Search Results - "MacDonald, Alan M."

Impact of irrigated agriculture on groundwater-recharge salinity: a major sustainability concern in semi-arid regions by Foster, Stephen, Pulido-Bosch, Antonio, Vallejos, Ángela, Molina, Luis, Llop, Armando, MacDonald, Alan M.

“…Intensive irrigated agriculture substantially modifies the hydrological cycle and often has major environmental impacts. The article focuses upon a specific…”
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Changes in global groundwater organic carbon driven by climate change and urbanization by McDonough, Liza K., Santos, Isaac R., Andersen, Martin S., O’Carroll, Denis M., Rutlidge, Helen, Meredith, Karina, Oudone, Phetdala, Bridgeman, John, Gooddy, Daren C., Sorensen, James P. R., Lapworth, Dan J., MacDonald, Alan M., Ward, Jade, Baker, Andy

“…Climate change and urbanization can increase pressures on groundwater resources, but little is known about how groundwater quality will change. Here, we use a…”
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Water supply and health by Hunter, Paul R, MacDonald, Alan M, Carter, Richard C

“…As one article in a four-part PLoS Medicine series on water and sanitation, Paul Hunter and colleagues argue that much more effort is needed to improve access…”
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Evidence of the dependence of groundwater resources on extreme rainfall in East Africa by Taylor, Richard G., Todd, Martin C., Kongola, Lister, Maurice, Louise, Nahozya, Emmanuel, Sanga, Hosea, MacDonald, Alan M.

“…Recharge sustains groundwater resources that are depended on globally for drinking water and irrigated agriculture. A newly compiled 55-year record of…”
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Linkages between GRACE water storage, hydrologic extremes, and climate teleconnections in major African aquifers by Scanlon, Bridget R, Rateb, Ashraf, Anyamba, Assaf, Kebede, Seifu, MacDonald, Alan M, Shamsudduha, Mohammad, Small, Jennifer, Sun, Alexander, Taylor, Richard G, Xie, Hua

“…Water resources management is a critical issue in Africa where many regions are subjected to sequential droughts and floods. The objective of our work was to…”
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Mapping groundwater recharge in Africa from ground observations and implications for water security by MacDonald, Alan M, Lark, R Murray, Taylor, Richard G, Abiye, Tamiru, Fallas, Helen C, Favreau, Guillaume, Goni, Ibrahim B, Kebede, Seifu, Scanlon, Bridget, Sorensen, James P R, Tijani, Moshood, Upton, Kirsty A, West, Charles

“…Groundwater forms the basis of water supplies across much of Africa and its development is rising as demand for secure water increases. Recharge rates are a…”
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Aquifer conditions, not irradiance determine the potential of photovoltaic energy for groundwater pumping across Africa by Meunier, Simon, Kitanidis, Peter K., Cordier, Amaury, MacDonald, Alan M.

“…Abstract Groundwater pumping using photovoltaic energy has the potential to transform water services in poorly served areas. Here we develop a numerical model…”
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Meltwater flow through a rapidly deglaciating glacier and foreland catchment system: Virkisjökull, SE Iceland by Flett, Verity, Maurice, Louise, Finlayson, Andrew, Black, Andrew R., MacDonald, Alan M., Everest, Jez, Kirkbride, Martin P.

“…Abstract Virkisjökull is a rapidly retreating glacier in south-east Iceland. A proglacial lake has formed in the last ten years underlain by buried ice. In…”
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A method for estimating maximum safe installable power for groundwater extraction with application to Africa by Zuffinetti, Guillaume, Meunier, Simon, MacAllister, Donald John, Kitanidis, Peter K., MacDonald, Alan M.

“…New groundwater development is a likely way to meet growing global water demand but needs careful management. To help inform the sustainable development of…”
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Ground truthing global-scale model estimates of groundwater recharge across Africa by West, Charles, Reinecke, Robert, Rosolem, Rafael, MacDonald, Alan M., Cuthbert, Mark O., Wagener, Thorsten

“…Groundwater is an essential resource for natural and human systems throughout the world and the rates at which aquifers are recharged constrain sustainable…”
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Investigating the Productivity and Sustainability of Weathered Basement Aquifers in Tropical Africa Using Numerical Simulation and Global Sensitivity Analysis by Bianchi, Marco, MacDonald, Alan M., Macdonald, David M. J., Asare, Enoch B.

