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Romania has realized that potential risks arising from anthropogenic activities with a possible significant impact on human health, soil quality, groundwater and surface water. Therefore concerns for soil protection, sustainable use of its conservation and restoration capacity where possible / necessary to its fulfillment as many functions show a significant upward trend. In the process of harmonizing national policies with the European Union policies and transposing and implementing EU rules and regulations, the ...

Qanats (or karez) are ancient, sub-horizontal, underground water tunnels that have served over centuries as main water-supply systems in arid and semi-arid regions, in particular the Middle East and North Africa. In today?s fragile contexts, water scarcity plays an important role in these regions. Quantitative hydrogeological analyses, such as groundwater maps, are needed for water management plans and sustainable development. As part of a knowledge exchange program and with the participation of young Afghan refug...

The widespread use of fertilizers and pesticides impairs the state of the environment. Identifying the nature of the influence of fertilizers and pesticides on natural waters and identifying the extent of this influence is relevant today. The article discusses the influence of mineral and organic fertilizers on the qualitative characteristics of groundwater (waters of the first aquifer from the surface) in the Predvolzhsky region of the Republic of Tatarstan. Hydrogeochemical and agrochemical data help assess this...

The industrial objectives in which petroleum products are extracted (oil drillings, separating parks, compressor stations, deposits, transport pipelines) are sources of pollution for the soil and groundwater in the area. The specific pollutants in drilling, exploitation and separation of oil and gas for soil, subsoil and aquifer are: petroleum, pond water, detritus and drilling mud. [1] Starting from the fact that the activity in the area of ?icleni - Romania is an activity of exploiting petroleum products, which ...

Radon is dissolved in ground water and can be transported from the source with water into the buildings. Subsequently indoors, when water is exposed to air, radon is released. Showers and sprays are a prime release method and the greater the water usage, the greater potential radon problem may occur. Outdoors, radon is quickly diluted to very low, not problematic concentrations but indoors, it can concentrate significantly. Although radon in indoor air is indicated as the second leading cause of lung cancer, not e...

In the hydrological area of Banat from Romania, 20 bodies of underground water were identified and delimited, out of which 5 are cross-border underground water bodies. The present paper characterizes the underground water bodies in the B?rzava catchment area, which has an area of 1202 km2, with an average altitude of 289 m. The B?rzava catchment area occupies the central part of the Banat catchment area, bordering the north and east with the Timi? catchment area, to the south with the Nera catchment area and to th...

Temporary condition of water resources in the world, the prospects for their security of countries are a matter concern. The world situation with water resource is clearly not satisfactory and remains disturbing in general. In many regions there is co-quantitative depletion of water resources, their deficit becomes increasingly stressful. It is given the modern availability of fresh water in Europe. Russia occupies a leading position according to the total volume of freshwater. However, it is experienced a signifi...

Geological structures be of great control groundwater flow and accumulation of groundwater, and should therefore be taken into account in studies related to groundwater studies. This study attempts to investigate the impact of geological structures on groundwater flow and groundwater quality in Al Jaaw Plain, United Arab Emirates. A set of thematic maps derived from digital elevation model (DEM), Landsat images, and ALOSPLAS SAR images were enhanced by applying Sobel filter with 10% threshold and equalization enha...

Magnetic nanoparticles (MNPs) of iron oxides are increasingly used in many laboratory and medical applications such as hyperthermia, magnetic resonance imaging or magnetic drug delivery. Popular in medical applications are magnetite (Fe3O4) and maghenite (?-Fe2O3) nanoparticles. They have gained a great interest because of their low toxicity, biocompatibility, simple separation methodology, and low cost of production. A novel magnetic hydrogel adsorbent based on gellan gum and Fe3O4 (GG/Fe3O4) was synthesized and ...

The monitoring data of groundwater quality in a vast area in north central Bulgaria indicates concentration of hexavalent chromium above the maximum contaminant level set in Directive 98/83/EO. Hexavalent chromium contamination of the groundwater is of a great concern, since this groundwater is the main drinking water source for more than 25 small villages in the region. Field tests were conducted in order to determine the mineral and chemical composition of soils and rocks near four of the villages. Exploratory d...

