DSpace at VGTU: Recent submissions
Dabar rodomi įrašai 41-60 iš 52974
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Assessment of the impact of anthropogenic activities on the flow of the river Vilnia basin
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)River flow is one of the most important links of the water circulation in the nature which describes general water yield and potential water resources of a river basin. Since the range of the flow change is best illustrated ... -
Modelling the impact of small hydropower dam on sediment retention in the river Virvyte
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)The hydroelectric power plants (HPP) are a valuable source of renewable energy; however they negatively impact the environmental conditions in the river. The paper presents investigation of the ways to coordinate these ... -
Hydraulic criteria and estimation of the hydropower plant (HPP) operation impact on the river environment
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)Interaction between a river and its environment is crucial, and negative impact of a HPP operation on the environment must be estimated. In order to be able to evaluate this impact, hydraulic parameters such as velocity, ... -
Sediment and nutrient retention in reservoirs of small hydro-power plants
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)Dams segment river channels into dammed and undammed reaches causing both changes in the integrity of free-flow conditions and disturbance of the hydrological regime including downstream transport of both sus pended sediments ... -
Effect of disintegration pretreatment of sewage sludge for enhanced anaerobic digestion
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)A sludge disintegration technology, presented in this paper, consists of pretreatment of the sludge before its anaerobic digestion. Disintegration of sludge has been recently incorporated into the wastewater treatment ... -
Application of FT-IR for characterization of biomass isolated from surface and drinking water with high concentration of natural organic matter
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)Fourier Transform Infrared (FTIR) spectroscopy for identification of bacteria in raw and drinking water samples in which the biomass before the analyses was concentrated from about 0.4 m3 of water with crossflow ultrafiltration ... -
Flood frequency analysis of Lithuanian rivers
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)Numerous hydrological data derived from water measurement stations enables us to perform direct statistical analysis of river runoff characteristics. Recently Lithuanian hydrologists pay great attention to analysis of ... -
Modelling of water supply system for the prospective factory of Coca-Cola company, Latvia
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)A hydrogeological model (HM) has been created for checking sustainability of the water supply system of the prospective factory of the CocaCola Company. The Groundwater Vistas system was used, to run HM. HM covers the 9 ... -
Impact of land drainage and natural factors on the changes of the hydrological regime of the Tatula river
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)Impact of the land drainage on the river catchment in Lithuania has so far been evaluated as of rather mixed character as the impact is rather complex and multifaceted. When drainage systems are installed, the hydrographic ... -
Impact of anthropogenic activities on river water quality in the region of Lielupė river basin district
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)The article analyses sources of point and scattered pollution and their change, also change of runoff and biogenic substances in the rivers Mūša, Lėvuo, Tatula and Nemunėlis, located in a particularly sensitive karst region ... -
Changes of drainage run-off hydrological regime in glacial lacustrine clays of the karst zone
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)Long-term data (1976 to 1999 and 2009) on the hydrological regime change of the drainage situated in glacial lacustrine clay loam on clay in the North Lithuanian karst zone are presented in the article. Study data shows ... -
Risk management methods in hot water distribution systems to negate health risks from microbiological contamination
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)Water distribution systems are exposed to a number of risks, i.e. hazards and hazardous events that may result in bad drinking water quality. Microbiological contamination due to e.g. source water contamination, insufficient ... -
Influence of slurry on organic matter fluctuation in groundwater
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)The paper analyses the data on the change of the groundwater organic matter content in the observed boreholes, equiped in light soils fertilized with the slurry from pig-breeding enterprise. The investigations aimed to ... -
The trends of drainage runoff change in loam soils during a multiyear period
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)The article presents the influence of fluctuation of the main climatic factors over time on drainage runoff, the analysis of drainage runoff distribution in the course of a year. For the preparation of the present paper ... -
Seasonal changes of phosphorus concentrations in lime filter drainage water
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)The drainage outflow may be identified as the leading source of water quality in agricultural regions. Phosphorus concentrations above background levels increase the risk of eutrophication in water bodies. Various technologies ... -
Efficiency of petroleum products removal from aqueous mixtures with different sorbent materials
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)The aim of this paper was to investigate the performance parameters and efficiency of different sorbent materials (FIBROIL® and DUCK) for oil removal from aqueous mixtures and natural surface runoff water in dynamic mode. ... -
The research of deformation processes in regulated streams
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)Different kinds of deformation occur in the most regulated rivers and stream channels. That courses the changes of stream channels in cross-sectional and longitudinal profiles. Regulated streams banks overgrow with dense ... -
The impact of rural settlements on water quality in small rivers and drainage channels
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)According to the requirements of the EU Water Framework Directive 2000/60/EC, good water quality in all EU countries should have been achieved by 2015. One of the most important environmental problems is river pollution ... -
The influence of lithological structure on river runoff in the South-Eastern Lithuanian hydrologic area
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)Due to the recently increasing frequency of extreme changes in river runoff regime, scientific literature deals with the characteristics of runoff formation. Works are carried out in analyzing climate changes and a lot of ... -
Evaluation method of groundwater qualitative and quantitative fluctuations in the small river cathments of urbanized territories
(8th International Conference “Environmental Engineering” (ICEE-2011), 2011)Preservation of groundwater resources and improvement of its quality are the main environmental problems of urbanized territories. The increasing levels of pollution reduce the number of surface water basins suitable for ...