GroMoPo Metadata for Choele Choel Island (Patagonia) MODFLOW + HEC-RAS model

Authors:

GroMoPo Sacha Ruzzante

Owners:

gromopo_admin

Type:

Resource

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The size of this resource is 3.0 KB

Created:

Feb 07, 2023 at 7:31 p.m.

Last updated:

Feb 07, 2023 at 7:31 p.m.

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Abstract

This work describes the application of a methodology designed to improve the representation of water surface profiles along open drain channels within the framework of regional groundwater modelling. The proposed methodology employs an iterative procedure that combines two public domain computational codes, MODFLOW and HEC-RAS. In spite of its known versatility, MODFLOW contains several limitations to reproduce elevation profiles of the free surface along open drain channels. The Drain Module available within MODFLOW simulates groundwater flow to open drain channels as a linear function of the difference between the hydraulic head in the aquifer and the hydraulic head in the drain, where it considers a static representation of water surface profiles along drains. The proposed methodology developed herein uses HEC-RAS, a one-dimensional. (1D) computer code for open surface water calculations, to iteratively estimate hydraulic profiles along drain channels in order to improve the aquifer/drain interaction process. The approach is first validated with a simple closed analytical solution where it is shown that a Piccard iteration is enough to produce a numerically convergent and mass preserving solution. The methodology is then applied to the groundwater/surface water system of the Choele Choel Island, in the Patagonian region of Argentina. Smooth and realistic hydraulic profiles along drains are obtained while backwater effects are clearly represented. (C) 2008 Elsevier B.V. All rights reserved.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Argentina

North Latitude

-39.2918°

East Longitude

-65.4850°

South Latitude

-39.5266°

West Longitude

-65.8956°

Streets Terrain Satelite

Spatial Extent

Content

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Additional Metadata

Name	Value
DOI	10.1016/j.jhydrol.2008.02.002
Depth	20
Scale	101 - 1 000 kmÂ²
Layers	1 layer
Purpose	Groundwater resources;Agricultural growth
GroMoPo_ID	108
IsVerified	True
Model Code	MODFLOW;HEC-RAS
Model Link	https://doi.org/10.1016/j.jhydrol.2008.02.002
Model Time
Model Year	2008
Model Authors	L. B. Rodriguez, P. A. Cello, C. A. Vionnet, D. Goodrich
Model Country	Argentina
Data Available	Report/paper only
Developer Email	leticia@fich1.unl.edu.ar
Dominant Geology	Unconsolidated sediments
Developer Country	Argentina
Publication Title	Fully conservative coupling of HEC-RAS with MODFLOW to simulate stream - aquifer interactions in a drainage basin
Original Developer	No
Additional Information	This work describes the application of a methodology designed to improve the representation of water surface profiles along open drain channels within the framework of regional groundwater modelling. The proposed methodology employs an iterative procedure that combines two public domain computational codes, MODFLOW and HEC-RAS. In spite of its known versatility, MODFLOW contains several limitations to reproduce elevation profiles of the free surface along open drain channels. The Drain Module available within MODFLOW simulates groundwater flow to open drain channels as a linear function of the difference between the hydraulic head in the aquifer and the hydraulic head in the drain, where it considers a static representation of water surface profiles along drains. The proposed methodology developed herein uses HEC-RAS, a one-dimensional (1D) computer code for open surface water calculations, to iteratively estimate hydraulic profiles along drain channels in order to improve the aquifer/drain interaction process. The approach is first validated with a simple closed analytical solution where it is shown that a Piccard iteration is enough to produce a numerically convergent and mass preserving solution. The methodology is then applied to the groundwater/surface water system of the Choele Choel Island, in the Patagonian region of Argentina. Smooth and realistic hydraulic profiles along drains are obtained while backwater effects are clearly represented.
Integration or Coupling	Surface water
Evaluation or Calibration	Static water levels
Geologic Data Availability

How to Cite

GroMoPo, S. Ruzzante (2023). GroMoPo Metadata for Choele Choel Island (Patagonia) MODFLOW + HEC-RAS model, HydroShare, http://www.hydroshare.org/resource/abc3ae159c8f4a0ead7bf16c3ab0b3a5

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

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

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