<abstract xmlns="http://www.w3.org/1999/xhtml"> Relining is one of the best alternatives available today for pipe system rehabilitation. This trenchless solution is particularly interesting for urban agglomerations, as a smaller diameter pipe is pushed or pulled through the old pipeline. Relining creates a leak-tight “pipe within a pipe” system, which is as good as new in both structural and hydraulic terms. Relining can be performed with both circular and special, non-circular (NC) profiles. The latter is especially advantageous for the rehabilitation of old sewers, many of which were constructed in a variety of ovoid-like shapes. This paper presents the typical steps that are performed for pipeline rehabilitation with non-circular profiles, as well as an applied case study (a project implemented in the city of Würzburg in Germany).</abstract>

Relining of pipe systems: conditions, benefits and application through case-study

<abstract xmlns="http://www.w3.org/1999/xhtml"> On ecosystems, the radioactive material can have several consequences: the mechanisms of self-regulation of biocoenosis are affected; the interactions and composition of flora and fauna in biocoenosis are modified etc., and on humans, radioactive material presents a major risk through external exposure and internal exposure to radiation. On the other hand, floods and droughts, among others, can have the effect that they can act as a support for radionuclides. The existence of risks of radioactive and chemical pollution on the lower course of the Danube, in the Black Sea Danube spill area as well as in the Black Sea coastal area, where a number of complex processes occur, determined the study of the radiochemical processes taking place in these areas. The paper addresses the following issues: radiation risk and nuclear risk, general hydrological characteristics, radioactivity of the Lower Danube water and coastal zone of the Black Sea, radioactivity of the Lower Danube sediments and coastal zone of the Black Sea, modeling of radiochemical processes.</abstract>

Radioactivity of the lower sector of Danube River and the Black Sea coastal zone in relation to some hydrological characteristics

<abstract xmlns="http://www.w3.org/1999/xhtml">Abstract In order to implement Directive 2014/89/EU of the European Parliament and of the Council establishing a framework for Maritime Spatial Planning, Romania and Bulgaria are carrying out the “Maritime Spatial Planning for the Black Sea - the Romanian - Bulgarian cross-border area” project (MARSPLAN-BS). The impact of the implementation of the Maritime Spatial Planning (MSP) project on the Black Sea coast on the development of the coastal area requires an analysis that is carried out by the authors in this paper.</abstract>

The impact of maritime spatial planning on the development of the Black Sea

<abstract xmlns="http://www.w3.org/1999/xhtml"> For a long time in economic theory and practice, regulation is only linked to the need for state intervention in monopolistic markets, by developing uniform, simple regulatory rules to limit and control the monopoly power, the monopoly price, mergers and acquisitions between companies in the same industry and others. In recent years the prevailing opinion that government regulation is particularly necessary in oligopolistic markets where there are several leading, dominant companies that can influence the price, quantity and quality of the product offered. However, this regulatory policy should not apply to common rules and taking into account the specifics of the market/industry, market structure (concentration level) of the various market segments and the relevant economic activity. The aim of the study: 1) Evaluation of the efficiency of the construction market, 2) Demonstrate the need for government intervention, 3) Guidelines for the implementation of the regulatory function of the government.</abstract>

Efficiency of the construction market and need for government regulation

<abstract xmlns="http://www.w3.org/1999/xhtml"> Usually, the possibility of product differentiation of the construction company is defined as restricted, limited. Product differentiation as a key element of product policy aims to create a sustainable competitive advantage in the minds of consumers, using tangible and intangible characteristics and product properties compared to the next strongest competitor. The ability of any company to differentiate their own product makes it distinct from competitors and gives the opportunity to control the market and build competitive advantages. The aim of the study is to prove: 1) The need to differentiate the product of the construction company, 2) Guidelines for differentiation of the construction product taking into accounts the specifics of the construction market, product and process.</abstract>

