Your search found 7 records
1 Hannah, D. M.; Kansakar, S. R.; Gerrard, A. J.; Rees, G. 2005. Flow regimes of Himalayan rivers of Nepal: Nature and spatial patterns. Journal of Hydrology, 308:18-32.
(Location: IWMI-HQ Call no: P 7323 Record No: H036863)
2 Hannah, D. M.; Kansakar, S. R.; Gerrard, J. 2005. Identifying potential hydrological impacts of climatic variability and change for Himalayan basins of Nepal. In Regional hydrological impacts of climatic change: Impact assessment and decision Making. Proceedings of Symposium S6 held during the 7th IAHS Scientific Assembly at Foz do lguaçu, Brazil, April 2005. IAHS Publ.295, 2005. pp.120-130.
(Location: IWMI-HQ Call no: P 7324 Record No: H036895)
3 Kansakar, S. R.; Hannah, D. M.; Gerrard, J.; Rees, G. 2004. Spatial patterns in the precipitation regime of Nepal. International Journal of Climatology, 24:1645-1659.
(Location: IWMI-HQ Call no: P 7325 Record No: H036896)
4 Hannah, D. M.; Kansakar, S R.; Gerrard, J.; Rees, G. 2004. Linking river flow and precipitation regimes for Himalayan basins of Nepal: Assessing hydroclimatological variability and implications of climate change. British Hydrological Society. Hydrology: Science & Practice for the 21st Century Vol.1, pp.36-45.
(Location: IWMI-HQ Call no: P 7326 Record No: H036897)
5 Nardi, F.; Cudennec, C.; Abrate, T.; Allouch, C.; Annis, A.; Assumpcao, T. H.; Aubert, A. H.; Berod, D.; Braccini, A. M.; Buytaert, W.; Dasgupta, A.; Hannah, D. M.; Mazzoleni, M.; Polo, M. J.; Saebo, O.; Seibert, J.; Tauro, F.; Teichert, F.; Teutonico, R.; Uhlenbrook, Stefan; Vargas, C. W.; Grimaldi, S. 2022. Citizens AND HYdrology (CANDHY): conceptualizing a transdisciplinary framework for citizen science addressing hydrological challenges. Hydrological Sciences Journal, 67(16):2534-2551. (Special issue: Hydrological Data: Opportunities and Barriers) [doi: https://doi.org/10.1080/02626667.2020.1849707]
Hydrology ; Citizen science ; Community involvement ; Human behaviour ; Water management ; Participatory approaches ; Decision making ; Policy making ; Regional planning ; Information systems ; Frameworks ; Observation ; Monitoring ; Mapping ; Procedures ; Guidelines ; Technology ; Data collection ; Models
(Location: IWMI HQ Call no: e-copy only Record No: H050058)
https://www.tandfonline.com/doi/epdf/10.1080/02626667.2020.1849707?needAccess=true&role=button
https://vlibrary.iwmi.org/pdf/H050058.pdf
https://vlibrary.iwmi.org/pdf/H050058.pdf
(2.09 MB) (2.09 MB)
Widely available digital technologies are empowering citizens who are increasingly well informed and involved in numerous water, climate, and environmental challenges. Citizen science can serve many different purposes, from the “pleasure of doing science” to complementing observations, increasing scientific literacy, and supporting collaborative behaviour to solve specific water management problems. Still, procedures on how to incorporate citizens’ knowledge effectively to inform policy and decision-making are lagging behind. Moreover, general conceptual frameworks are unavailable, preventing the widespread uptake of citizen science approaches for more participatory cross-sectorial water governance. In this work, we identify the shared constituents, interfaces and interlinkages between hydrological sciences and other academic and non-academic disciplines in addressing water issues. Our goal is to conceptualize a transdisciplinary framework for valuing citizen science and advancing the hydrological sciences. Joint efforts between hydrological, computer and social sciences are envisaged for integrating human sensing and behavioural mechanisms into the framework. Expanding opportunities of online communities complement the fundamental value of on-site surveying and indigenous knowledge. This work is promoted by the Citizens AND HYdrology (CANDHY) Working Group established by the International Association of Hydrological Sciences (IAHS).
