Razvan Orza's research while affiliated with University of Bucharest and other places

Publications (9)

Poster
Full-text available
The project had three objectives: Objective 1 To produce cost-effective tools for the evaluation of metals’ stocks and their mineralogical forms in tailing dams, Objective 2 To produce effective tools for the remediation of tailing dams, Objective 3 To develop innovative environmental services for the design of coupled monitoring systems and couple...
Conference Paper
Full-text available
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...
Article
Resistivity data collected in towns or industrial settings suffers much in data quality because of the noise introduced by the infrastructural anthropic elements. The influence of this noise is heavily felt on the inversion process, where the obtained models can be far from reality and from the other in situ information available. Based on the laye...
Chapter
Full-text available
The concept of hazard in the current interpretation of the regulations is directed to local and short term effects and its assessment is based on the distribution in space of the concentration of contaminants in abiotic and biotic compartments. We criticize this concept and introduce a potential hazard with full space-time dimension, i.e. from shor...
Conference Paper
The mining activities generate today the biggest pollution problems that the industry is facing. Zlatna mining region, Romania, was declared in the '90s the most polluted area in Europe. The primary goal of the study is to analyze the contamination in the studied area at the soil level, underground terrain, hydrological and hydrogeological systems,...
Conference Paper
For decades, the hard‐wired arrays were used for the surface waves attenuation, known as the most difficult noise seen on the land seismic data. Lately, the fine sampled single sensors tend to replace the hard‐wired arrays in data acquisition. Modeling results showed that the signal‐to‐noise ratio of the hard‐wired array response is lower than that...
Article
In the Carpathian-Pannonian region in Neogene times, westward-dipping subduction in a land-locked basin caused collision of two lithospheric blocks with the southeastern border of the European plate. Calc-alkaline and alkaline magmatism was closely related to subduction, rollback, collision and extension. Previous paleomagnetic results (e.g. Panaio...

Citations

... An alternative solution is provided by the use of single-sensor recordings. Static corrections can be applied to single-sensor records and the use of these preprocessed single-sensor records for array-forming can preserve the reflection amplitudes (Orza and Panea 2008;Panea 2009). ...
... On the other hand, roots help to prevent erosion by water and wind as well as leaching, carrying pollutants to groundwater (Carrasco et al. 2011). It is documented that the sources of metals available for wind dispersion are in general silty sand materials resulting from the separation through flotation of polymetallic ores and efflorescence salts (Jianu et al. 2012). Eapen et al. (2007) also claimed that phytostabilization is recommended in the case of tailing dams where post-flotation wastes (extremely harsh substrates for plant growth) were stored. ...