Geology topics

Research about Columbia River, Willamette River

Source-linked reports with geographic coverage including Columbia River, Willamette River.

2 recordsLinked to original sources

USGS1978

Monitoring water-quality during pilot-dredging operations in the Willamette and Columbia Rivers, Oregon

Water quality was monitored in the Willamette and Columbia Rivers during a pilot dredging operation on December 16, 1977. Monitoring included in-situ measurements of pH, temperature, dissolved oxygen, and conductivity in the Willamette and Columbia Rivers; analyses of dissolved ammonia, dissolved manganese, suspended-sediment concentration and particle size, loss on ignition, and total organic carbon in river-water samples; and analyses of percent moisture, particle size, density, selected nutrients, total organic carbon, and loss on ignition in dredged material and barge-overflow samples.

Oregon↗

USGS1950

Pollution in the lower Columbia Basin in 1948 with particular reference to the Willamette River

Development of the salmon resources of the lower Columbia River Basin appears as sound insurance against the threat of a serious reduction in the runs to the upper river areas through the multiple-purpose programs of water development now under way by the Corps of Engineers, the Bureau of Reclamation, and private interests. Any comprehensive plan for the full development of the fisheries resources in the lower Columbia Basin must be predicated upon accurate knowledge of the waters therein polluted to a degree affecting fish life. Pollution surveys have been made in the lower Columbia Basin at various times in the past -- the most intensive studies having been made in the Willamette Valley.

Oregon↗