نتایج جستجو برای: beach profile
تعداد نتایج: 229564 فیلتر نتایج به سال:
We measured the flux of water through a beach at the head of Catalina Harbor, California, by monitoring the water table in a transect of wells perpendicular to the shoreline. During a 24-h period, the volume of sediments filled and drained, the tidal wedge, was 7.4 m3 (m shoreline)21, and the flux of water pumped across the beach face was 1.0 6 0.3 m3 d21 (m shoreline)21. 222Rn concentrations m...
Aiming at improving present understanding on longshore sediment transport (LST), the U.S. Army Engineer Research and Development Center recently established a Large-scale Sediment Transport Facility (LSTF). The 3dimensional movable-bed facility has the capability of simulating wave conditions that are directly comparable to annual averages along many low energy coasts. Wave, current, and sedime...
AIMS Research into the relationship between pathogens, faecal indicator microbes and environmental factors in beach sand has been limited, yet vital to the understanding of the microbial relationship between sand and the water column and to the improvement of criteria for better human health protection at beaches. The objectives of this study were to evaluate the presence and distribution of pa...
Beach seine gear is one of the prominent fishing gears in Nile Perch fishery. Before Nile Perch was introduced to the lake, beach seines the species targeted with beach seine were Tilapia, Bagrus, Haplochromis, Protopterus and Labeo. In 1994, beach seines were banned in Tanzania and by 2004, this particular regulation and others, were harmonized and applied to the entire Lake as a result of imp...
Broad sandy beaches and extensive dune ridges dominate the Dutch coastal zone. The beach areas are subject to continuous processes as beach erosion and sedimentation, which influence its morphology. This in turn has an economic impact on beach management and public security. Beach nourishments are carried out if safety of the land is at risk. Here the problems are defined as: (1) how to localiz...
Many recreational beaches suffer from elevated levels of microorganisms, resulting in beach advisories and closures due to lack of compliance with Environmental Protection Agency guidelines. We conducted the first statewide beach water quality assessment by analyzing decadal records of fecal indicator bacteria (enterococci and fecal coliform) levels at 262 Florida beaches. The objectives were t...
Beach nourishment represents a type of coastal defense intervention, keeping the beach as natural system. Altering cross-shore profile geometry, due to introduction new sediments, induces non-equilibrium situation regarding local wave dynamics. This work aims increase our knowledge concerning 3D movable bed physical modeling and impacts on hydrodynamics, sediment transport, morphodynamics. A se...
BACKGROUND Although the safety and effectiveness of the short-axis in-plane method has been confirmed for lumbar plexus block, the operation is difficult and has a high rate of epidural spread at the plane of the articular process. Therefore, we developed a new in-plane technique, called the beach chair method, which displays images from the transverse process. We compared the operative difficu...
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Determining the effects of unpredictable disturbances on dynamic ecological systems is challenged by the paucity of appropriate temporal and spatial coverage of data. On 27 February 2010, an 8.8 Mw mega-earthquake and tsunami struck central Chile and caused coastal land-level changes, massive damage to coastal infrastructure, and widespread mortality of coastal organisms. Wave-exposed sandy bea...
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