GroMoPo Metadata for Mahantango Creek MODFLOW model

Authors:

GroMoPo Kyle Compare

Owners:

gromopo_admin

Type:

Resource

Storage:

The size of this resource is 1.7 KB

Created:

Feb 08, 2023 at 2:40 p.m.

Last updated:

Feb 08, 2023 at 2:41 p.m.

Citation:

See how to cite this resource

Sharing Status:	Public
Views:	784
Downloads:	215
+1 Votes:	Be the first one to this.
Comments:	No comments (yet)

Abstract

Surface refraction seismic surveys were conducted within a 7.3 km(2) east-central Pennsylvania watershed to characterize the geometry of its shallow layered and fractured bedrock, These data were augmented with observations from 29 rock cores, Hydraulic conductivity (K) of the bedrock was determined by interval packer testing within the boreholes. Finally, the MODFLOW ground water model was applied to the layered aquifer geometry in a three-dimensional format to determine watershed-scale aquifer parameters by model calibration to observed watershed data. Seismic testing showed that the aquifer could be characterized by four distinct layers, each with its own characteristic seismic velocity Hydraulic conductivity determined by field testing decreased with depth, ranging from greater than 1.0 m day(-1) in the shallow, highly fractured layer to approximately 0.01 m day(-1) in the regional aquifer, Its distribution with depth reflected the increase in seismic velocities and decrease in extent of fracturing observed in the cores. Aquifer geometry determined from seismic testing and rock cores was used to define model layer geometry, and K values from model calibration compared favorably to those determined by field testing. The ground water model was also used in calibration mode to determine specific yields (S-y) of the characteristic fracture layers, These were all low, ranging from 0.005 in the highly fractured layer to 0.0001 in the regional aquifer. When aquifer geometry determined from detailed seismic surveys is used as the basis for watershed-scale ground water modeling in these shallow layered and fractured systems, hydraulic parameters derived by field testing compare well to those determined by model calibration.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

United States

North Latitude

41.0187°

East Longitude

-76.8134°

South Latitude

40.9155°

West Longitude

-77.0020°

Streets Terrain Satelite

Spatial Extent

Content

Learn more about the BagIt download

Select a file to see file type metadata.

Additional Metadata

Name	Value
DOI	10.1111/j.1745-6584.1999.tb00972.x
Depth
Scale	< 10 kmÂ²
Layers
Purpose	Groundwater resources;Scientific investigation (not related to applied problem)
GroMoPo_ID	278
IsVerified	True
Model Code	MODFLOW
Model Link	https://doi.org/10.1111/j.1745-6584.1999.tb00972.x
Model Time	SS
Model Year	1999
Model Authors	Gburek, WJ; Folmar, GJ; Urban, JB
Model Country	United States
Data Available	Report/paper only
Developer Email	wjg1@psu.edu; gjf103@psu.edu
Dominant Geology	Siliciclastic sedimentary (sandstones, shales)
Developer Country	USA
Publication Title	Field data and ground water modeling in a layered fractured aquifer
Original Developer	No
Additional Information	Uses seismic transects to characterize fracture patterns in the bedrock and these were incorporated into a MODFLOW model.
Integration or Coupling	None of the above
Evaluation or Calibration	Static water levels;Baseflow
Geologic Data Availability	No

How to Cite

GroMoPo, K. Compare (2023). GroMoPo Metadata for Mahantango Creek MODFLOW model, HydroShare, http://www.hydroshare.org/resource/cc2d4f09f38641e1825c4a441da15240

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

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

Comments

There are currently no comments

	Name:
	Organization:
	Email:
	Address:
	Phone:
	Homepage:
	Author Identifiers: