The Tertiary geologic evolution of the Oregon and Washington continental margin was molded by episodic periods of convergence between the Pacific oceanic plates and the North American plate. This margin is the site of a deep basin that is floored by Paleocene to lower Eocene oceanic crust and contains more...
Statistical summaries of streamflow data at 212 stream-gaging sites
are presented in this report to aid in appraising the hydrology of river
basins in Western Oregon. Records for 21 gaging stations were compiled
into separate periods owing to changes in regulation during the period
of data collection. The periods before...
Statistical summaries of streamflow data at 212 stream-gaging sites
are presented in this report to aid in appraising the hydrology of river
basins in Western Oregon. Records for 21 gaging stations were compiled
into separate periods owing to changes in regulation during the period
of data collection. The periods before...
Statistical summaries of streamfiow data at 123 stream-gaging sites
are presented in this report to aid in appraising the hydrology of river
basins in Eastern Oregon. Records for 13 gaging stations were compiled
into separate periods owing to changes in regulation during the period
of data collection. The periods before...
Statistical summaries of streamfiow data at 123 stream-gaging sites
are presented in this report to aid in appraising the hydrology of river
basins in Eastern Oregon. Records for 13 gaging stations were compiled
into separate periods owing to changes in regulation during the period
of data collection. The periods before...
Statistical summaries of streamflow data at 212 stream-gaging sites
are presented in this report to aid in appraising the hydrology of river
basins in Western Oregon. Records for 21 gaging stations were compiled
into separate periods owing to changes in regulation during the period
of data collection. The periods before...
Statistical summaries of streamfiow data at 123 stream-gaging sites
are presented in this report to aid in appraising the hydrology of river
basins in Eastern Oregon. Records for 13 gaging stations were compiled
into separate periods owing to changes in regulation during the period
of data collection. The periods before...
The U.S. Geological Survey (USGS) has worked cooperative with the Unified Sewerage Agency of Washington County (USA) since 1990 to assess water quality in the Tualatin River Basin. The objectives of this study were to: assess the occurrence and magnitude of trace element and selected organic contaminants in streams of...