6 Wendt, D. E.; Van Loon, A. F.; Bloomfield, J. P.; Hannah, D. M.. 2020. Asymmetric impact of groundwater use on groundwater droughts. Hydrology and Earth System Sciences, 24(10):4853-4868. [doi: https://doi.org/10.5194/hess-24-4853-2020]
Groundwater table ; Water use ; Drought ; Monitoring ; Water management ; Groundwater recharge ; Aquifers ; Water extraction ; Precipitation ; Evapotranspiration ; Wells ; Trends ; Case studies / United Kingdom / Lincolnshire / Chilterns / Midlands / Shropshire
(Location: IWMI HQ Call no: e-copy only Record No: H050094)
https://hess.copernicus.org/articles/24/4853/2020/hess-24-4853-2020.pdf
https://vlibrary.iwmi.org/pdf/H050094.pdf
https://vlibrary.iwmi.org/pdf/H050094.pdf
(3.28 MB) (3.28 MB)
Groundwater use affects groundwater storage continuously as the removal of water changes both short-term and long-term groundwater level variation. This has implications for groundwater droughts, i.e. a below-normal groundwater level. The impact of groundwater use on groundwater droughts, however, remains unknown. Hence, the aim of this study is to investigate the impact of groundwater use on groundwater droughts in the absence of actual abstraction data. We present a methodological framework that consists of two approaches. The first approach compared groundwater droughts at monitoring sites that are potentially influenced by abstraction to groundwater droughts at sites that are known to be near natural. Observed groundwater droughts were compared in terms of drought occurrence, duration, and magnitude. The second approach investigated long-term trends in groundwater levels in all monitoring wells. This framework was applied to a case study of the UK, using four regional water management units in which groundwater levels are monitored and abstractions are licensed. Results show two asymmetric responses in groundwater drought characteristics due to groundwater use. The first response is an increase in shorter drought events and is found in three water management units where long-term annual average groundwater abstractions are smaller than recharge. The second response, observed in one water management unit where groundwater abstractions temporarily exceeded recharge, is a lengthening and intensification of groundwater droughts. Analysis of long-term (1984–2014) trends in groundwater levels shows mixed but generally positive trends, while trends in precipitation and potential evapotranspiration are not significant. The overall rising groundwater levels are consistent with changes in water use regulations and with a general reduction in abstractions during the period of investigation. We summarised our results in a conceptual typology that illustrates the asymmetric impact of groundwater use on groundwater drought occurrence, duration, and magnitude. The long-term balance between groundwater abstraction and recharge plays an important role in this asymmetric impact, which highlights the relation between short-term and long-term sustainable groundwater use.
7 Wendt, D. E.; Bloomfield, J. P.; Van Loon, A. F.; Garcia, M.; Heudorfer, B.; Larsen, J.; Hannah, D. M.. 2021. Evaluating integrated water management strategies to inform hydrological drought mitigation. Natural Hazards and Earth System Sciences, 21(10):3113-3139. [doi: https://doi.org/10.5194/nhess-21-3113-2021, 2021]
Water management ; Integrated management ; Water resources ; Strategies ; Drought ; Hydrological factors ; Mitigation ; Water availability ; Water demand ; Water use ; Water supply ; Surface water ; Groundwater recharge ; Drinking water ; Precipitation ; Reservoirs ; Meteorological factors ; Policies ; Soil moisture ; Case studies ; Models / England
(Location: IWMI HQ Call no: e-copy only Record No: H050708)
https://nhess.copernicus.org/articles/21/3113/2021/nhess-21-3113-2021.pdf
https://vlibrary.iwmi.org/pdf/H050708.pdf
https://vlibrary.iwmi.org/pdf/H050708.pdf
(6.32 MB) (6.32 MB)
Managing water–human systems during water shortages or droughts is key to avoid the overexploitation of water resources and, in particular, groundwater. Groundwater is a crucial water resource during droughts as it sustains both environmental and anthropogenic water demand. Drought management is often guided by drought policies, to avoid crisis management, and actively introduced management strategies. However, the impact of drought management strategies on hydrological droughts is rarely assessed. In this study, we present a newly developed socio-hydrological model, simulating the relation between water availability and managed water use over 3 decades. Thereby, we aim to assess the impact of drought policies on both baseflow and groundwater droughts. We tested this model in an idealised virtual catchment based on climate data, water resource management practices and drought policies in England. The model includes surface water storage (reservoir), groundwater storage for a range of hydrogeological conditions and optional imported surface water or groundwater. These modelled water sources can all be used to satisfy anthropogenic and environmental water demand. We tested the following four aspects of drought management strategies: (1) increased water supply, (2) restricted water demand, (3) conjunctive water use and (4) maintained environmental flow requirements by restricting groundwater abstractions. These four strategies were evaluated in separate and combined scenarios. Results show mitigated droughts for both baseflow and groundwater droughts in scenarios applying conjunctive use, particularly in systems with small groundwater storage. In systems with large groundwater storage, maintaining environmental flows reduces hydrological droughts most. Scenarios increasing water supply or restricting water demand have an opposing effect on hydrological droughts, although these scenarios are in balance when combined at the same time. Most combined scenarios reduce the severity and occurrence of hydrological droughts, given an incremental dependency on imported water that satisfies up to a third of the total anthropogenic water demand. The necessity for importing water shows the considerable pressure on water resources, and the delicate balance of water–human systems during droughts calls for short-term and long-term sustainability targets within drought policies.
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