نتایج جستجو برای: waterway transport
تعداد نتایج: 274526 فیلتر نتایج به سال:
Maritime transportation functions as the backbone of world trade. The U.S. inland waterway system is comprised 12,000 miles navigable waterways that connect and move freight between global supply chain thirty eight States. When investing in infrastructure, we should aim to maximize all benefits associated with investment including flood protection, water supply, hydropower generation, recreatio...
Abstract This paper exposes how HIDROVIA S.A. (Inland Waterway Concession company) worked in the Middle Paraná River inland waterway “Santa Fe – Confluence” to maintain navigation channel without dredging works by means of four steps: frequent bathymetric surveys, study AIS vessels tracks, a special coordination logistic river with technical team and buoy tenders crew effective communication pl...
Medieval Vienna was situated at the main arm of the swiftly flowing alpine Danube. From the fourteenth century onwards, the river gradually moved away from the city. This marked the beginning of 500 years of human intervention to prevent further displacement of the river and to preserve the waterway as a vital supply line. Archival research and the GIS-based reconstruction of the past riverscap...
Spatial monitoring of tetracycline (TC)-resistant bacteria in sediments of the Mekong River watershed revealed that the main waterway showed a high occurrence rate of TC-resistant bacteria, whereas Tonle Sap Lake and the Sai Gon estuary did not. The Shannon index (H'), an indicator of ecological diversity, was calculated from denaturing gradient gel electrophoresis (DGGE) profiles, which indica...
Safe marine navigation in the Arctic is becoming more important with a growing interest in the region in recent years [1]. The United States Geological Survey (USGS) estimates there to be more than 90 billion barrels of undiscovered oil in the arctic [2]. With the summer Arctic sea ice extent having decreased by 50% since 1980 [3], this now opening waterway has given rise to serious interest in...
Dreissena polymorpha, the zebra mussel, a pestiferous mollusk from Eurasia, has spread throughout the navigable waters of the Northeastern United States since its introduction into the Great Lakes system in 1986 (Maxwell, 1992). The appearance of these organisms in the Mohawk River system was first reported in 1991 (O'Neill, 1991). By the summer of 1994 zebra mussels had successfully colonized ...
When developing a watershed plan, it is useful to consider how watersheds are configured. The term management unit is used to describe watersheds and their smaller segments. The two management units that will be focused upon in this handbook are the watershed and the subwatershed. A watershed can be defined as the land area that contributes runoff to a particular point along a waterway. A typic...
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