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The construction of a numerical hydrogeological flow model must be preceded by obtaining necessary information. Quantity and reliability of information may extensively impact on the process of model construction and its later calibration, and as a result пїЅ the quality and reliability of prognostic calculations. The article deals with sources of data required for a numerical groundwater flow model and it presents various types of data resources. The model is based on a number of overall nature materials, such as ...

This study comprehends the stability assessment of seven slopes with Pre-Cambrian rocks and located in traffic-access areas of SW Angola, one (Slope 1) is located on the road access from Lubango to Tundavala Gorge, another slope belongs to the CaholoпїЅs area near Humpata (Slope 2) and five of them (Slopes 3 to 7) are located on the LebaпїЅs Sierra, along the sinuous hair-pinned sections of the National Road 280. Slope 1 is composed by quartzites, volcanic rocks and lutites. Slope 2 shows sandstones, lutites and q...

The studied area is located in the vicinity of Rashid branch, part of the Nile Delta. This region is part of one of the most important aquifers in the world. The review of published information indicates that the existing zone of interaction between groundwater and sea salt water is complicated by the variable lithological composition in vertical and horizontal directions and by the relationship with the River Nile waters. Object of study are the upper parts of the aquifer where favorable conditions for natural sa...

Previous researches have shown the possibility of using organic-mineral additive based on glyoxal for injection strengthening of soils in roadbases and engineering communications. Saponite containing material was used as mineral component in the composition. Saponite containing material is a solid phase, extracted from the circulating water suspension of the kimberlite ore dressing. Modification of the sandy soil by the tailored organic-mineral additive content increases its specific cohesion up to 50 times. It wa...

The paper starts with the presentation of some general elements for characterizing, from morphological, geological, climatic, rainfalls and hydrographical point of view, a national road routing, highlighting the specific particularities which are concerning the study of the instability phenomena. Further on, are presented the types of instability phenomena present on the national road routing, including the general causes that produced them. The paper ends with the analysis of two case studies, considered as being...

One of the common applications of geosynthetics is their use as reinforcement for aggregate and soil layers. Geosynthetics improve the mechanical properties of the reinforced layers, which are originally, due to various reasons, insufficiently protected. Therefore, the use of geosynthetics allows for bearing heavier loads thanks to the soil-reinforcement system and an extended material durability. This article describes the laboratory tests of mechanical properties of a hexagonal geogrid made of polypropylene used...

Based on a real-life example, the report presents the methodology and the process of adapting in situ measurements from static CPTu probing for an application in a design process, using direct methods of driven pile capacity estimation. The report discusses two approaches. One of them is based on a real-life original CPTu measurement involving preliminary soil assessment while the other one is based on the initial averaging of the measurement values qc and fs. The paper provides methods of averaging cone resistanc...

The experience accumulated in Romania and worldwide by means of studies, design and control of the behaviour of many shallow foundations has rendered evident the existence of some soils, such as the loessial soils and the plastic clay fills, which are characterized by a high deformability, due to their sensitivity at wetting. One of the defining feature of these soils is their пїЅcontractancyпїЅ under the simultaneous action of compression and shear stresses. The macroporous soils, such as the loessial soils, have...

This paper aims to analyse the link between the hydraulic structures and the watercourse riverbed. In this regard the Epurasu branch has been chosen as a case study area. This is a secondary branch of the Lower Danube, located between the 341-334 kilometers of the Danube River. Epurasu branch is in an advanced state of silting/colmation, possibly due to the unfinished damming works, from the mid-80s of the last century. Thus, over the years, various solutions have been proposed to ensure the longitudinal connectiv...

This article shows the results obtained by applying a study method of the convergence of structural models, for the particular case of a structural model from the geotechnical domain. For this purpose, is used the study method of the structural models convergence, already widely used in the field of research and CAD - CAE design. For a larger relevance and utility is presented the convergence study of a structural model for a ground section to which it applies a uniform load. The problem of ground compaction is so...

This paperwork aims to present the correlation between the Modulus of Deformation, E as a physical parameter and the internal friction angle of the soil, ? as a resisting parameter of soils. Assigning the resisting parameters to soils shall be reliable and when there is a suspicion in their values derived out of a test, than they shall be compared with other tests used to determine the shear resistance. To give the correlation between the Modulus of Deformation, E and the internal friction angle, ? the results obt...

In the paper the results of the study of the crack resistance of circular shaped fiber reinforced concrete tunnel linings are presented. On the basis of laboratory testing of linings and numerical simulation of their behavior (FEM) is shown that the deformation of fiber concrete can be considered as the deformation of solid, elastic, homogeneous medium. In addition, the analysis of stressпїЅstrain state of these linings shows that their failure is caused by stable propagation of the single crack, which usually for...

A variety of failures occurs due to excessive seepage through the dam body during the design, construction and maintenance of earth dams. It happens because of various reasons: unsuitable dam location at construction site, unsuitable soil composition, interruption of construction technology, etc. Timely noticing of the reasons of seepage phenomena, monitoring and evaluation processes dangerous for structure, prediction of seepage path and the possible consequences for structure, protective measures against undesir...

Nowadays, renewable resources come to the forefront in the production of electricity. Among the most important resources belong the utilization of hydropower potential of water courses. The construction of hydraulic structures should not have a negative impact on the groundwater level regime of the surrounding environment. In the article, we focused on the selected small hydropower plant on the Hron River. There was built an effective monitoring system to track changes in groundwater level regime during its constr...

