Posts Tagged ‘water quality’

Monday, December 15, 2014

New Report Considers Future Of Lake Trout

Spawning-Lake-troutSince the retreat of the glaciers, lake trout (Salvelinus namaycush) have been the top native predator in Adirondack waters. These northern fish require true cold (less than 55°F) and move downward when surface waters warm in late spring and summer. Consequently, they are isolated to the largest and deepest Adirondack lakes – most of them deeper than 30 feet – where they stay in the dark chilly depths all summer and early fall. The species name namaycush is believed to be an Algonquin term for “dweller of the deep.”

This need for very cold, clean, high-oxygen water can bring to light otherwise invisible changes beneath the surface. Water quality in the Adirondack interior, where we don’t have much industry or farming, can be  abstract. You usually can’t see it, touch it or even taste it. But lake trout make the health of our coldest lakes real and tangible. » Continue Reading.


Monday, December 1, 2014

Cutting Road Salt On Adirondack Roads

Plow-600x382Standing next to a small, unnamed stream near where it empties into Mountain Pond on a cool September day, scientist Dan Kelting reads a sensor he just dipped in the water to measure electrical conductivity, which is used to gauge road-salt concentrations.

Pure water is a poor conductor of electricity, but road salt, or sodium chloride, increases conductivity. Based on the conductivity reading (285 microsiemens per centimeter), Kelting calculates that the water contains 80 milligrams of chloride per liter. This means the stream contains roughly 160 times more chloride than a similar size stream a few miles away.

Why the difference? The stream near Mountain Pond, north of Paul Smith’s College, is downstream from Route 30, a state highway that is heavily salted in the winter. The other stream, which Kelting refers to as Smitty Brook, runs through the Forest Preserve and is upstream of roads. » Continue Reading.



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