Arsenic & River-Aquifer Interactions in the Bengal Basin

Arsenic in the Bengal Basin:

Naturally-occurring arsenic in groundwater has the potential to affect the health of more than 80 million people in Bangladesh and India. We are using numerical models to better understand how groundwater flows and arsenic is transported in this very large, highly heterogeneous aquifer system. The goal is to understand how to manage the system to avoid arsenic exposure by ensuring that wells pump only low-arsenic water. Currently deep groundwater is widely low in arsenic, so we are evaluating the potential of deep groundwater as a drinking water resource over the coming decades and centuries.

This figure shows model results for three different management scenarios (Split: shallow irrigation and deep domestic pumping, and Deep: all pumping deep) and two conditions of aquifer sorption. Colors represent areas of the deep aquifer contaminated with arsenic after 1000 years of simulation. See Radloff et al., 2011, Nature Geoscience.

L21_1000y_angleview_pathlines_poster.jpg

PUBLICATIONS:

Khan, MR, CI Voss, W Yu, and HA Michael (2014) Water resources management in the Ganges Basin: A comparison of three strategies for conjunctive use of groundwater and surface water, Water Resources Management, doi: 10.1007/s11269-014-0537-y.

Michael, HA (2013) An arsenic forecast for China, Science, 341, 852-853, doi: 10.1126/science.1242212.

Sahu, P, HA Michael, CI Voss, and PK Sikdar (2013) Impacts on groundwater recharge areas of megacity pumping: Analysis of potential contamination of Kolkata, India, water supply, Hydrological Sciences, doi: 10.1080/02626667.2013.813946.

Radloff, KA, Y Zheng, HA Michael, M Stute, BC Bostick, I Mihajlov, M Bounds, MR Huq, I Choudhury, MW Rahman, P Schlosser, KM Ahmed, A van Geen (2011) Arsenic migration to deep groundwater in Bangladesh influenced by adsorption and water demand, Nature Geoscience, doi: 10.1038/NGEO1283.

Fendorf, SF, HA Michael, and A van Geen (2010) Factors controlling the spatial and temporal variations of arsenic in groundwater of South and Southeast Asia, Science, 328 (5982), 1123-1127.

Burgess WG, MA Hoque, HA Michael, CI Voss, GN Breit, KM Ahmed (2010) Vulnerability of deep groundwater in the Bengal Aquifer System to contamination by arsenic, Nature Geoscience, doi: 10.1038/ngeo750.

Michael, HA and CI Voss (2009) Controls on groundwater flow in the Bengal Basin of India and Bangladesh: regional modeling analysis, Hydrogeology Journal, doi:10.1007/s10040-008-0429-4.

Michael, HA and CI Voss (2009) Estimation of regional-scale groundwater flow properties in the Bengal Basin of India and Bangladesh, Hydrogeology Journal, doi:10.1007/s10040-009-0443-1.

Michael, HA and CI Voss (2008) Evaluation of the sustainability of deep groundwater as an arsenic-safe resource in the Bengal Basin, Proceedings of the National Academy of Sciences, 105 (25) 8531-8536.

Harvey, CF, AN Khandaker, W Yu, ABM Badruzzaman, MA Ali, PM Oates, HA Michael, RB Neumann, R Beckie, S Islam, MF Ahmed (2006) Groundwater dynamics and arsenic contamination in Bangladesh, Chemical Geology, 228 112-136.

ABSTRACTS:

Khan, Md MR*, HA Michael, CI Voss, Water resources management in the Ganges Basin: A comparison of three strategies for conjunctive use of groundwater and surface water, Geological Society of America Annual Meeting, Charlotte, NC, November 4-7, 2012.

Michael, HA*, Impacts of small-scale geologic heterogeneity on large-scale groundwater flow: Implications for sustainable arsenic-safe water supply in the Bengal Basin, The Geological Society of London, Water Futures Conference, London, England, March 6-7, 2012, invited.

