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Assessment of Sub-surface Lithology and Aquifer Conditions of Fulbaria Thana for Groundwater Development

A. A. Hassan
Chief Scientific Officer and Head
Agricultural Engineering Division, Bangladesh Institute of Nuclear Agriculture, P.0. Box 4, Mymensingh 2200

K. Habib
Fonner Graduate Student
Department of Irrigation and Water Management, Bangladesh Agricultural University.

M.S. U. Talukder
Professor and Head
Department of Irrigation and Water Management, Bangladesh Agricultural University.

Abstract/ Executive Summary:

Lithogical study was conducted for groundwater development in Fulbaria Thana. The graphically presented sub-surface litholog; as obtained from borelogs of thirteen deep tubewells from thirteen individual unions of the Thana provided information on vertical and lateral extent of different layers and distribution of formation materials. The aquifer formation was stratified with clay, silty clay, sandy clay and fine sand at the upper portion while medium sand, coarse sand, gravels and their mixtures at the lower portion. The thickness of clay, silty or sand: clay layers ranged from 3 to 31 5m having an average thickness of 21.82m that existed below the ground surface. The thickness of composite aquifer varied from 14 to 47m having an average thickness of 46.3m. The thickness of the main or exploitable aquifer ranged from 24 to 69.5m having an average thickness of 46.3m. The aquifer formations provide indications that the aquifer at the study area is found to be well productive and has the potential for groundwater abstraction.

Keywords: Sub-surface lithology, Aquifer, Groundwater development

Location: Fulbaria Thana, Mymensingh

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Groundwater

Objectives:

To conduct location specific comprehensive study on sub-surface lithology of aquifer for realistic assessment of groundwater utilization.

Methodology:

The borelogs and fixtures of 13 deep tubewells (DTW) -- one from each union of Fulbaria Thana have been collected from Bangladesh Agricultural Development Corporation office, Mymensingh. The lithological interpretation is made from the records of the occurrence of particle size, on a percentage basis. A three dimensional isometric view (panel diagram) of the vertical and lateral stratification of the sub-surface formation have been constructed based on 13 borelogs lithology which is representative of the whole study area.

Source of Information: Journal of the Institution of Engineers, Bangladesh Agncultural Engineering Division. Vol. 27/AE, No.1. Dec. 2000

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

a) The sub-surface formation of the study area was stratified with clay, sandy clay and fine sand at the upper part while medium sand, coarse sand, gravel and their mixture at the lower part of the sub surface lithology. b) The thickness of clay, silty or sandy clay layers ranging from 3 m to 31.5 m having an average thickness of 21 .82 m existed below the ground surface. c) The thickness of composite aquifer varied from 14 m to 47 m having an average thickness of 24.37 m. The main aquifer or the exploitable aquifer thickness varied from 24 m to 69.5 m having on average thickness of 46.3 m. d) Structural feature of hydrogeological significance was not observed in the study area.

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