“…Groundwater stored in weathered basement aquifers (WBAs) is a strategic water resource. In this study, we investigate the productivity of WBAs and…”
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Permeability of the weathered bedrock aquifers in Uganda: evidence from a large pumping-test dataset and its implications for rural water supply by Owor, Michael, Okullo, Joseph, Fallas, Helen, MacDonald, Alan M., Taylor, Richard, MacAllister, Donald John

“…Weathered crystalline-rock aquifers underlie around 40% of sub-Saharan Africa providing water supplies for half of its rural population; they are also…”
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Tryptophan-like fluorescence as a high-level screening tool for detecting microbial contamination in drinking water by Ward, Jade S.T., Lapworth, Daniel J., Read, Daniel S., Pedley, Steve, Banda, Sembeyawo T., Monjerezi, Maurice, Gwengweya, Gloria, MacDonald, Alan M.

“…Regular monitoring of drinking water quality is vital to identify contamination of potable water supplies. Testing for microbial contamination is important to…”
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Real-time detection of faecally contaminated drinking water with tryptophan-like fluorescence: defining threshold values by Sorensen, James P.R., Baker, Andy, Cumberland, Susan A., Lapworth, Dan J., MacDonald, Alan M., Pedley, Steve, Taylor, Richard G., Ward, Jade S.T.

“…We assess the use of fluorescent dissolved organic matter at excitation-emission wavelengths of 280nm and 360nm, termed tryptophan-like fluorescence (TLF), as…”
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In-situ fluorescence spectroscopy is a more rapid and resilient indicator of faecal contamination risk in drinking water than faecal indicator organisms by Sorensen, James P.R., Nayebare, Jacintha, Carr, Andrew F., Lyness, Robert, Campos, Luiza C., Ciric, Lena, Goodall, Timothy, Kulabako, Robinah, Curran, Catherine M. Rushworth, MacDonald, Alan M., Owor, Michael, Read, Daniel S., Taylor, Richard G.

“…•TLF/HLF more related to thermotolerant coliforms (TTCs) than other rapid approaches.•Relationships between TLF/HLF and TTCs are significant in the wet…”
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Large-scale survey of seasonal drinking water quality in Malawi using in situ tryptophan-like fluorescence and conventional water quality indicators by Ward, Jade S.T., Lapworth, Daniel J., Read, Daniel S., Pedley, Steve, Banda, Sembeyawo T., Monjerezi, Maurice, Gwengweya, Gloria, MacDonald, Alan M.

“…Faecally-contaminated drinking water is a risk to human health, with the greatest risks to those living in developing countries. UN Sustainable Development…”
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Assessing regional variation in yield from weathered basement aquifers in West Africa and modelling their future groundwater development and sustainability by Bianchi, Marco, Palamakumbura, Romesh N., MacDonald, Alan M., Macdonald, David M. J.

“…A data-driven modelling approach was applied to quantify the potential groundwater yield from weathered crystalline basement aquifers in West Africa, which are…”
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Presence of emerging organic contaminants and microbial indicators in surface water and groundwater in urban India by Brauns, Bentje, Chandra, Subhash, Civil, Wayne, Lapworth, Dan J., MacDonald, Alan M., McKenzie, Andrew A., Read, Daniel S., Sekhar, Muddu, Singer, Andrew C., Thankachan, Amritha, Tipper, Holly J.

“…This study presents a first combined assessment of emerging organic contaminants (EOC) and antimicrobial resistance (AMR) indicators in the South Indian city…”
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In-situ fluorescence spectroscopy indicates total bacterial abundance and dissolved organic carbon by Sorensen, James P.R., Diaw, Mor Talla, Pouye, Abdoulaye, Roffo, Raphaëlle, Diongue, Djim M.L., Faye, Seynabou C., Gaye, Cheikh B., Fox, Bethany G., Goodall, Timothy, Lapworth, Daniel J., MacDonald, Alan M., Read, Daniel S., Ciric, Lena, Taylor, Richard G.

“…We explore in-situ fluorescence spectroscopy as an instantaneous indicator of total bacterial abundance and faecal contamination in drinking water. Eighty-four…”
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Quantifying the dynamics of sub-daily to seasonal hydrological interactions of Ganges river with groundwater in a densely populated city: Implications to vulnerability of drinking water sources by Das, Prerona, Mukherjee, Abhijit, Lapworth, Dan J., Das, Kousik, Bhaumik, Sumitro, Layek, Mrinal K., Shaw, Ashok, Smith, Martin, Sengupta, Probal, MacDonald, Alan M., Sen, Joy

“…Groundwater resources in South Asian cities are facing immense stress due to over-extraction leading to environmental, social and economic instabilities. The…”
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