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GroMoPo Metadata for Bengal Basin regional model


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Created: Feb 07, 2023 at 8:07 p.m.
Last updated: Feb 07, 2023 at 8:07 p.m.
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Abstract

Quantitative evaluation of management strategies for long-term supply of safe groundwater for drinking from the Bengal Basin aquifer (India and Bangladesh) requires estimation of the large-scale hydrogeologic properties that control flow. The Basin consists of a stratified, heterogeneous sequence of sediments with aquitards that may separate aquifers locally, but evidence does not support existence of regional confining units. Considered at a large scale, the Basin may be aptly described as a single aquifer with higher horizontal than vertical hydraulic conductivity. Though data are sparse, estimation of regional-scale aquifer properties is possible from three existing data types: hydraulic heads, C-14 concentrations, and driller logs. Estimation is carried out with inverse groundwater modeling using measured heads, by model calibration using estimated water ages based on C-14, and by statistical analysis of driller logs. Similar estimates of hydraulic conductivities result from all three data types; a resulting typical value of vertical anisotropy (ratio of horizontal to vertical conductivity) is 10(4). The vertical anisotropy estimate is supported by simulation of flow through geostatistical fields consistent with driller log data. The high estimated value of vertical anisotropy in hydraulic conductivity indicates that even disconnected aquitards, if numerous, can strongly control the equivalent hydraulic parameters of an aquifer system.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
India, Bangladesh
North Latitude
24.9510°
East Longitude
92.2795°
South Latitude
22.1566°
West Longitude
88.7907°

Content

Additional Metadata

Name Value
DOI 10.1007/s10040-009-0443-1
Depth 2400
Scale Other
Layers > 20 layers
Purpose Groundwater resources;Salt water intrusion
GroMoPo_ID 125
IsVerified True
Model Code MODFLOW
Model Link https://doi.org/10.1007/s10040-009-0443-1
Model Time SS
Model Year 2009
Model Authors H. A. Michael, C. I. Voss
Model Country India, Bangladesh
Data Available Report/paper only
Developer Email hmichael@udel.edu
Dominant Geology Unconsolidated sediments
Developer Country USA
Publication Title Estimation of regional-scale groundwater flow properties in the Bengal Basin of India and Bangladesh
Original Developer No
Additional Information
Integration or Coupling Solute transport
Evaluation or Calibration Static water levels
Geologic Data Availability

How to Cite

GroMoPo, D. Zamrsky (2023). GroMoPo Metadata for Bengal Basin regional model, HydroShare, http://www.hydroshare.org/resource/a0cda2414d8c4d23ba8c89d3a3cdbd80

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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