollutants reduction efficiency of SAT column. Hydrogeological and biogeochemical observations reveal that the improved dissolved oxygen from <1.0 to 5–6 mg/L in the vadose zone catalyzes the oxidation of organic matter resulting in the reduction of BOD and COD up to 92% and 97%, respectively, and denitrification reducing NO3-- (0.55 kg/day). In addition, the precipitation and adsorption by kaolinite clay prompted the reduction of PO42- (0.26 kg/day). Furthermore, the oxic-vadose zone could not support the growth of coliforms and faecal coliforms, and the reduction observed was up to 99.99% in the SAT production well. Overall, the results indicated a positive outcome with SAT efficiency and framed the SAT sitting criteria for different geological environments.
18 Jampani, Mahesh; Mateo-Sagasta, Javier; Chandrasekar, A.; Fatta-Kassinos, D.; Graham, D. W.; Gothwal, Ritu; Moodley, A.; Chadag, V. M.; Wiberg, David; Langan, Simon. 2024. Fate and transport modelling for evaluating antibiotic resistance in aquatic environments: current knowledge and research priorities. Journal of Hazardous Materials, 461:132527. [doi: https://doi.org/10.1016/j.jhazmat.2023.132527]
Antibiotic resistance ; Aquatic environment ; Gene transfer ; Water quality ; Modelling ; Environmental factors ; Health hazards ; Sediment ; Groundwater ; Wastewater treatment plants ; Microbial communities ; Bacteria ; Risk assessment ; Climate change
(Location: IWMI HQ Call no: e-copy only Record No: H052253)
https://www.sciencedirect.com/science/article/pii/S0304389423018101/pdfft?md5=6e8e888c620eebe6a5b9d2696e368c04&pid=1-s2.0-S0304389423018101-main.pdf
https://vlibrary.iwmi.org/pdf/H052253.pdf
https://vlibrary.iwmi.org/pdf/H052253.pdf
(7.70 MB) (7.70 MB)
Antibiotics have revolutionised medicine in the last century and enabled the prevention of bacterial infections that were previously deemed untreatable. However, in parallel, bacteria have increasingly developed resistance to antibiotics through various mechanisms. When resistant bacteria find their way into terrestrial and aquatic environments, animal and human exposures increase, e.g., via polluted soil, food, and water, and health risks multiply. Understanding the fate and transport of antibiotic resistant bacteria (ARB) and the transfer mechanisms of antibiotic resistance genes (ARGs) in aquatic environments is critical for evaluating and mitigating the risks of resistant-induced infections. The conceptual understanding of sources and pathways of antibiotics, ARB, and ARGs from society to the water environments is essential for setting the scene and developing an appropriate framework for modelling. Various factors and processes associated with hydrology, ecology, and climate change can significantly affect the fate and transport of ARB and ARGs in natural environments. This article reviews current knowledge, research gaps, and priorities for developing water quality models to assess the fate and transport of ARB and ARGs. The paper also provides inputs on future research needs, especially the need for new predictive models to guide risk assessment on AR transmission and spread in aquatic environments.
19 Jampani, Mahesh; Mateo-Sagasta, Javier; Langan, Simon. 2023. Antibiotic resistance in aquatic environments: priorities and knowledge for water quality modelling [Abstract only]. Paper presented at the 3rd UNESCO-International Water Resources Association (IWRA) Online Conference on Emerging Pollutants: Protecting Water Quality for the Health of People and the Environment, Online, 17-19 January 2023. 3p.
Resistance to antibiotics ; Antibiotic resistance genes ; Bacteria ; Water quality ; Modelling ; Frameworks ; Aquatic environment ; Public health ; Health hazards
(Location: IWMI HQ Call no: e-copy only Record No: H052351)
(0.33 MB)
20 Jampani, Mahesh; Matheswaran, Karthikeyan. 2023. Hydrological characterization and social dynamics of polders in the Bengal Delta [Abstract only]. Paper presented at the American Geophysical Union Annual Meeting 2023 (AGU23), San Francisco, CA, USA and Online, 11-15 December 2023. 2p.
Floodplains ; Reclaimed land ; Livelihoods ; Agricultural production ; Sedimentation ; Geomorphology ; Waterlogging ; Water availability / Bangladesh / Bengal Delta / Ganges-Brahmaputra Delta
(Location: IWMI HQ Call no: e-copy only Record No: H052357)
https://agu.confex.com/agu/fm23/meetingapp.cgi/Paper/1450505
https://vlibrary.iwmi.org/pdf/H052357.pdf
https://vlibrary.iwmi.org/pdf/H052357.pdf
(0.44 MB)
Polders in the floodplains of the Ganges-Brahmaputra delta in Bangladesh play a critical role in supporting intensive agricultural production and the livelihoods of around eight million people. Polderization is promoted to reduce environmental vulnerabilities against flood inundation, coastal erosion, and salinity intrusion. These land areas are low-lying islands consisting mainly of alluvial sediment deposits, and almost half (~1.2 million ha) of the coastal zone in the region is polderized. Agriculture is the primary reason for the polderization of the region, where paddy rice is the major irrigated crop. Around 139 polders in Bangladesh spread across the Gangetic-Brahmaputra delta region, and they altered the delicate balance between human activity and the floodplains' natural hydrological process, resulting in numerous evolving problems. These include the geomorphological evolution of the river channels and flood plains, water logging and drainage congestion within the polder system, sea-level rise, tidal surges, and salinity intrusion. Coastal and inland salinity is a significant problem in these polders, often influencing crop yields and further agricultural productivity and freshwater availability. We explicitly look at two polders to evaluate the distinct socio-hydrological characteristics of these systems. We used several secondary data sources and literature (grey and scientific) to evaluate the hydrological characteristics, groundwater heterogeneity and social dynamics to understand and evaluate the underlying mechanisms and intrinsic links between systems that influence water balance, saline water intrusion, and crop production. The initial results highlight the complex dynamics of the polder system, often influenced by water availability, irrigated water use, seasonality, and, above all, stakeholders' perceptions. Overall, this work provides an improved understanding of the biophysical dynamics and social linkages and sets the basis for implementing a larger detailed socio-hydrological framework.
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