Water Temperature and Emergence

Ives Island Surveys

Columbia River Water Temperature, Temperature Units and Emergence Dates

• 2005 to 2006 TU Estimates for Ives Island Chinook and Chum
• 2004 to 2005
  • Last Catch Date of "newly emerged" fry (>40mm) at Ives island 2000-2004
  • Accumulated Gauge 1 Temperature Units from Oct 1st - March 28th, 2000-2004
• 2003 to 2004
• 2002 to 2003 or 2002 to 2003 with 2001 water temperatures
• 2001 to 2002
• 2000 to 2001 or 2000 to 2001 with Chum Redd Counts

Comparison of beginning emergence dates to catch dates of juvenile fall chinook and chum below Bonneville Dam

• First Catch 1999 to 2003
• Peak Catch 1999 to 2002

Data Courtesy of ODFW