Synoptic Water-Quality Data
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Synoptic samples were not collected in the Crater
Lake HBN Basin as part of this study because the lake receives only 15 percent of its
annual water input from surface runoff. Several studies, however, have investigated the
chemistry of springs and streams emanating from the caldera walls and along the
flanks of Mount Mazama (Thompson and others, 1987; Gregory and others, 1990;
Nathenson and Thompson, 1990). These studies have used spring chemistry to investigate
hydrologic losses from the lake and to evaluate the predominant solute sources to the lake.
