Tidal Hydrodynamics in the Lower Columbia River Estuary through Depth Averaged Adaptive Hydraulics Modeling

Modeling the tidal and sub-tidal hydrodynamics in a shallow, micro-tidal estuary

Suspended particulate matter transport of polycyclic aromatic hydrocarbons in the lower Columbia River and its estuary

Analysis of suspended particulate material (SPM) collected from the Columbia River and its estuary in 2007– 2008 revealed the ubiquitous presence of polycyclic aromatic hydrocarbons (PAHs) from several distinct sources. The two dominant ones were: (1) a suite of non-alkylated, three to five-ringed compounds derived from high temperature combustion and (2) perylene, a compound of diagenetic orig...

Resilience in Lower Columbia River Salmon Communities

In 1992, the first listings of Columbia River salmon under the Endangered Species Act occurred. Regulation of the Columbia River gillnet fishery since that time has greatly reduced fishing time and economic return to the fishing fleet. The counties where two-thirds of the gillnetters reside have registered negative social statistics during this period, including drug and alcohol abuse rates, in...

Three-dimensional Modeling of Hydrodynamics and Dissolved Oxygen Transport in Tone River Estuary

1 School of Chemical Machinery, Dalian University of Technology (No.2 Linggong Road, Gangjingzi District, Dalian City, Liaoning Province, 116024, China) E-mail: [email protected] 2Fellow Member of JSCE, Professor, Dept. Environmental Science & Technology, Tokyo Institute of Technology (Nagatsuta 4259, Midori-ku, Yokohama, 226-8502, Japan) E-mail: [email protected] 3Member of JS...

Structure and dynamics of the Columbia River tidal plume front

[1] Time‐dependent buoyant plumes form at the outflow of tidally dominated estuaries. When estuary discharge velocity exceeds plume internal wave speed c, a sharp front forms at the plume’s leading edge that expands from the time‐dependent source. Using observations of the Columbia River tidal plume from multiple tidal cycles we characterize time‐evolving plume structure and quantify front spee...