Education NEED COPY

The Four H's


Trout Unlimited groups the threats to coldwater fisheries into four broad categories, which, by coincidence, all start with "H":

  • Habitat covers water pollution, the physical condition of stream channels, habitat damage caused by small dams, irrigation withdrawals and other diversions, and other aquatic habitat needs
  • Hydropower deals with the stream flows and fish migration problems associated with hydroelectric dams
  • Harvest covers the balance between wild fish sustainability and commercial and recreational harvest
  • Hatcheries encompasses all the direct and indirect threats posed by artificial propagation of fish, including genetic, ecological and economic issues

The links above have a brief description of each "H," an example of some of the specific problems associated with each, and an example of how TU is providing solutions to those problems.

News and Updates

 Wild Salmon
Under Threat of Extinction, Study Shows More...
 National Park Service
Awards Contract for the Elwha Water Facilities.
 Planned whitewater park
is prompting anxiety over possible impacts to the river's native fish. more...
 Cedar River
Chinook returning to Cedar River big-time. more...
 Women's workshop
Women's workshop offers instruction on fishing, hunting, outdoor skills. more...
 Obscure salmon  struggles to survive!
Beneath the surface of Lake Sammamish Washington's native salmon are struggling to survive. More...
 Youth Conservation
2008 Youth Conservation
& Fly Fishing Academy.