caa a22 4500 467922500 CHVBK 20180406152920.0 cr unu---uuuuu 170328e20060101xx s 000 0 eng 10.1007/s00477-005-0012-7 doi (NATIONALLICENCE)springer-10.1007/s00477-005-0012-7 Spatial pattern of arsenic contamination in shallow wells of Bangladesh: regional geology and nonlinear dynamics [Elektronische Daten] [Faisal Hossain, Bellie Sivakumar] Since the discovery of large-scale arsenic contamination of groundwater in Bangladesh more than a decade ago, studies related to its spatial characterization have relied on geostatistical approaches and the classical notion of linear stochastic dynamics. This study explores an alternative nonlinear approach, with a motivation to possibly achieve more cost-effective solutions for Bangladesh. It investigates the existence of nonlinear deterministic and chaotic dynamic behavior in the spatial pattern of arsenic contamination in the shallow wells (depth<150m). The database comprises the nationwide arsenic survey completed in 1999 by the British Geological Survey (BGS) in collaboration with the Department of Public Health Engineering (DPHE) of Bangladesh. Distinction is made in terms of regional geology (Pleistocene vs. Holocene deposits/Northwest vs. Southwest) to understand the geologic dependency. Identification of possible presence of nonlinear deterministic and chaotic patterns is made via the Grassberger-Procaccia correlation dimension algorithm. The analysis yields correlation dimension values ranging anywhere from 8 to 11 depending on the region, suggesting that the arsenic contamination in space, from a chaotic dynamic perspective, is a medium- to high-dimensional problem. The dimension results also indicate that the spatial dynamics of arsenic may be moderately sensitive to geology, with Pleistocene aquifers appearing to require a minimum of about two less dominant processes/variables for its description when compared to that required by the Holocene aquifers. Based on these results, a qualitative discussion is also cast on the potential opportunities offered by a nonlinear deterministic and chaotic dynamic approach towards improving cost-effectiveness in siting new safe wells. Springer-Verlag, 2005 Groundwater contamination nationallicence Bangladesh nationallicence Shallow tube wells nationallicence Nonlinear dynamics nationallicence Regional geology nationallicence Remediation drilling nationallicence Cost-effectiveness nationallicence Hossain Faisal Department of Civil and Environmental Engineering, Tennessee Technological University, Box 5015, 38505-0001, Cookeville, TN, USA aut Sivakumar Bellie Department of Land, Air and Water Resources, University of California, 95616, Davis, CA, USA aut Stochastic Environmental Research and Risk Assessment Springer-Verlag 20/1-2(2006-01-01), 66-76 1436-3240 20:1-2<66 2006 20 477 https://doi.org/10.1007/s00477-005-0012-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00477-005-0012-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hossain Faisal Department of Civil and Environmental Engineering, Tennessee Technological University, Box 5015, 38505-0001, Cookeville, TN, USA aut NATIONALLICENCE 700 1- Sivakumar Bellie Department of Land, Air and Water Resources, University of California, 95616, Davis, CA, USA aut NATIONALLICENCE 773 0- Stochastic Environmental Research and Risk Assessment Springer-Verlag 20/1-2(2006-01-01), 66-76 1436-3240 20:1-2<66 2006 20 477 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer