Analysis Tools and Modeling Review

Analysis Tools

Below are descriptions of various tools that Oregon DEQ uses for water quality analysis. These tools have been developed and are maintained by Oregon DEQ staff members. Listed below are brief descriptions of each water quality analysis tool and links for downloading the applications and their documentation.

This page will be periodically updated. New applications and new versions of current applications will be made available for downloading.

TTools

TTools is an ArcGIS extension used to sample geospatial data and assemble high-resolution inputs for the Heat Source model or other water quality analysis.  Appropriate use and application are the sole responsibility of the user.

• Download: TTools 7.56 ZIP (3.6 MB). Requires ArcGIS 9.0 or higher, Spatial Analyst. Updated November 2009.
• Download: TTools 7.21 ZIP. Requires ArcView version 3.x, Spatial Analyst.  Updated June 2005.

Heat Source

Heat Source is a computer model used by Oregon DEQ to simulate stream thermodynamics and hydrology. It was developed in 1996 as a Masters Thesis at Oregon State University in the Departments of Bioresource Engineering and Civil Engineering. DEQ currently maintains the Heat Source methodology and computer programming. Appropriate model use and application are the sole responsibility of the user.

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• Download: Heat Source v 8.0.4 ZIP (23MB). Requires Microsoft Windows Excel 2002 or 2007. Updated March 2009.
• Download: Heat Source v 7.0 XLS (5.6MB). Requires Microsoft Windows Excel. Updated June 2005.
• Heat Source Model User Guide (For v 7.0) PDF (4MB)
• Download: Shade-a-lator 6.2  (595KB). Stand alone effective shade model used in Heat Source 6. Requires Microsoft Windows Excel. Updated November 2006.
  
  
• Heat Source Model Methodology Review

CE-QUAL-W2

CE-QUAL-W2 is a water quality and hydrodynamic model in 2D (longitudinal-vertical) for estuaries, lakes, reservoirs, and large river systems.  W2 models basic eutrophication processes such as temperature-nutrient-algae-dissolved oxygen-organic matter and sediment relationships.  The current model release enhancements have been developed under research contracts between the US Army Corps of Engineers and Portland State University under supervision of Dr. Scott Wells.  DEQ uses this model for temperature, dissolved oxygen, pH, and other nutrient assessments.

QUAL2Kw

QUAL2Kw is a one dimensional steady state modeling framework written in Excel/VBA.  QUAL2Kw is adapted from the QUAL2K model that was originally developed by Dr. Steven C. Chapra of Tufts University.  DEQ uses this model for dissolved oxygen and pH assessments in rivers and streams.

Modeling Review

• Oregon DEQ TMDL Modeling Review PDF

[print version]