Document Type

Technical Report

Publication Date



Bull Run River (Or.) -- Water quality -- Mathematical models, Water quality -- Oregon -- Bull Run River -- Computer simulation, Watershed management -- Oregon, Hydrologic models


The City of Portland, Water Bureau currently operates 2 Bull Run reservoirs, Reservoir #2 and Reservoir #1 as a water supply source in the Bull Run watershed shown in Figure 1 and Figure 2. The Water Bureau wants to operate their water supply system in order to meet both water supply objectives and fish habitat objectives downstream of the Bull Run reservoirs in Bull Run River. In addition, a third Bull Run reservoir has been proposed as an additional water supply source. This reservoir also may be used to meet water supply and fish habitat objectives in Bull Run River.

This proposal addresses performing the following tasks to evaluate these objectives:

  • Gather data to construct a computer simulation model of the Bull Run system including Bull Run River, Bull Run Reservoirs #1 through #3 and the river basin without reservoirs.
  • Ensure that the model accurately represents the system physics, chemistry and biology.
  • Use the model to evaluate how to meet water supply and fish habitat objectives by implementation of management scenarios.


Forms part of the Bull Run River and Reservoir (BRRR) Model project, funded by the City of Portland Water Bureau, to develop a hydrodynamic and water quality model of the Bull Run River and Bull Run Reservoirs 1 and 2.

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