The sewage water of the city of Vaasa, located at the Gulf of Bothnia, pollutes the surrounding coastal areas and beaches near the city. The sewage outlet is planned to be moved to some other place in order to decrease the harmful effects in the most valuable areas close to the city. The currents and transport processes in the area were examined in order to find the most suitable outlet locatio...

introductiondue to shortage of fresh water resources, the quality of impounded water behind the dams becomemore important than how it was previously as a source of fresh water resource. thermal regime anddissolved oxygen concentration are factors that affect the quality of water reservoirs.many lakes show vertical stratification of their water masses, at least for some extended timeperiods. the...

  This study aimed to design a bycatch reduction device (BRD) for shrimp beam trawl, which is manufactured by flexible materials to reduce bycatch for the gear in the South Sea of Korea. The model test was carried out to understand the shape of the gear in the water and to measure the variation of flow speed due to the BRD in a circulating water channel. Catches were compared between a shrimp b...

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The evolutions of practices of seismic slope stability analysis of earth embankment/dam are discussed in this paper. The basic concepts of various methods, salient features, advantages and limitations of each of them are elucidate. Methods for both stability analysis and deformation calculation are presented. Methods for calculation of deformation of post liquefaction stage are also briefed.

Tailings dams are built to safely store tailings and protect the natural environment from damage. However, dam accidents occur frequently, endangering safety of life property, causing pollution environment. Many caused by seepage. As such, this study takes No. II Ledong Baolun Gold Mine in Hainan Province as an example builds a two-dimensional finite element model simulate seepage field. The ef...

Background& objectives: Zarrinehrud River is one of the most important permanent and water-rich rivers in West Azerbaijan province located in the catchment area of Lake Urmia. In this study, to evaluate the quality of the Zarrinehrud River, with a length of 57.5 kilometers from the outlet of Noroozlou to the drainage dam to the Lake Urmia, QUAL2K computer simulation model was used. Methods: Th...

  This study aimed to design a bycatch reduction device (BRD) for shrimp beam trawl, which is manufactured by flexible materials to reduce bycatch for the gear in the South Sea of Korea. The model test was carried out to understand the shape of the gear in the water and to measure the variation of flow speed due to the BRD in a circulating water channel. Catches were compared between a shrimp b...

During 1997-2007 we studied distribution and dynamics of main radionuclides and their biological significance in lake ecosystems within the 10-km inner exclusion zone around the destroyed unit of the Chernobyl nuclear power plant. The main objects of our studies were bottom sediments, water, seston, and different species of hydrobionts from Azbuchin Lake, Dalekoye-1 Lake and Glubokoye Lake. Sel...