Product differentiation policy of the construction firm

<abstract xmlns="http://www.w3.org/1999/xhtml"> Romania, has declared, by the Governmental Decision nr.352/2005, all its territory as a sensitive area. This implies that, for all urban agglomerations larger than 10.000 population equivalent waste water treatment plants (WWTP) with nutrient removal must be built or upgraded. This paper presents the results regarding the possible environmental impacts expected from the project for construction of waste water treatment plant in the City of Vaslui, with main focus on surface water. This research study includes assessment methodology, project description regarding the rehabilitation and extension of the Vaslui waste water treatment plant, data related to water resources, impact assessment on water and appropriate mitigation measures. The assessment of the impacts has been performed for the construction and operational phase of the wastewater treatment plant. The construction phase was subdivided into several phases, while in the operational phase the impacts are analyzed following the line for treatment of the wastewater and effluent production, the line for sludge production and drying process, sludge disposal in safety conditions considering the provisions of 86/278/EEC Directive and the line for biogas utilization.</abstract>

Reabilitation of a wastewater treatment plant – possible environment impact

<abstract xmlns="http://www.w3.org/1999/xhtml"> Roofs with one or more slopes, represent an important part of a construction, having a double role: a role of resistance together with the entire constructive system and a protective role both for the other components of the constructive system and for the optimal unfolding of the various functions. The durability and the fulfillment of the mechanical requirements depend equally on the material used, design quality and execution quality. Industrialized roof structures can be a solution, under the current conditions, to meet these requirements. This article compares the traditional roof structures and the industrialized one.</abstract>

Roof structures. Comparisons between traditional roof structures and industrialized ones

<abstract xmlns="http://www.w3.org/1999/xhtml"> The main goal of this paper is to establish the thermal comfort or thermal discomfort conditions for the coastal zone of Black Sea, in Dobrogea region (Romania). In the last century there have been many efforts to assess the degree of thermal discomfort and heat stress for different types of climates and taking into account as many climate variables. The thermal discomfort is difficult to be quantified because it is necessary to consider a range of environmental and human factors to decide what makes a person to feel thermal comfortable. This article is divided into three sections. First section presents the indices used in determining thermal discomfort, in the second section are presented: the main climatic characteristics of the Dobrogea region and the data and methods used in determining thermal discomfort indices. Section three is dedicated to results and discussion.</abstract>

Application of thermal discomfort indices for the coastal zone of Black Sea, in Dobrogea Region

<abstract xmlns="http://www.w3.org/1999/xhtml"> In recent years, climate conditions has caused extreme hydrological phenomena like flash floods that lead to significant material losses and impact on the environment in Dobrogea Region, Romania. In this context the needs for an integrated and sustainable approach to flash flood risk management even in small drainage basins are necessary, in order to reduce the the potential damages of flash floods in the future. In this study the hydraulic models Hec-Ras and HecGeo-Ras were used in order to simulate the behaviour of the environment at the pressure of the flashfloods in a small drainage basin. The results were validated using the measurements undertaken after the flash-flood event recorded in October, 13th, 2015 as well as the data provided by the Corbu gauging station along time.</abstract>

Flash floods simulation in a small drainage basin using HEC-RAS hydraulic model

Volume 23 (2021): Issue 1 (December 2021)

Volume 22 (2020): Issue 1 (December 2020)

Volume 21 (2019): Issue 1 (December 2019)

Volume 20 (2018): Issue 1 (December 2018)

Volume 19 (2017): Issue 1 (December 2017)

Ovidius University Annals of Constanta - Series Civil Engineering

 “Ovidius” University Annals of Constanta - Series CIVIL ENGINEERING (OUACSCE) is an international, multidisciplinary forum for the publication of original contributions and the exchange of knowledge and experience on the technical engineering areas.  OUACSCE journal publishes original papers within the broad field of civil engineering which includes, but is not limited to, the following: Construction Materials and Technology, Computational Methods in Civil Engineering, Structural Engineering, Seismic Engineering, Hydraulics and Fluid Mechanics, Hydraulic Structures, Irrigation and Drainage, Water Supply, Sewage System, Hydrology and Hydrogeology, Environment Protection, Coastal Engineering, Waterway and Ports, Geotechnical Engineering, Management in Civil Engineering, GIS Applications.  Rejection Rate:   20%   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. 