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Volume XXII |
Geomorphology

Major and minor elements contribution to discriminate between karst drainage watersheds and to outline underground hydrological connections. An example from Sohodol Valley (Vâlcan Mountains, Romania)

1,, 2, 1, 1, 3, 4, 1, 3, 5, 2, 3, 4

Abstract: Water samples for chemical analyses have been collected from impenetrable karst springs and from water flows intercepted by caves within the area of Sohodol valley. The analyzed inorganic constituents were noticed to belong to two distinct categories. One category included solutes of variable concentrations, likely related to local allochtonous inputs (Al, NO3) and to local occurrences of decaying organic matter (PO4, NO3), such solutes being hence irrelevant in terms of regional patterns of rock weathering. The other category of solutes (Ca, Mg, Na, K, Sr, Ba, Rb, Fe, HCO3 and SiO2) proved to have concentrations that did not differ between two interconnected water flows (e.g., impenetrable karst springs that discharged from a common water body; a cave stream connected to an impenetrable karst spring). Accordingly, the concentrations of this second group of constituents represented reliable chemical fingerprints of a particular karst watershed. And implicitly, water flows having contrasting concentrations of such solutes were conjectured to belong to distinct karst watersheds, which likely differed in terms of chemical composition of the karstifiable rocks, and/or of the impervious rocks which provided allochtonous recharge to the concerned karst drainage systems.

Keywords: , , , ,
Full article 10.5775/fg.2023.2.3602Dates:
Received: 08-10-2023 Accepted: 15-12-2023 Printed: 30-12-2023 Online: 19-02-2024
Affiliations:
  • 1 "Emil Racoviță" Institute of Speleology, Romanian Academy, 13 Calea 13 Septembrie, 050711 Bucharest, Romania
  • 2 “Sabba S. Ştefănescu” Institute of Geodynamics, Romanian Academy, 19-21 J.L. Calderon, 020032 Bucharest, Romania
  • 3 Independent caver, Bucharest, Romania
  • 4 Silex Brașov Caving Club, 39 Ştefan Baciu, 500170 Brașov, Romania
  • 5 Vulcan Craiova Caving Club, 41 Henri Coandă, Craiova, Romania
Corresponding author:
  • marius.vlaicu@iser.ro
Author contributions: Conceptualization, H.M., N.C., M.V., G.C., C.N., A.C.M.; methodology, N.C., H.M., C.M., M.V., G.C., C.N., A.T., A.C.M., M.P., L.N., M.C., E.S.; formal analysis, N.C., H.M., C.M., G.C., A.T., A.C.M., L.N., M.V.; investigation, N.C., H.M., G.C., A.C.M., M.V.; writing – original draft preparation, H.M., N.C., M.V., G.C., A.C.M., L.N.; writing – review and editing H.M., N.C., M.V. All authors have read and agreed to the published version of the manuscript.Declaration of interests: The authors declare no conflict of interest.
Citation:
APA 6 | Harvard 2008 | Turabian 6 | MLA 7
RIS | BibTeX
Funding: This research received no external funding.Acknowledgements: The valuable support provided by Agata Teodorescu and Mircea Vlădulescu during field operations, as well as the dedicated assistance of Floarea Răducă in the laboratory work are kindly acknowledged.
Copyright: © 2024 The Author(s). Published by Forum geografic.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Volume XX |
Geomorphology

Combining geomorphological approach and thermal monitoring for permafrost research in Rodna Mountains, Northern Romanian Carpathians

1,, 2, 3, 4, 4

Abstract: This paper aim to investigate the possibility of permafrost occurrence in the alpine area of Rodna Mountains by describing the rock glaciers distribution and characteristics and by monitoring the ground surface temperature and spring water temperature during late summer. Rock glaciers have a rather scarce distribution between 1670 and 1960 m a.s.l., their morphology is completely relict even at the highest altitudes which indicate they are inherited landforms. Thermal regime indicates improbable permafrost at Bila talus slope (1844 m a.s.l.) and an ambiguous outcome at Curmătura Buhăescului talus slope (1980 m a.s.l.) where average temperature during the BTS period was warmer than the -2°C threshold only in one year of the two monitored. Alpine spring water temperatures are above 3°C indicating absence of permafrost and they are moderately correlated with altitude. Iezeru Pietrosu cirque headwall is affected only by seasonal frost at 2100 m a.s.l. for almost 9 months. It seems that in Rodna Mountains the past and present climate conditions were and are milder in comparison to Southern Carpathians as the latitude increase does not compensate the lower altitudes.

