Daniel Scradeanu

University of Bucharest | Unibuc · Department of Geological Engineering

Seven institutional partners from four Romanian development regions joined in a consortium focused on the sustainable administration of water resources, river basins and wetlands. The goal of INTER-ASPA project is to create an innovation environment able to support over multiple strategic cycles the disciplinary, inter-disciplinary and trans-discip...

It is well known that changing the vegetation cover by bioremediation leads to changes in runoff and erosion intensity. However, this relation is not easy to be quantified. One possibility is to have direct measurements in the field using large experimental plots. The weakness of this approach is the lack of generality. At the other extreme another...

In this paper we aim to present a study based on the results obtained in the frame of Environmental Monitoring Programme (EPM) for the Romanian National Repository for Low and Intermediate Radioactive Waste (DNDR) – Baita Bihor from 1998 to 2014. EPM involves the determination of artificial radionuclides activity per unit of mass or volume of sampl...

The pollution of phreatic aquifers in urban areas is a problem which requires the development of a standard procedure in connection with the frequency and type of these events. Based on the results stemming from the direct minimum investigation of the polluted area, the paper proposes a methodology and a 3D conceptual model for a hydrostructure pol...

This paper presents a systemic assessment for abiotic components of the complex ecosystems in the year 2014; the investigated area is the Danube River from Bazias to Calarasi and its tributaries from Southern Romania rivers Jiu, Olt and Arges. A sampling and monitoring program was performed for representative control sections, whose geographic loca...

Producing large geo-referenced data sets for characterizing environmental variables is a major objective of the current national research programs. In Romania such public raw data sets are practically absent. In the framework of one past and two ongoing research projects we adopted a framework focusing the production of such data on coupled enviro...

Romania's accession to the European Union in 2007 significantly contributed to the Natura 2000 network of protected natural areas: 381 sites covering 17.89% of the country's territory of which 108 SPAs (11.89% of the area) and 273 SACs (13.21%). The Natura 2000 network in Romania is currently being expanded, while the number of sites and the bounda...

In the frame of the legislative regulations in Romania, the geological environment is defined as all geological structures from the top (topographical surface) up to the deep soil layers, the groundwater and the geological formations. It is considered that in overall geological structures from the topographic surface to a depth at which the human a...

The distributed variables required by erosion and other spatial models result either from the processing of remote sensing images or from the interpolation of variables measured in a network of sampling sites. The variables needed for bioaccumulation and dispersion models include: concentrations of heavy metals (total concentrations by different me...

One of the most important environmental issues which Romania faces as member of the European area is land management and natural resources exploitation within protected areas. A good example is the Natura 2000 ROSCI0103 Lunca Buzaului (Buzău and Brăila Counties, Romania). This protected area was established with the purpose of conserving habitats a...

Environmental decision support systems (DSS) paradigm evolves and changes as more knowledge and technology become available to the environmental community. Geographic Information Systems (GIS) can be used to extract, assess and disseminate some types of information, which are otherwise difficult to access by traditional methods. In the same time, w...

The purpose of the works is to evaluate the uncertainty of the hydrodynamic model for a multilayered geological structure, a potential trap for carbon dioxide storage. The hydrodynamic model is based on a conceptual model of the multilayered hydrostructure with three components: 1) spatial model; 2) parametric model and 3) energy model. The necess...

We performed a rational reconstruction of the relationship between biogeochemistry and the study of ecological productive systems. A structural and a functional possibility for building biogeochemical integrated models with optimal complexity have been identified. The conceptual framework was then applied to metals in contaminated areas. Metal mobi...

The paper is focused on the shallow aquifer contaminated with leaching metals from the waste dump of S.C. Neferal A.S. The slag from industrial processing of Neferal plant is disposed in direct contact with the soil, without any kind of isolation in the base. The dump is crossed by a drain with a length of several kilometers that collect the precip...

The main objective of the study is the construction of the D model of moisture distribution in unsaturated soil with complexe hydrological conditions due to irrigation works. The D model is designed to assess the water dynamics in soil and the processes of contamination of aquifers due to intensive agricultural activities. The D model is based on:...

Information on space and time distribution of moisture content in irrigated soils of cultivated land may be significant for at least the following reasons: - the availability of water for irrigation and its costs; - the variable depths where roots are developed for different types of plants; - soil salinization due to excessive irrigation works of...

The monitoring an control of the humidity distribution of unsaturated soil in time and space allow forecast of two processes, essential in the management of groundwater resources: • recharge of aquifers; • multiphase migration fluid associated with groundwater. In order to obtain a wide range of information on fluid migration in heterogeneous zones...

The geophysical investigation of soil characteristics is a matter of great actuality for agricultural, hydrogeological, geotechnical or archaeological purposes. The geophysical mapping of soil quality is subject of a recently started scientific project in Romania: "Soil investigation and monitoring techniques - modern tools for implementing the pre...

The study provides new information about the most important risks inside and surroundings area of a former uraniferous mining site (northern part of Avram Iancu mine - Romania). A D model was developed for assessing slide, flood, erosion, subsidence, groundwater contamination hazard. This model is usable for geospatial analysis, being able to provi...

The evaluation of the vulnerability of the karst aquifer and the source in the Coteţul Dobreştilor system was performed on the basis of geological, hydrogeological and pedological data. The methods proposed in the Final Report of COST Action 620 were used. The available field data resulted in assessing the parameters P, I and in characterizing the...

PROLOG De la picătura de apă " din cer " şi până la cea de la robinet (Fig. PRO.1) este un drum lung şi complicat care trece de cele mai multe ori prin structurile adânci ale Pământului. Dăruită cu energie de la Soare apa coboară în adâncuri pentru a se purifica. Vă propun, în acest prolog, un traseu Darcy cu XII niveluri de iniţiere. Acest traseu...

The main Pliocene lignite lithotypes from Oltenia (detrital coal, xylite, xylite coal, weakly xylite coal, clayey coal) were formed within various coal facies named after dominant paleophytocoenoses: the forest with Sequoia, the grassy swamp (Carex ssp.), the decidous forest swamp, the forest swamp with Glyptostrobus, the marsh with Phragmites and...

The evaluation of the impact of natural and antropogenic factors on groundwater quality within the MORENI-MAGURENI-MISLEA hydrostructure was carried out by modelling of the structure, aquifer dynamics and hydrochemistry. The connection between the structure aquifers confirmed the created model. The polluted transfer from hydrographic net to the phr...

Mining works connected with coal extraction in Oltenia have an important effect on regional aquifers, such regional dacian artesian aquifer. In the natural regime period the main flow direction in the artesian aquifer, in the zone of the huge quarry from the Oltenia (Rosia de Jiu), was north-south, with a hydraulic gradient of about 1%. As a conseq...