Browsing by Author "Bejan, Iurie"

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APRECIEREA GEOLOGICĂ A BAZINULUI HIDROGRAFIC PRUT
(CEP USM, 2009) Chirică, Lazăr; Bejan, Iurie; Ţîțu, Pavel
In the geological structure of the basin of the Prut river there are units of orogen and units of platform. The crystalline foundation in the north is at depth of a few hundreds, but in the south at depth of 4500 m. The sedimentary blanket is differently formed of Paleozoic rocks – Neozoic.
ASPECTE GENERALE ALE REGIMULUI HIDROLOGIC ALE APELOR DE SUPRAFAȚĂ ÎN PARCUL NAȚIONAL ORHEI
(CEP USM, 2024) Angheluța, Viorica; Bejan, Iurie; Bunduc, Tatiana; Jechiu, Iradion; Boaghe, Dionisie
This study is oriented towards the analysis, evaluation and appreciation of the hydrological regime of the surface waters in the Orhei national Park. The hydrographic network of Orhei national Park is well developed, comprising 124 rivers and streams with a total length of 257.5 km. The two main hydrographic basins include the Moța, right tributary of the Răut and Teleșeuca, left tributary of the Ichel river, along with the upper and middle course of the Vatici river, right tributary of the Răut. Most of the rivers in the area have lengths between 1 and 10 km and only 6 have lengths greater than 10 km. The assessment of water resources is based on the data from the Jeloboc hydrological station, in operation since 1958, part of the monitoring network of the state Hydrometeorological service. The average annual ﬂow of the Răut River in this sector is 10.44 m3/s in the period 1958-2010, with a slight decrease in the ﬂow. There are 26 water reservoirs in the Orhei national Park, most of which are small, man-made ponds, built for various purposes, such as river ﬂow regulation, ﬂood protection, fsh farming and others.
CARACTERIZAREA FACTORULUI EDAFIC ÎN CARE VEGETEAZĂ SPECIILE FORESTIERE DIN CADRUL ENTITĂȚII SILVICE STRĂȘENI
(CEP USM, 2024) Grati, Vladislav; Bejan, Iurie; Nagacevschi, Tatiana; Bunduc, Tatiana
Articolul reprezintă un studiu comparativ al condițiilor de vegetație (aspecte geomorfologice, soluri) pentru zona centrală a Republicii Moldova numită și „Codrii centrali”. Secetele prelungite impun un mod diferit de gestionare a silviculturii. Prin acest studiu ne propunem să identificăm comparativ condițiile edafice din 1985 și 2021, modul în care acestea au evoluat, dar și capacitatea arborilor de a se acomoda în timp. Solurile forestiere din Republica Moldova au fost mai puțin studiate, cu excepția celor din centrul Republicii Moldova (Ursu, 2005), în special ariile protejate, fiind incluse în traseele cercetărilor științifice.
COMPOZIȚIA ARBORETELOR DIN CODRII STRĂȘENILOR COMPARATIV CU POTENȚIALUL PRODUCTIV AL TERENULUI
(CEP USM, 2024) Grati, Vladislav; Bejan, Iurie; Grati, Sabina
În prezentul articol este studiată compoziția arboretelor pe specii și coresponderea acestora potențialului productiv oferit în condițiile din zona centrală a Republicii Moldova amplasat în raionul Strășeni în raza Întreprinderii de Stat „Strășeni”. Anume aici, în centrul republicii s-au păstrat cele mai valoroase arborete naturale, în care mai este prezentă în proporții optime specia principală de bază gorunul, fiind urmat de stejarul pedunculat. Abaterea compozițiilor actuale de la cele optime este rezultatul gestionării defectuoase a pădurilor în trecut, iar stabilirea cu exactitate a motivului devierii de la compozițiile optime va asigura realizarea comparațiilor și în funcție de condițiile climatice. Structura pe specii a volumului, în special a gorunului, reflectă capacitatea speciei de a valorifica condițiile naturale ale teritoriului în care este situat.
