Temperature Effects of Point Sources, Riparian Shading, and Dam Operations on the Willamette River
In this investigation, the flow and temperature models that formed the basis of the Willamette temperature TMDL were used to determine a spatially indexed heating signature for each of the modeled point sources, and those signatures then were combined into a user-friendly, spreadsheet-based screening tool. The Willamette River Point-Source Heat-Trading Tool allows a user to increase or decrease the heating signature of each source and thereby evaluate the effects of a wide range of potential point-source heat trades. By simply selecting a target time period and modifying the strength factors associated with each point source in an iterative fashion, potential trades can be defined and the effects on the temperature of the river can be estimated.
The predictions of the Trading Tool were verified by running the Willamette flow and temperature models under four different hypothetical trading scenarios:
Results from these test cases are documented more fully in an available
the predictions of the Trading Tool for these tests were accurate to
within about 0.005 degrees Celsius. The Trading Tool may be downloaded
from the following links:
Please note that the "professional" version is identical to version 1.5 but has one additional feature (two-site trade charts). Use of that feature should be avoided unless you have had specific instruction in how to use it properly.