Abstract. The aim of this paper is to develop a model for pollutant concentration prediction in a stream. The developed model that determines nitrogen and phosphorus concentrations in a river is based on a dimensional analysis. Application of dimensional analysis to water quality modelling is presented, pointing out possibilities of applying this methodology in water quality research. We investigate how dimensional analysis can be applied to water quality modelling and which benefits it can bring to researchers in this area. For modelling water quality in a water stream it is essential to know the parameters that influence water quality. The relevant parameters are flow of water in the river (discharge), its catchment area, velocity of water in the stream, temperature of water, temperature of air and measured concentrations of the pollutant -nitrogen and phosphorus. A sensitivity analysis shows that the concentration of pollutant in water stream is sensitive to changes in both water and air temperatures. The model performs well when average values are used; the prediction error increases when the single concentration values are considered. The model was developed, calibrated and evaluated using measured data from the river station Ižkovce, River Laborec in eastern Slovakia.
PELIKÁN, P., ŠLEZINGR, M.: Methodology for the establishment of physical and geometric properties of a drainage basin. Acta univ. agric. et silvic. Mendel. Brun., 2011, LIX, No. 6, pp. 265-270 Factors which aff ect runoff are closely related to properties of the basin from which the water fl ows and its environment. They have an eff ect not only on the size of the runoff but also its origination and mainly its temporal distribution. These factors can be divided into two main groups. The fi rst group contains climatic factors, which are besides precipitation meteorological quantities aff ecting the overall evaporation of water in the drainage basin. These include the actual temporal and spatial progress of a rainfall, the moisture of air, evaporation, air temperature, the velocity and direction of wind, atmospheric pressure, etc. The other group consists of geographic factors of the drainage basin, which describe the environment in which the process of runoff occurs. The presented study focuses on a theoretical analysis of physical and geometric properties of a basin, the practical methods and the possible ways of their determination and possible uses of results. In the past the determination of physical a geometric watershed attributes had been working out on the basis of analogue maps. These methods were very labour-intensive and lengthy. The report deals with new determination methods based on digital data processing -utilization of digital terrain model (DTM). These problems are quite actual because of research of rainfall-runoff process, fl ood process and soil erosion within watershed. digital terrain model, drainage basin, hydrology, physical and geometric factors, rainfall-runoff process Hydrology is a science which consistently deals with natural principles of water and its cycle. Its signifi cance follows from the irreplaceable character of water for all living creatures, for life and activities of human beings. The knowledge obtained within the fi eld concerning water sources, the origination and distribution of drainage of water on and under the earth surface can be used to enhance the living conditions on the Earth. Hydrological data, which include important characteristics of the hydrological regime, serve mainly as a foundation for proposals of economical and functional water management works and for planning of potential water management interferences improving the hydrological situation.The need for and the consumption of water is still rising. However, with respect to its limited volume, it is necessary to plan the needs of a society so that water resources for various purposes are used rationally and in the optimum way. The general controlling and concept-making role is in the hands of water management. Its activity is practically impossible without good and reliable hydrological data.Engineering hydrology provides data and information necessary for design and construction activities and the operation and maintenance of water management works. Besides, it is used in all activities ai...
The main aim of this paper is to develop a model for pollutant concentration prediction in a stream. The developed model that determines nitrogen and phosphorus concentrations in a river is based on a dimensional analysis. Applications of dimensional analysis to water quality modelling are presented, pointing out possibilities of applying this methodology in water quality research. We investigate how dimensional analysis can be applied to water quality modelling and which benefits it can bring to researchers in this area. The models were developed, calibrated and evaluated using measured data from the River Laborec in eastern Slovakia
IntroductionBrno Valley Dam on the Svratka River (56.19 km) was put into operation in 1940 to decrease the damage caused by river flow during floods, to supply water to the city of Brno, and to control the flow under the dam. The area of the water reservoir is 259 ha with a total volume of 17.7 million m 3 . The banks of the reservoir in the Osada area are continuously damaged to an approximate length of 250 m, where the slope-to-vertical abrasion caverns reach heights of up to 5 m (detailed localization GPS: the banks from 49°14'44.063"N, 16°30'22.781"E to 49°14'45.298"N, 16°30'11.502"E).Pol. J. Environ. Stud. Vol. 27, No. 2 (2018), 793-799 AbstractThe Osada Recreation Area on the left bank of Brno Valley Dam (Czech Republic) represents a location that is extremely affected by the abrasion process due to a combination of adverse factors (fetch related to the dominant wind speed and direction over the water surface causing wave motion, the geological structure and morphology of banks, boat traffic). Our research focused on confirming the hypothesis that properly designed low-cost biotechnical structures can contribute to the active stabilization of a bank under special protection status. The hypothesis was verified by the method of wave train analysis (to prove wave height reduction) and spectral analysis (to prove wave energy dissipation due to breaking) of synchronized data collection of wave motion. The records of water surface motion were taken with the aid of electronic devices on the windward and leeward sides of the structure specifically assembled for the purposes of our research. Comparing the results of both sensors proved the effect of the stabilizing structure (double willow wattling) consisting in wave height and peak spectral energy density reduction. The leeward values decreased to approximately half the windward values due to the process of waves passing through the structure and energy dissipation.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.