Agricultural Drainage Study
Agricultural Drainage Assistance Program (ADAP)
A Study of Agricultural Drainage in the Puget Sound Lowlands to Determine Practices which Minimize Detrimental Effects on Salmonids: Final Report provides the results of a 5-year investigation of agricultural waterway maintenance practices and how they affect salmonids in King County drainage systems. The report encompasses four broad areas of study including fish biology, instream and riparian habitat and sediment. Within each of these areas, two to four research questions were developed with methodologies and quality assurance procedures, and a total of twelve specific questions were addressed by the study.
This report compiles research results conducted by numerous researchers from Washington State University and the University of Washington.
The Study of Agricultural Drainage in the Puget Sound Lowlands to Determine Practices which Minimize Detrimental Effects on Salmonids: Final Report is available in Adobe Acrobat format. For help using Acrobat files, please visit our Acrobat help page.
- Cover and Table of Contents (153 Kb)
- Chapter 1: Background, Organization, and Overview of the Study (144 Kb)
- Chapter 2: Characterization of the Utilization of Agricultural Waterways by Salmonid Fishes (1 Mb)
- Chapter 3: Identification of an Index of Salmonid Abundance in Agricultural Waterways (514 Kb)
- Chapter 4: Determination of a Safe Method for the Removal of Salmonids Prior to Excavation of Agricultural Waterways (785 Kb)
- Chapter 5: Determining if Salmonid Distribution in Agricultural Watercourses is Preferentially Associated with Woody Debris (249 Kb)
- Chapter 6: Investigating Whether Dissolved Oxygen Levels in Agricultural Watercourses are Different than those in non-Agricultural Watercourses (832 Kb)
- Chapter 7: Investigation of the Hydraulic Diversity Created by Woody Debris in Agricultural Waterways (2.5 Mb)
- Chapter 8: Evaluation of the Value of Surrounding Vegetative Regime to Salmonids in Agricultural Waterways (1 Mb)
- Chapter 9: Modeling Water Temperature in King County’s Agricultural Drainage Watercourses (664 Kb)
- Chapter 10: Phalaris arundinacea Control and Riparian Restoration within Agricultural Watercourses (1 Mb)
- Chapter 11: Develop Technology to Minimize Sediment Mobilization after Channel Excavation (500 Kb)
- Chapter 12: Evaluation of Techniques to Extend Maintenance Cycles (538 Kb)
- Chapter 13: Determining Whether Excavation Will Improve Drainage of Adjacent Agricultural Lands (592 Kb)
- Chapter 14: Project Summary (66 Kb)
For more information about A Study of Agricultural Drainage in the Puget Sound Lowlands to Determine Practices which Minimize Detrimental Effects on Salmonids: Final Report, please contact Kollin Higgins, Senior Ecologist, WLR Science and Technical Support Section.