<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">A digital elevation model (DEM) is an important part of many geoinformatic applications. For the creation of DEM, spatial data collected by geodetic measurements in the field, photogrammetric processing of aerial survey photographs, laser scanning and secondary sources (analogue maps) are used. It is very important from a user's point of view to know the vertical accuracy of a DEM. The article describes the verification of the vertical accuracy of a DEM for the region of Medzibodrožie, which was created using digital photogrammetry for the purposes of water resources management and modeling and resolving flood cases based on geodetic measurements in the field.</abstract>

Analysis of accuracy of digital elevation models created from captured data by digital photogrammetry method

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Internal corrosion has a significant effect on the useful life of pipes, the hydraulic conditions of a distribution system and the quality of the water transported. All water is corrosive under some conditions, and the level of this corrosion depends on the physical and chemical properties of the water and properties of the pipe material. Galvanic treatment is an innovation for protecting against corrosion, and this method is also suitable for removal of water stone too. This method consists of the electrogalvanic principle, which is generated by the flowing of water between a zinc anode and the cupro-alloy cover of a column. This article presents experimental corrosion tests at water resource Pernek (This water resource-well marked as HL-1 is close to the Pernek of village), where the device is operating based on this principle.</abstract>

Evaluation of annual corrosion tests for aggressive water

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Secondary clarifier is one of the most commonly used unit operations in wastewater treatment plants. It is customarily designed to achieve the separation of solids from biologically treated effluents through the clarification of biological solids and the thickening of sludge. As treatment plants receive increasingly high wastewater flows, conventional sedimentation tanks suffer from overloading problems, which result in poor performance. Modification of inlet baffles through the use of an energy dissipating inlet (EDI) was proposed to enhance the performance in the circular clarifiers at the Al-Dewanyia wastewater treatment plant. A 3-dimensional fully mass conservative clarifier model, based on modern computational fluid dynamics theory, was applied to evaluate the proposed tank modification and to estimate the maximum capacity of the existing and modified clarifiers. A Computational Fluid Dynamics (CFD) model was formulated to describe the tank is performance, and design parameters were obtained based on the experimental results. The study revealed that velocity and (suspended solids) SS is a better parameter than TS (total solids), (Biochemical Oxygen Demand) BOD, (Chemical Oxygen Demand) COD to evaluate the performance of sedimentation tanks and that the removal efficiencies of the suspended solids, biochemical oxygen demand, and chemical oxygen demand were higher in the baffle.</abstract>

Department of civil Engineering, Faculty of civil Engineering, AL-Qadisyia University, Iraq

Department of Sanitary and Environmental Engineering, Faculty of Civil Engineering, Slovak University of Technology, Radlinského 13, 813 68, Bratislava, Slovakia

Improvement performance of secondary clarifiers by a computational fluid dynamics model

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">The calibration of horizontal circles results in a set of discrete correction values. These corrections are obtained in specific circle positions chosen by the size of the calibration step. For further use it is necessary to know the correction values for any location on a horizontal circle; therefore, it is necessary to know the function of the continuous corrections of a horizontal circle. This could be achieved from the measured values by several methods. In the article two methods are presented for determining this function through the approximation of polynomial and trigonometric series.</abstract>

Processing of calibration measurements on EZB-3

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">With the computer power available an analysis of a total soil-structure system has become possible. In this paper the advantages of an analysis performed in an frequency domain is shown: the condensation to the primary degrees of freedom, thereby conserving all the characteristic properties of the system, is straightforward; material damping based on rheological models can be considered easily; and even nonlinear problems may be investigated. The formulation is developed in a total displacement formulation, where the motion is driven by forces acting at the soil-structure interface, or more generally, at so-called interaction nodes. The total displacement formulation is compared with the classical approach, where the unknowns are the relative deformations with respect to the rigid base of the structure. These unknows are produced by inertial forces acting on the masses of the structure. In the conclusion the total displacement formulation in the frequency domain is suggested for structures with embedded elastic foundation built on a sub-grade which requires extended modeling for the mechanical representation of the structure and the sub-grade.</abstract>

Department of Structural Mechanics, Faculty of Civil Engineering, Slovak University of Technology, Radlinského 13, 813 68, Bratislava, Slovakia

Visiting Professor Građevinski fakultet, Bul. Kralja Aleksandra 73, 11000 Beograd

Advantages of an analysis of soil-structure interaction in a frequency domain

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Slovak Journal of Civil Engineering

 The Slovak Journal of Civil Engineering (SJCE) is an international scientific journal published by the Faculty of Civil Engineering of The Slovak University of Technology. The SJCE aims to become a multidisciplinary forum for the presentation of original contributions and the exchange of knowledge in the broad field of civil engineering. The Journal covers topics in Architecture and Construction Engineering, Environmental Engineering, Materials Engineering, Structural Engineering, Water and Sanitary Engineering, Transportation Engineering, Surveying and Geodesy. The editors of SJCE do not wish to restrict the topics suitable for publication, but would suggest some guidelines. Submitted material should report on original work which may cover either scientific or technological developments. Interdisciplinary contributions covering the economic or environmental aspects of civil engineering are also welcomed.   The Slovak Journal of Civil Engineering aims at topics which expand the boundaries of knowledge on the interface between academic research and practical applications in the broad fields of the theory of civil engineering, design and technology sectors. By providing an international forum for the interchange of information and up-to-date issues from around the world, it aims to serve the interests and needs of civil engineering scientists, applied researchers, advanced practitioners, and professionals.   Rejection Rate    25%      All manuscripts are subject to double blind peer review by two internationally recognised experts. The journal does not have article processing charges (APCs) nor article submission charges.   Regístration number of Ministry of Culture of Slovakia : EV 47/22/EPP.   Archiving   Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.   Plagiarism Policy   The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 