Carbonate reservoirs are important exploration targets from the perspective of hydrocarbon and, also, groundwater reserves. In this respect, the most important aquifer system in Romania is located in South Dobrogea region, comprising two distinct aquifer complexes: a deeper one, mostly under pressure, hosted in fractured/fissured and karstified limestones and dolomites of Late Jurassic - Early Cretaceous age and a shallower one, mostly unconfined, hosted in Sarmatian (late Middle Miocene) lumachellic and oolitic l...

This article summarizes the findings of extensive hydrogeological mapping that has taken place over the past few years. The area of the CSA mine is situated at the northern edge in the central part of the Most Basin (North Bohemia, The Czech Republic). The area of interest is divided into several hydrogeological units, which are characterized by mutually different main determinants such as morphology, lithological characterization of the main types of rocks, tectonic violation. These are the following units: the c...

Water resources, particularly the phreatic ones, are exposed to a high risk of nitrates pollution. This pollution appears mostly in rural areas, due to improper use of fertilizers, improper waste storage or local sources of infestation, like animal sheds, and so on. Recent researches have indicated that clay can be used for groundwater decontamination. Mass transport between the unsaturated and saturated zones greatly influences subsurface processes. The transition zone between the vadose zone and the saturated zo...

One of the most important sources of potable water throughout the world is the ground water, which is currently under stress due to human activities and consumption. Therefore, the presence and transport of contaminants in the groundwater represents an important threat to the human health and the environment. Many studies dealing with the groundwater quality and its sustainable use are found in the literature. Latest research shows a great opportunity of removing groundwater contaminants by using clay. Thus, an ex...

Kazakhstan is located in the arid zone in the conditions of water supply deficit. Irrigated cropping is the basis of agriculture for its southern regions. Akdalinsky irrigated massif (Almaty region, Kazakhstan) belongs to rice irrigation systems. Their exploitation causes the salinization and contamination of soils and groundwater. Mathematical modeling is the most effective method of solving hydrogeological problems associated with anthropogenic environmental impact. It is advisable to create permanent mathematic...

The Dobrudzha Coal Deposit is characterized by complex geological, tectonic and hydrogeological conditions. The formed aquifers and complexes, on the one hand, hinder the possible exploitation of the coal deposit, on the other hand they are important for drinking water supply in the area. The aim of the present study is to develop a 3D hydrodynamic model in the area of the deposit to elucidate the dynamics of the flow processes, the hydraulic connections between the different hydrogeological units and the possibil...

One of the main contaminants in groundwater of South Russia is nitrate and being one of the essential problems of water providing system needs a solution. It was in 1981 when World Organization of Health pointed on necessity nitrate studying soil and water. Estimation of nitrate contamination in groundwater, used in housekeeping, of Rostov region was held. Results give an opportunity to find out and estimate tendency of changing quantity of contaminant in groundwater and can be regarded as foundation for further e...

The article discusses the features of formation and distribution of groundwater in the north-western slope of the Moscow artesian basin in the European part of Russia. Location of the north-western slope area is based on ecological-hydrogeological zoning. The aim of the case study is to examine the anthropogenic impact on groundwater resources and quality for two main aquifer systems of the Moscow artesian basin: Gdov aquifer and Intermorainal aquifer system. The investigation based on analysis of groundwater moni...

Oil and gas exploration in Bulgaria has been mainly conducted in Northern Bulgaria. Up to 2500 boreholes have been drilled on the territory of the country so far with a depth of several hundred meters to more than 6000 m. During drilling, groundwater with different hydrochemical properties, often with high total dissolved solids (TDS) and contents of a number of elements, have been registered. After the completion of the drillings, many of them have not been liquidated, as in some of the boreholes artesian water o...

Open cast coal mining is inevitably accompanied by a significant technological interference in the environment. This requires the due (during the technological process) restoration of the disrupted balance and the forming of a new environment consistent with the ecological requirements. Environment protection is one of the priority tasks for Mini Maritsa Iztok EAD. The environment protection legislation in force is strictly observed at the Company. The use of water to support mining operations, and waste water rep...