This article presents results of the physicochemical simulation of the water-rock system equilibrium and discusses a saturation degree of calcium chloride brines in the Oleniok cryoartesian basin. The analyses show that the chloride brines with salinity of 54пїЅ57 g/L are in the equilibrium (or quasi-equilibrium) state relative to the main sedimentary rock-forming minerals, but the strong brines (salinity above 300 g/L) are undersaturated relative to these minerals (calcite, dolomite, magnesite, strontianite, anhy...

Studied groundwater pasture arrays, the estimation of forages stock based on the analysis of simultaneous satellite and field work on the mowing of vegetation on key sites recommended measures to increase the efficiency of pastoral transhumance. Used domestic methods of evaluation of natural annually renewable resource fresh and slightly saltish underground water of active water exchange zone of the pasture lands and the conditions of irrigation of pastures of Kyzylorda region; application of remote sensing techni...

Groundwater constitutes the largest reservoir of freshwater in the world, representing more than 97% of all freshwater reserves available worldwide (excluding glaciers and ice caps). The remaining 3% is composed mainly of surface water (lakes, rivers, wetlands) and soil moisture. Until recently, attention for groundwater referred mainly to its use as drinking water (eg approx. 75% of people in the European Union depend on groundwater for water supply), but also it was recognized that they are an important resource...

According to the requirements of Council Directive 98/83/EC of 3 November 1998 on the quality of water intended for human consumption and Regulation of the Minister of Health of 13 November 2015 on the quality of water intended for human consumption, drinking water should be characterized by the appropriate concentration of selected parameters, i.e. heavy metals. The specified parametric values should not be exceeded not only in water treatment plant, but also on the particular parts of the production cycle and wa...

Determination of the threats arising from the vibrations generated by geotechnical works, like sheet pile or pile driving, often requires special monitoring of buildings located in the area of vibration. Monitoring allows distinguishing the vibrations affecting the structures from vibrations clearly perceptible by humans, but not strongly affecting the building. In some limited cases, dynamic analysis enables for designing an active generator, reducing dynamic impact of foundation works. The article presents the p...

International Seismological Centre (ISC, Newbury, UK) annually locates about 30,000 earthquakes that may occur with macro-seismic effects (effects on people, objects, nature and buildings). Catalog of the earthquakes, observed since 1034, contains informationпїЅs about more than 650 earthquakes that have macro-seismic effects in the SlovakпїЅs territory. The strongest earthquake was recorded 28.06.1763 with the epicenter near of KomпїЅrno and only in the town itself completely destroyed the seven churches and 279 ...

In the classification of natural disasters and hazards that occur all over the world, landslides are in the fifth place, both as far as number of casualties and material losses. Landslides are processes that lead to natural disasters or technical failures, the consequences of which threaten life, health and property of people. Continuous monitoring and evaluation of the risk seems to be a very important issue in preventing effects of this natural disasters. This paper therefore discuss the causes of landslides wit...

Kakanj is located in the center of Sarajevo-Zenica basin in Bosnia and Herzegovina. Coal mining began in the mid 19th century. Several underground mines in the area of Trstionica started operating after the end of World War II. Subsidence caused by underground mining are almost always localized on the surface above the underground area with a zone of influence within the area of the mine. Vertical subsidence could cause significant problems and economic losses, but also the positive effects on the environment, as ...

This paper describes possibilities to use numerical models as significant aid in proposal of slope stabilization in Quarry. More accurately the proposal for excavation way of first soil overburden cut, which is mixed up with rock mass, to stabilize the slope. That is real case study which was performed for greywacke quarry situated in Eastern Bohemia. Since 2005 a small instability symptoms are observed on eastern general slope of quarry. Based on this fact the slope stability investigation started in detail one y...

Carbonate eluvium is suffusion unstable soil, where voids and cavities can be formed. This can lead to adverse effects and disasters in the constructions of buildings and structures. This article presents the results of using the Plaxis Software for the determination of the critical depth and critical diameter of the cavities in which the possible collapse. The total thickness of the carbonate eluvium exceeds twenty meters in the study area. The calculation model of the cavity growth included the geometric model o...

FREEWAT Platform is a free open-source tool for water resource management created within the frame of HORIZON 2020 project FREE and open source software tools for WATer resource management, financed by the EU Commission. The projectпїЅs Consortium is constituted by partners from various water sectors from 10 EU countries, plus Turkey and Ukraine and large stakeholdersпїЅ involvement is thought to guarantee results in its dissemination and exploitation. The FREEWAT platform is an integrated modelling environment fo...

Twenty years after finishing the dam ?unovo on river Danube about 15 km beneath Bratislava were after regular controls gradually exclude from system some observation boreholes. There were realised new investigation boreholes. The main reason of these boreholes was verification of the soil characteristics in depth where the periodical changing of water in Danube and in reservoir had negative influence on the permeability characteristics. One of the most important factors of safety is filtration stability of granula...

In this paper, a case study of vinyl sheet pile application under the historical Sakarya Bridge on Sakarya River is studied. The main challenge of the project was the height of the application site. The design length of the piles were 10 m and the height of the bridge where the application was going to be made under; was 7,5 meters. In addition, gabions are present under the bridge ambutment and Provincal Authority of Historic Monuments expect no damage around the bridge. The soil of the site were well-degraded sa...