Research

Abstract

PNW Funded Projects
2001
2000
1999
1998
1997
1996
1995

PNW Project Overview 1995

Management of Peak Summer Water Temperatures in Type 4 and 5 Streams Within Recently Harvested Forest Areas 

Principal Investigator:  
Dr. Susan Bolton, University of Washington, Center for Streamside Studies

Awarded: $34,000

Project Description:
High summer temperature has been identified as one of the major factors causing decline of salmonid fisheries throughout the temperate climates. There is an interest in looking upstream above the currently protected Type 3 waters to determine what can be done to prevent warm water from entering fish bearing stream areas. Project objectives are:

(1)   Map stream origins within several recently harvested study areas and paired unharvested areas. Classify stream origins as from springs, seeps, and channel interception of subsurface flow.

(2)   Record the location, surface area, seasonal flow and temperature of inflows, which start within and above stream channels. Record shade cover, soil temperature, air temperature and solar radiation energy, which affect stream temperature.

(3)   Determine temperature and thermal energy gains of water entering the stream channel and along the length of exposed channels through measurement and by energy balance calculations.

(4)   Devise environmentally benign temporary shade structures for areas of high thermal energy gain. 

(5) Test the effectiveness of constructed temporary shade to reduce peak summer temperatures.  

Project Status:
Data collection and analysis have been completed for this project. A thesis submitted by Jenelle S.D. Black entitled "Summer Temperatures in Small Stream Sources on Managed Olympic Peninsula Timberlands" was received on June 7, 2001.

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