Ecoterra, no. 35, pp. 1-7, 2013
Colegiul Naţional „George Bariţiu” Cluj-Napoca, România
Due to the geomorphological and hydrographical aspects of Bârgău Mountains, they have known a long and extensive anthropization process. The main vectors for this process were the four rivers (Ilva, Leşu, Bârgău and Bistriţa) and also the interrivers areas, which were included in the settlements spaces. Thus, there are two habitable areas: of Ilva and Leşu in northern part and Bârgău and Bistriţa in southern part. For each group of settlements, the significant aspects concerning the ancientness and toponimy of the constituent localities were chosen. For the localities from the Ilva and Leşu valleys, their presentation has been done from upstream to downstream, as for the localities from Bârgău and Bistriţa valleys - from downstream to upstream.
Ecoterra, no. 35, pp. 8-14, 2013
Boglárka-Mercedesz Kis, Călin Baciu
Faculty of Environmental Science and Engineering, University Babeş-Bolyai Cluj-Napoca, Romania
The Eastern Carpathians are renowned for their mineral water resources, exploited since long time for their therapeutic value. In the present paper we summarize the chemical findings of a research carried out on 104 mineral water spring in the Eastern Carpathians. Two major types of waters (Ca-Na-HCO3 and Na-Cl) were identified based on the analysis of the major ions. The overlapping chemical features give birth to the mixed type of waters found in the southern part of the Eastern Carpathians. All of the waters are associated to bubbling gases of CO2, CH4 or H2S. The chemistry of mineral waters is highly influenced by the type of rocks they are leaching. Considering this aspect the mineral waters from the Eastern Carpathians are mainly influenced by the Neogene to Quaternary volcanic rocks of the Călimani-Gurghiu-Harghita Mountains, the sedimentary deposits of the Transylvanian Basin and the flysch deposits of the Carpathian arc.
Ecoterra, no. 35, pp. 15-24, 2013
Petrică D. Toma
S.C. Apa Nova Bucureşti S.A.
In this paper is presented the mathematical model and simulation of the processes taking place in a digester effluent for urban type based on kinetic equations describing these processes and developed using Scilab-Xcos program. So you can see how it evolves over time the concentration of organic substrate (S1), the total concentration of AGV (volatile fatty acids) (S2), acidogenic bacteria concentration (X1), methanogenic bacteria concentration (X2), the total concentration of inorganic carbon (C), total alkalinity (Z), gas flow (qM), CO2 flow (qC) and the pH of the solution in a digester.
Ecoterra, no. 35, pp. 25-28, 2013
Petrică D. Toma
S.C. Apa Nova Bucureşti S.A.
In this paper is presented the mathematical model of the evolution of the concentrations of two chemicals in the water to a tributary of a small lake and simulate their time evolution with program developed in Scilab-Xcos. Also in this work is presented a simulation example.
Ecoterra, no. 35, pp. 29-36, 2013
Cristina Rusu, Claudiu Gavriloaie
Colegiul Tehnic INFOEL Bistriţa, România
Natura 2000 represents a protected areas network, designated at from European level. Its aim is the preservation of the wild habitats and of endangered vegetal and animal species, as the proper management of these areas. The network has the present name from 1992. Within the network, the species and their habitats are destined to be preserved through a durable administration and a peaceful cohabitation human-nature.
Ecoterra, no. 35, pp. 37-53, 2013
Sana Ehsan, Shafaqat Ali, Shamaila Noureen, Mujahid Farid, Muhammad B. Shakoor, Afifa Aslam, Saima A. Bharwana, Hafiz M. Tauqeer
Department of Environmental Sciences, Government College University, Faisalabad, Pakistan
This study was conducted to investigate heavy metals content of sewage water and its impact on soil and their uptake by vegetables irrigated by the sewage/industrial effluent. Twenty five samples each of water, soil, and vegetable leaves and edible vegetable portions were collected from different sites, in Lahore city of Pakistan. Parameters like pH, and electrical conductivity (EC) were also determined The results indicated that soil irrigated by sewage water having tolerable DTPA-extractable metals contents, The concentration of heavy metals in upper layer of soil (0-15 cm) is higher than the lower layer (15-30 cm). The reason behind is that the upper layer was receiving sewage water permanently while the penetration of sewage water below 15 cm was less. The heavy metal content was above the toxicity level in leafy vegetables grown in the area of Lahore. This study showed that among the different tested plant species, the amount of heavy metals was higher in leaves than fruits. Plants whose fruits grow below the soil showed higher concentration of heavy metals while other showed less concentration whose edible portion was above the ground level. While leafy vegetables (Spinach, Cabbage, Coriander etc) showed higher concentration in leaves than in fruits, indicating that these vegetables should be consumed carefully if produced using the polluted water.