GroMoPo Metadata for UK Chalk Aquifer adit model

Authors:

GroMoPo Kyle Compare

Owners:

gromopo_admin

Type:

Resource

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The size of this resource is 1.6 KB

Created:

Feb 08, 2023 at 8:36 p.m.

Last updated:

Feb 08, 2023 at 8:37 p.m.

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Abstract

Many of the large ground water sources in the Chalk Aquifer have adits, horizontal tunnels below the ground water table, which are connected to pumped wells. The pow in an adit may be pipe or open channel flow. Adits in the United Kingdom are normally full of water, so that the adit flow is pressurized. Darcy's formula is not applicable to the adit, and conventional ground water models are inappropriate to model the aquifer-adit system. The U.S. Geological Survey (USGS) model BRANCH simulates one-dimensional unsteady, nonuniform, multiple-branch interconnected open channel now MODBRNCH incorporates BRANCH into MODFLOW simulating open channel and aquifer interaction using deterministic responses of both systems. An aquifer-adit model can be created by two steps, First, an integrated surface-ground water model (MODBRNCH) enables open channel flow to be simulated. Second, introducing a fictitious narrow slot (Preissmann slot) above the adit allows pipe flow to be simulated by open channel flow equations. The slot does not affect the adit cross-section area, and the water level in the slot represents the pressurized adit head, which can be used by MODBRNCH to calculate the water exchange between aquifer and adit according to their head difference, The approach has been tested on the Wilmington public supply source in southeast England.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

United Kingdom

North Latitude

51.4459°

East Longitude

0.2313°

South Latitude

51.4033°

West Longitude

0.1546°

Streets Terrain Satelite

Spatial Extent

Content

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Additional Metadata

Name	Value
DOI	10.1111/j.1745-6584.2000.tb00206.x
Depth	120
Scale	11 - 101 kmÂ²
Layers	3
Purpose	Groundwater resources;Decision support
GroMoPo_ID	419
IsVerified	True
Model Code	MODFLOW;BRANCH (MODBRANCH)
Model Link	https://doi.org/10.1111/j.1745-6584.2000.tb00206.x
Model Time	SS
Model Year	2000
Model Authors	Zhang, BY; Lerner, DN
Model Country	United Kingdom
Data Available	Report/paper only
Developer Email	NA
Dominant Geology	Carbonate (including karst)
Developer Country	England
Publication Title	Modeling of ground water flow to adits
Original Developer	No
Additional Information	A coupled groundwater-surface water model to examine the exchange between adits and the Chalk aquifer around Wilmington, England.
Integration or Coupling	Surface water
Evaluation or Calibration	Static water levels
Geologic Data Availability	No

How to Cite

GroMoPo, K. Compare (2023). GroMoPo Metadata for UK Chalk Aquifer adit model, HydroShare, http://www.hydroshare.org/resource/64804172af864f75a2713b8f1c21d139

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

http://creativecommons.org/licenses/by/4.0/

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