Studies have been made of a series of ski area developments in the Sangre de Cristo Mountains of New Mexico, U.S.A. These developments represent increasing impact severity on a single area as well as different areas subject to different types of impacts. Studies of nutrient budgets and water quality showed that the major factor affecting water quality was road salt application. Sewage disposal affected water quality to a minor degree while poma lift construction and light tree removal had no measurable effect on the water quality parameters studied. Forest Sci. 23:167-179.
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James R. Gosz (1977) studied this question.