Aquifer Geometry and Water Quality in Relation to Occurrence and Distribution of Peat in Baghia-Chanda Beel, Bangladesh

Authors

  • F. Ferdous University of Dhaka
  • M. R. Rafiq
  • M. I. Mahmud

DOI:

https://doi.org/10.3329/jsr.v8i3.25360

Keywords:

Aquifer geometry, Hydrogeochemistry, Hydrogeology, Peat basin, Water quality.

Abstract

Baghia-Chanda Beel, largest peat basin in Madaripur and Gopalganj (Bangladesh) districts occupies thick deposits of peat. Study focuses on the aquifer geometry and geochemical evaluation of groundwater in relation to occurrence and distribution of peat. Landuse map is generated to show the surface distribution of peat. Thick peat and clay layer respectively, with an average thickness of 7 ft, has been observed throughout the study area. Principal productive aquifer about 40 ft thick, is found at depth between 35 to 145 ft below ground surface. According to pH and EC values, groundwater is mildly acidic to slightly alkaline and fresh to brackish. High bicarbonate concentration which is more likely to be attributed from the oxidative degradation of peat is found at shallow aquifer below peat. Elevated sodium (Na+) and chloride (Cl-) concentrations in deep aquifer are due to the trapping of ancient sea water in the subsurface during Quaternary period. Although  deep aquifer is extensively low in arsenic, 68% and 44% shallow groundwater samples are arsenic (As) contaminated according to WHO, 2011 and Bangladesh Drinking Water Standard (DoE, 1997) limit respectively. Assessment of Water Quality Indexes (WQI>100) suggests that water from deep aquifer is more suitable for drinking purposes.

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Author Biography

F. Ferdous, University of Dhaka

Junior Hydrogeologist
Managed Aquifer Recharge for Community Water Supply in Saline Areas
Department of Geology
University of Dhaka, Dhaka-1000.

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Published

2016-09-01

How to Cite

Ferdous, F., Rafiq, M. R., & Mahmud, M. I. (2016). Aquifer Geometry and Water Quality in Relation to Occurrence and Distribution of Peat in Baghia-Chanda Beel, Bangladesh. Journal of Scientific Research, 8(3), 355–370. https://doi.org/10.3329/jsr.v8i3.25360

Issue

Section

Section B: Chemical and Biological Sciences