February 28, 2014
Dewatering Can Spell Disaster For Salmon
A team of researchers in Washington found success in boosting salmon survival numbers by altering operations of the Priest Rapids Dam in Washington state over the past 30 years. They planned water flows around salmon life events like egg hatching, when the young fish emerge from the gravel and when the smolts will migrate to sea. Before the specific operation timing, dropping water levels didn’t leave young fish or eggs enough water to stay immersed or they could leave young fish stranded on the shoreline or entrapped in pools of water that heat up or dry out. From their efforts, the team saw a 283% increase in the freshwater productivity in the particular area they were working.
[ Read the Article: Adjustments To Operation Of Pacific Northwest Dam Triple Salmon Numbers ]