Keywords: , , , , ,
Full article 10.5775/fg.2021.071.dDates:
Received: 19-09-2021 Accepted: 06-11-2021 Printed: 30-12-2021 Online: 14-02-2022
Affiliations:
  • 1 University of Bucharest, Faculty of Geography, Bucharest, Romania and University of Bucharest Research Institute, Bucharest
  • 2 Department of Geography, Ștefan cel Mare University, Suceava
  • 3 Emil Racoviță Institute of Speleology, Romanian Academy, Bucharest
  • 4 University of Bucharest, Faculty of Geography, Bucharest, Romania
Corresponding author:
  • razvan.popescu@geo.unibuc.ro
Citation:
APA 6 | Harvard 2008 | Turabian 6 | MLA 7
RIS | BibTeX
Acknowledgements: We acknowledge and appreciate the support of GEODAR research group from the University of Bucharest Research Institute led by Dr. Alfred Vespremeanu-Stroe that supplied us with the research instruments.
Copyright: © 2022 The Author(s). Published by Forum geografic.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Volume XI |
Geomorphology

Morphometric features of the river network from the Bârlad catchment

1, 1, 1,

Abstract: After a brief presentation of the Bârlad catchment, the hydrographic network is analyzed using the Horton-Strahler classification system. From the amount of morphometric parameters, the drainage and the slope patterns are taken into consideration for the entire Bârlad catchment and for the 13 hydrometric stations in the catchment that have data on water flows and suspended sediments. From those there were chosen the Vaslui hydrometric station as representative for the geomorphologic units of the Bârlad catchment and the Feldioara hydrometric station for the Berheci catchment. Based on the analyzed patterns there were determined a series of morphometric parameters specific to the river network for all the 13 analyzed stations and from their comparison one can see obvious differences between the obtained values for the basins in the Central Moldavian Plateau and the ones in the Tutovei Hills.

Keywords: , ,
Full article 10.5775/fg.2067-4635.2012.040.iDates:
Received: 01-09-2011 Accepted: 02-09-2011 Printed: 01-06-2012 Online: 29-07-2012
Affiliations:
  • 1 Spiru Haret University, Faculty of Geography, Bucharest
Corresponding author:
  • crucerunick@yahoo.com
Citation:
APA 6 | Harvard 2008 | Turabian 6 | MLA 7
RIS | BibTeX
Acknowledgements: This work was supported by CNCSIS –UEFISCSU, project number PNII – IDEI 631/2008
Copyright: © 2012 The Author(s). Published by Forum geografic.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Volume IX |
Geomorphology

The Dynamics of the Present Processes within the Sărăţel Catchment Area

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Abstract: The Sărăţel catchment displays a territory mostly located in the molasse area of the Buzău Subcarpathians. The physical-geographical characteristics, as well as the social-human impact, created a complete geomorphologic system, in which the present geomorphologic processes register accentuated dynamics. Starting with the year 2002 until 2008 there were monitored areas with significant impact on the landscape, among the most important processes under study being the landslides, the torrents, the ravines and the creep.

Keywords: , , , ,
Full article Dates:
Printed: 01-11-2010 Online: 21-11-2010
Affiliations:
  • 1 Faculty of Geography, Spiru Haret University, Bucharest
Corresponding author:
  • crucerunik@yahoo.com
  • herisanu@gmail.com
Citation:
APA 6 | Harvard 2008 | Turabian 6 | MLA 7
RIS | BibTeX
Acknowledgements: This work was supported by CNCSIS – UEFISCSU, project number PNII – IDEI 631/2008.
Copyright: © 2010 The Author(s). Published by Forum geografic.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.
Volume VIII |
Hydrology

Classification Systems for the Hydrographical Network

1, 1, 1,

Abstract: The paper discusses the main systems of classification and codification starting from the mainstream to the smallest tributaries and the other way round, from the smallest tributaries to the mainstream systems. A new drainage basin coding system is developed based on the Horton-Strahler principles of classification. The new system is supposed to be useful both for scientific research and the management of water resources.

Keywords: ,
Full article Dates:
Printed: 30-11-2009 Online: 10-12-2009
Affiliations:
  • 1 Spiru Haret University, Bucharest, Romania
Corresponding author:
  • crucerunick@yahoo.com
Citation:
APA 6 | Harvard 2008 | Turabian 6 | MLA 7
RIS | BibTeX
Copyright: © 2009 The Author(s). Published by Forum geografic.
Provided under the Creative Commons Attribution-NonCommercial-NoDerivatives License.
Open Access article.

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