نتایج جستجو برای: inland waterways
تعداد نتایج: 8691 فیلتر نتایج به سال:
Pathogen Transmission Routes Research Program, describing pathogen pathways from farm animals to water bodies and measures that can reduce or prevent through the deposition of faeces by grazing animals directly into waterways in New Zealand. Bridging of streams intersected by farm raceways is an appropriate mitigation measure to prevent direct deposition during herd crossings, whilst fencing st...
Metal and pesticide contaminants were measured in water, sediment and fish species in various Gold Coast waterways, Queensland. With the exception of Cu, metal concentrations in water, measured using the diffuse gradients in a thin film (DGT) technique, complied with relevant Australian guidelines. Cu concentrations in these waterways have been related to recreational vessel activities previous...
This paper is devoted to the method of choosing a scheme for placing navigation signs on sections inland waterways ensure vessels with given level risks. The methods used are known from theory probability and mathematical statistics assessment risks, which proposed be performed by stochastic methods, estimating dis-placement center vessel's size variability maneuvering lane. It shown that accor...
Coastal ports operate through the interactions of shippers, carriers, dock owners, operators, pilots and the various governmental agencies responsible for maintaining and operating channels for safe and efficient movements. Monte Carlo simulation models of vessel movements in ports can be useful in determining the value of improvements such as channel widening or dredging. Such models require, ...
Monitoring and M A Record-Breakin Geophysical Mon Copyright 2011 b 10.1029/2011GM On 22–23 June 2010, the Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) L band radar imaged the Deepwater Horizon oil spill and the effects of oil that was transported within the Gulf of Mexico. We describe the campaign and discuss the unique contributions of the UAVSAR radar to the study of the detec...
Water reclamation and reuse is being actively promoted in Australia. In Queensland, surface-flow constructed wetlands with a diversity of macrophyte types offer the greatest potential for effluent polishing. Constructed wetlands in subtropical climates in coastal regions and arid climates in inland western regions are conducive to high macrophyte growth rates and nutrient removal, in particular...
OBJECTIVE To investigate whether the Victorian mandatory personal flotation device wearing regulations that came into effect on 1 December 2005 reduced drowning deaths among recreational boaters in Victoria, Australia. DESIGN A retrospective population-based 'before and after' study using Victorian coronial data on drowning deaths of occupants of recreational vessels operating in Victorian wa...
The evasion of carbon dioxide from inland waters was only recently included in assessments of the global carbon budget1,2. Current estimates of carbon dioxide release from global freshwater systems, including lakes and wetlands, range from 0.7 to 3.3 Pg C per year1,3-6. However, these estimates are based on incomplete spatial coverage of carbon dioxide evasion, and an inadequate understanding o...
Inland waterway dredging is daily maintenance which undertaken to ensure the safe navigation of ships. Due limitations river width, bridge height, and other conditions, projects usually require different types ships, namely dredgers, mud-carrying mud-blowing ships work in cooperation with each other. The proportion these three affects cost operation efficiency. Most existing algorithms calculat...
Inland waterways form a natural network that is an existing, congestion free infrastructure with capacity for more traffic. The European commission promotes the transportation of goods by ship as it is a reliable, efficient and environmental friendly way of transport. A bottleneck for transportation over water are the locks that manage the water level. The lockmaster’s problem concerns the opti...
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