About Us

What's New?

Get Involved!

Tualatin Basin
Information

Calendar

Restoration
Resources

Just for Kids

Frequently
Asked Questions

Links

Search/Site Map

Lower Gales Creek Enhancement Planning
Geomorphic Assessment • Technical Study

Tualatin River Watershed Council

July 28, 2006

PDF file (downloadable file, 4.18 MB)

Website Table of Contents

1.Introduction

1.1 Problem Statement
1.2 Study Goals and Objectives

2. Setting

3. Channel Conditions

3.1 Historic Conditions
3.2 Implications of Morphologic Change on Stream Function
3.3 Reach Delineation and Description

4. Existing Conditions

4.1 Bank Stability
4.2 Hydrology
4.3 Channel Morphology / Sediment Transport
4.4.1 Sediment Transport Calculations
4.4.2 Sediment Transport Dynamics

5. Salmonid Restoration

5.1 Past Enhancement/Restoration Work
5.2 Evaluation of Recommended Restoration Sites
5.3 Additional Restoration Recommendations

6. References

List of Tables

Table Description

Table 1: Geomorphic reach descriptions

Table 2: Bank erosion potential matrix

Table 3: Bank erosion potential results

Table 4: Flow monitoring site descriptions

Table 5: Flood frequency summary

Table 6: Exceedence probability summary

Table 7: Bed load flux - Summary of results

Table 8: Restoration project summary

List of Figures

Figure Description

Figure 1: General location map

Figure 2: Geologic map for Gales Creek

Figure 3: Erosion hazard map for Gales Creek

Figure 4: Historic and current floodplain extent

Figure 5: Floodplain extent for 1974 and 1989

Figure 6: Reach breaks

Figures 7abc: Bank stability survey results

Figure 8: Reach 1 - Cross-sections and bed substrate

Figure 9: Reach 4 – Cross-sections and bed substrate

Figure 10: Bed load rating curve for Reach 1

Figure 11: Bed load rating curve for Reach 4

Figure 12ab: Potential salmonid habitat enhancement areas

 

 

Tualatin River Watershed Council, P.O. Box 338, Hillsboro, OR 97123-0338
Phone: (503) 846-4810 • Fax: (503) 846-4845 • Email: email us

 

This site made possible by a grant from Tualatin Valley Water Quality Endowment Fund of the Oregon Community Foundation
Site hosting courtesy of Pacific University