The Sacramento regional model

THE SACRAMENTO REGIONAL MODEL

Project Review and Final ReportNorm Jones

Michelle Smilowitz

Company Background

Software development

Training Consulting

www.aquaveo.com

Arc HydroGroundwater

Derrick

Modeling Protocol

Adapted from Anderson & Woessner, 1992

Norm

Michelle

Norm

Comparison with

Field Data

Field Data

Field Data

Field Data

*includes sensitivity analysis

Define Purpose

Conceptual Model

Code Selection

Model Design

Calibration*

Prediction*

Postaudit

Are the capabilities of the code consistent with the modeling objectives?

Is the code verified and well-established? Can the code simulate each of the critical

processes in the conceptual model at a sufficient level of accuracy?

Is the code easy to use and maintain?

Code Selection Criteria

Parsimony

“Everything should be made as simple as possible. But not simpler.” – Albert Einstein

Groundwater models should be complex enough to be useful, yet simple enough to be cost-effective and manageable.

MODFLOW

Developed and supported by the USGS

Public Domain Widely-used Rich suite of add-

ons, utilities, & companion programs

Cost-effective

1

1

2

4

119

57

8

3

10

6

1. Confined/unconfined aquifers2. Interbeds3. Faults and barriers4. Confining units5. Rivers6. Drains and springs

7. Streams8. Reservoirs9. Recharge10. Evapotranspiration11. Wells

Particle Tracking with MODPATH

Contaminant Transport Modeling

MT3DMS, RT3D, SEAM3D

Surface Water/Ground WaterInteraction

Losing River

Gaining River

Disconnected River

Flow budget output Detailed summary of

SW/GW exchange quantities

River package (RIV) Stage specified

Streamflow-routing package (SFR) Flow specified Routing Stage calculated

Surface Water/Ground Water

Low development cost 12 months $267,000

Cost savings due to Mature suite of pre- and post-processing

tools Leveraging GIS linkage and tools Model portability – widespread expertise

Development and Maintenance Costs

12

Groundwater Modeling System (GMS)

Conceptual Model - Site Map

Clearwater Well

StillwaterReservoir

WhitewaterRiver

BigwaterLake

Feature Objects

Well PointGeneral Head

PolygonRiverArcs

Specified Head Arcs

Variable Head

Polygon

Grid-Based Numerical Model

Arc Hydro Groundwater

Data model and tools for managing groundwater data in ArcGIS