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Environmental factors used to subdivide the western Lake Michigan drainages into relatively homogeneous units for water-quality site selection

Dale M. Robertson·David A. Saad
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Abstract

In 1991, the National Water-Quality Assessment (NAWQA) Program was fully implemented by the U.S. Geological Survey (USGS). The goals of the NAWQA program are to (1) provide a nationally consistent description of water-quality conditions for a large part of the Nation’s water resources; (2) define long-term trends (or lack of trends) in water quality; and (3) identify, describe, and explain, as possible, the major factors that affect the observed water-quality conditions and trends (Hirsch and others, 1988).

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90° N90° S · 180° W ← longitude → 180° E
Source-reported bounding extent: 42.50450285299051° to 46.807579571992385° latitude; -89.912109375° to -86.561279296875° longitude. This indicates report coverage, not an exact sampling location. View area on OpenStreetMap.

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Dale M. Robertson, David A. Saad. 1995. Environmental factors used to subdivide the western Lake Michigan drainages into relatively homogeneous units for water-quality site selection. https://doi.org/10.3133/fs22095

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