INVESTIGAȚII RECENTE PRIVIND STAREA RADIAȚIEI DE FOND ÎN ECOSISTEMUL URBAN BĂLȚI, REPUBLICA MOLDOVA
(CEP USM, 2024) Stegărescu, Vasile; Ţugulea, Andrian; Bulimaga, Constantin; Bejan, Iurie
This material reflects the study of the external gamma radiological fund level and the content of natural and man-made radionuclides in the soils of the Balti urban ecosystem in the Republic of Moldova. Radiometric and radiospectrometric research revealed values of the level of the external gamma dose rate as well as the content of anthropogenic and natural radionuclides (137Cs, 226Ra, 232Th, 40K) that do not exceed the provisions of the national norms (NFRP-2000). There is still a need to continuously monitor the level of the external gamma radiological background and the content of radionuclides of different origins in the soil and spontaneous flora, resulting from global deposits from nuclear tests and accidents, including from the Chernobyl NPP.
SPATIAL STUDY OF SOIL EROSION IN THE REPUBLIC OF MOLDOVA
(2022) Bejan, Iurie; Sochircă, Vitalie; Nagacevschi, Tatiana; Țîțu, Pavel
The study represents a detailed spatial analysis regarding soil erosion in the Republic of Moldova. The territory of the country (including the Transnistrian region), from the point of view of the administrative-territorial structure, is made up of 983 units. Thus, the analysis of eroded lands was carried out on administrative units at the level of villages, communes and cities, according to the data of the 2021 year from the Land Cadastre, developed by the Agency for Land Relations and Cadastre of the Republic of Moldova. The created database was later imported into a GIS (Geographical Information Systems) program and processed using ArcGIS software. The mapping and classification of the data regarding the proportion of eroded agricultural land (total; strongly, moderately and weakly eroded) allowed the identification of the most vulnerable areas to these processes - the Central Moldavian Plateau (Codrilor), the Ciuluc Hills, the Dniester Plateau etc. The frequency rate of agricultural land in total per country was 73.7%, including arable land constituted 54.9%. Of the entire agricultural area, 73.2% was monitored from the point of view of soil and geomorphological processes: approximately 1/3 of all agricultural land is affected by some degree of erosion, including 4.5% that are heavily eroded. The specific factors of soil erosion and the main consequences are evaluated, with an emphasis on the most affected regions.
UNELE ASPECTE PRIVIND POPULAŢIA URBANĂ DIN BAZINUL r. PRUT
(CEP USM, 2009) Bejan, Iurie
The towns of the basin of the Prut river reprezent a new tampon region between Republic of Moldova and the European Union. From the hierarchical point of view, the towns of that region can be classifi ed in 4 groups: Less then 5 thousands ihabitants (Costeşti, Corneşti, Iargara) 5-10 thousands inhabitants (Lipcani, Briceni, Ocniţa, Cupcini, Cantemir) 10-20 thousands inhabitants (Edineţ, Glodeni, Făleşti, Nisporeni, Leova)  More then 20 thousands inhabitants (Ungheni, Cahul)
UNELE ASPECTE PRIVIND REŢEAUA DE AŞEZĂRI URBANE DIN BAZINUL r. PRUT
(CEP USM, 2009) Chirică, Lazăr; Bejan, Iurie
The towns of the basin of the Prut river reprezent a new tampon region between Republic of Moldova and European Union. From the hierarchical point of view, the towns of that region can be classifi ed in 4 groups: Less then 5 thousands ihabitants (Costeşti, Corneşti, Iargara) 5-10 thousands inhabitants (Lipcani, Briceni, Ocniţa, Cupcini, Cantemir) 10-20 thousands inhabitants (Edineţ, Glodeni, Făleşti, Nisporeni, Leova)  More then 20 thousands inhabitants (Ungheni, Cahul)