We present a conceptual model for the character of 11.6 cal. ka BP drainage Baltic Ice Lake in outlet area based on new geomorphological map as well sedimentological information. combine this information with review previous work well-studied area. The includes premise remnant ice Lången valley suggested by workers and indicates began subglacially. Cobbly sediment northeast Billingen formerly i...

The Shinnecock Inlet on the south shore of Long Island, New York, has experienced chronical erosion at down-drift beaches which require periodic nourishment to stabilize local shoreline. potential sand borrow site is selected outside inlet with minimum impact natural bypass process inlet. Supported by US Army Corps Engineers (USACE) District, a numerical sediment transport modeling study presen...

Nowadays deep excavations are needed for construction of foundation of high rise buildings, providing space for parking and etc. In some cases deep excavations may be constructed in the vicinity of the subway tunnels and causes unpredicted extra displacements and internal forces in tunnel lining of tunnels which were not designed for them and consequently affect serviceability of tunnel. Theref...

Vitamin B1, or thiamin, can limit primary productivity in marine environments, however the major marine environmental sources of this essential coenzyme remain largely unknown. Vitamin B1 can only be produced by organisms that possess its complete synthesis pathway, while other organisms meet their cellular B1 quota by scavenging the coenzyme from exogenous sources. Due to high bacterial cell d...

The estimated diffusion fluxes of methane (CH4) and carbon dioxide (CO2) at the sediment-water interface in the Rzeszów Reservoir in southeastern Poland are presented. The relevant studies were conducted during 2009, 2010, and 2011. Calculated fluxes ranged from 0.01 to 2.19 mmol m-2 day-1 and from 0.36 to 45.33 mmol m-2 day-1 for methane and carbon dioxide, respectively. While the values for c...

Pond aquaculture is the major freshwater aquaculture method in China. Ammonia-oxidizing communities inhabiting pond sediments play an important role in controlling culture water quality. However, the distribution and activities of ammonia-oxidizing microbial communities along sediment profiles are poorly understood in this specific environment. Vertical variations in the abundance, transcriptio...

Ecosystem uptake and transfer processes of Sellafield-derived radiocarbon (14C) within the Irish Sea were examined. Highly variable activities in sediment, seawater and biota indicate complex 14C dispersal and uptake dynamics. All east basin biota exhibited 14C enrichments above ambient background while most west basin biota had 14C activities close to background, although four organisms includ...

Sedimentation is one of the main eco-morphological and technological challenges associated with reservoirs. not only reduces functional capacity a reservoir by filling it, but also changes downstream sediment dynamics habitat availability for aquatic biota. Additionally, dams hinder free bi-directional fish passage, emerging as major threat to species migratory fish. In past decades, mitigation...

the effect of underground cavities in site seismic response was studied over the subway tunnels that are under construction in the city of karaj, using ambient noise measurements as well as numerical modeling. the idea for this research comes from the observation of differences in experimental site transfer function, calculated on more than 100 locations of the city, for the areas near the unde...