Michael, HA*, Transport of Solutes through Hydraulically and Chemically Heterogeneous Sediments of the Bengal Basin, Goldschmidt Conference, Prague, Czech Republic, August 14-19, 2011, Keynote.

Michael, HA*, CI Voss, KA Radloff, and Y Zheng, Multi-scale modeling of physical and chemical effects on arsenic transport to deep wells in the Bengal Basin, Conference on Arsenic in Groundwater in Southern Asia, Hanoi, Vietnam, November 14-17, 2011.

Michael, HA*, CI Voss, KA Radloff, and Y Zheng, Assessment of the physical and chemical sustainability of deep, low-arsenic groundwater in the Bengal Basin: Regional- and local-scale considerations, American Geophysical Union Fall Meeting, San Francisco, CA, December 13-17, 2010, invited.

Voss, CI*, HA Michael, and P Aggarwal, Simply-structured groundwater model analysis for informing management of Transboundary aquifers: Examples from Bengal Aquifer System (Bangladesh, India) and Nubian Sandstone Aquifer System (Chad, Egypt, Libya, Sudan), International Conference “Transboundary Aquifers: Challenges and New Directions” (ISARM 2010), December 6-8, 2010.

Michael, HA*, CI Voss, KA Radloff, and Y Zheng, Evaluation of water supply sustainability in the Bengal Basin through regional modeling of flow patterns and arsenic sorption, Geological Society of America Annual Meeting, Denver, CO, October 31 - November 3, 2010, invited.

Michael HA*, CI Voss, KA Radloff, and Y Zheng, Regional modeling of groundwater flow and arsenic transport in the Bengal Basin: Effects of sorption on safe groundwater use, Goldschmidt Conference on Earth, Energy, and the Environment, June 13-18, 2010, Knoxville, TN.

Radloff, KA*, Y Zheng, HA Michael, M Stute, I Mihajlov, and KM Ahmed, Evaluating arsenic adsorption in a low arsenic aquifer in Bangladesh using in situ and laboratory methods, Goldschmidt Conference on Earth, Energy, and the Environment, June 13-18, 2010, Knoxville, TN.

Michael, HA* and CI Voss, Regional modeling of groundwater flow and arsenic transport in the Bengal Basin: challenges of scale and complexity, American Geophysical Union Fall Meeting, San Francisco, CA, December 14, 2009, invited.

Michael, HA* and CI Voss, Is deep groundwater a sustainable source of arsenic-safe water in the Bengal Basin? Management insights from a regional modeling analysis, AGU Chapman Conference on arsenic in groundwater of southern Asia, Siem Reap, Cambodia, March 24-27, 2009, invited.

Michael, HA and CI Voss*, Hydrogeologic Analysis and Evaluation of Sustainable Management Alternatives in the Bengal Basin Aquifer System in the Face of Data Sparsity, National Ground Water Association Ground Water Summit, Memphis, TN, April 2, 2008.

Michael, HA and CI Voss*, Modelling evaluation of sustainable management alternatives in the high-Arsenic region of the Bengal Delta Aquifer (India and Bangladesh), MODELCARE 2007, Copenhagen, Denmark, September 9-13, 2007.

Michael, HA and CI Voss*, Transboundary hydrogeologic analysis of the Bengal Delta aquifer of India and Bangladesh, International Association of Hydrogeologists (IAH) 34th Congress, Beijing, China, October 2006.

Michael, HA and CI Voss*, Hydrogeologic analysis of the Bengal Delta aquifer of India and Bangladesh, IAH Symposium, “Aquifer Systems Management”, Dijon, France, May 30 – June 1, 2006.

Michael, HA* and CI Voss*, Hydrogeologic analysis of the Bengal Delta: Numerical modeling of groundwater flow, Symposium on Behavior of Arsenic in Aquifers, Soils and Plants: Implications for Management, Dhaka, Bangladesh, January 16-18, 2005.

 

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