Warming waterways

WATER TREATMENT: Sweeteners Persist in Waterways

A 438 volume 117 | number 10 | October 2009 • Environmental Health Perspectives Vehicles Concentrate Nicotine A study by Patrick Breysse et al. published online 25 August 2009 ahead of print in Tobacco Control found that vehicle passengers riding with smokers may be exposed to nicotine levels 40–50% higher than those found in restaurants and bars that permit smoking. Nicotine concentrations ins...

Nutrient Pollution: A Persistent Threat to Waterways

NaSS: system simulation of inland waterways

Proceedings of the International Conference on Harbor, Maritime and Multimodal Logistics Modeling & Simulation, HMS 2009 ISBN 978-84-692-5416-5 146 ABSTRACT The Navigation System Simulation (NaSS) suite of tools has been developed by the Institute for Water Resources of the U.S. Army Corps of Engineers (Corps), as part of the Navigation Technologies Research Program. NaSS is composed of two pri...

Predicting oxygen content downstream of weirs, spillways and waterways

P. Novak, Consultant In his paper the author has made a very useful contribution to the subject of prediction of oxygen content downstream of spillways, particularly in the case of surface aeration. However, some of the analysis referring to previously published results of oxygen uptake at hydraulic structures is not always rigorous enough. 40. The equations quoted for Avery and Novak apply to ...

Stochastic Modeling of Tanker Traffic through Narrow Waterways

In this paper a stochastic model of tanker traffic is developed to determine the probability of vessel casualties resulting from the transit traffic through a narrow waterway. More specifically, the present study models the collision and grounding probabilities in a waterway resulting from course changes due to hydrodynamic forces acting on the vessel. The computation of vessel positions and th...