caa a22 4500 445815078 CHVBK 20180317145224.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10040-011-0723-4 doi (NATIONALLICENCE)springer-10.1007/s10040-011-0723-4 The impact of intensive groundwater abstraction on recharge to a shallow regional aquifer system: evidence from Bangladesh [Elektronische Daten] [Mohammad Shamsudduha, Richard Taylor, Kazi Ahmed, Anwar Zahid] Impact de l'exploitation intensive des eaux souterraines sur la réalimentation d'un aquifère peu profond d'extension régionale un exemple au Bangladesh Quantitative evaluations of the impact of groundwater abstraction on recharge are rare. Over a period (1975-2007) during which groundwater abstraction increased dramatically in the Bengal Basin, changes in net groundwater recharge in Bangladesh are assessed using the water-table fluctuation method. Mean annual groundwater recharge is shown to be higher (300-600mm) in northwestern and southwestern areas of Bangladesh than in southeastern and northeastern regions (<100mm) where rainfall and potential recharge are greater. Net recharge in many parts of Bangladesh has increased substantially (5-15mm/year between 1985 and 2007) in response to increased groundwater abstraction for irrigation and urban water supplies. In contrast, net recharge has slightly decreased (−0.5 to −1mm/year) in areas where groundwater-fed irrigation is low (<30% of total irrigation) and where abstraction has either decreased or remained unchanged over the period of 1985-2007. The spatio-temporal dynamics of recharge in Bangladesh illustrate the fundamental flaw in definitions of "safe yield” based on recharge estimated under static (non-pumping) conditions and reveal the areas where (1) further groundwater abstraction may increase actual recharge to the shallow aquifer, and (2) current groundwater abstraction for irrigation and urban water supplies is unsustainable. Springer-Verlag, 2011 Groundwater recharge/water budget nationallicence Groundwater monitoring nationallicence Agriculture nationallicence Over-abstraction nationallicence Bangladesh nationallicence Shamsudduha Mohammad Department of Geography, University College London, Gower Street, WC1E 6BT, London, UK aut Taylor Richard Department of Geography, University College London, Gower Street, WC1E 6BT, London, UK aut Ahmed Kazi Department of Geology, University of Dhaka, Curzon Hall Campus, 1000, Dhaka, Bangladesh aut Zahid Anwar Bangladesh Water Development Board, 72 Green Road, 1205, Dhaka, Bangladesh aut Hydrogeology Journal Springer-Verlag 19/4(2011-06-01), 901-916 1431-2174 19:4<901 2011 19 10040 https://doi.org/10.1007/s10040-011-0723-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-011-0723-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shamsudduha Mohammad Department of Geography, University College London, Gower Street, WC1E 6BT, London, UK aut NATIONALLICENCE 700 1- Taylor Richard Department of Geography, University College London, Gower Street, WC1E 6BT, London, UK aut NATIONALLICENCE 700 1- Ahmed Kazi Department of Geology, University of Dhaka, Curzon Hall Campus, 1000, Dhaka, Bangladesh aut NATIONALLICENCE 700 1- Zahid Anwar Bangladesh Water Development Board, 72 Green Road, 1205, Dhaka, Bangladesh aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/4(2011-06-01), 901-916 1431-2174 19:4<901 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer