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Tsvetan Kotsev

3 linked publication records

Author: Tsvetan Kotsevclear all
Showing 1-3 of 3 records
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SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Ecology, Economics, Education and Legislation
Publication

RELATIONSHIP BETWEEN LANDFORMS AND HEAVY METAL CONTENTS IN THE SOIL OF THE OSTROVSKA LOWLAND ALONG LOWER DANUBE

(STEF92 Technology, 2021-12-20, Velimira Stoyanova, Tsvetan Kotsev)

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This study aimed to reveal the dependence of the spatial distribution of heavy metals in soil on the morphography of the Lower Danube floodplain in the Ostrovska Lowland in Bulgaria. The field campaign was conducted in 2017, and the concentration of Zn, Ni, Pb and Cr were measured in the fine fraction (<0.063 mm) of 10 soil samples using X-ray fluorescence analysis. The average content of Cr in the topsoil (0-20 cm) was 127 mg/kg ranging between 98 – 171 mg/kg. It was followed by Zn – 81 mg/kg (60 – 128 mg/kg), Ni...

Ecology and Environmental Protection2021
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Informatics, Geoinformatics and Remote Sensing
Publication

APPLYING UAV PHOTOGRAMMETRY DATA FOR HIGH-RESOLUTION GEOMORPHOLOGICAL MAPPING OF A PART OF THE LOM RIVER VALLEY NEAR THE VILLAGE OF VASILOVTSI (BULGARIA)

(STEF92 Technology, 2020-09-20, Emilia Tcherkezova, Tsvetan Kotsev, Georgi Zhelezov, Velimira Stoyanova)

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Floodplains are complex systems which include a wide number of socio-economic activities like agriculture, freshwater fisheries, electricity from power plants and others. They have often highly dynamic property, due to the alternation of fluvial processes, floods, and ongoing sediment transport, as well as of environmental specifics and natural or anthropogenic processes. In the context of the investigation of soil pollution with heavy metals in the riverine floodplains, the availability of geomorphological maps a...

Photogrammetry and Remote Sensing2020
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Informatics, Geoinformatics and Remote Sensing
Publication

LAND COVER CHANGES IN THE OGOSTA VALLEY FOR THE PERIOD 1993-2019

(STEF92 Technology, 2020-09-20, Velimira Stoyanova, Tsvetan Kotsev, Emilia Tcherkezova, Georgi Zhelezov, Nelly Koleva)

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The current research aims to present land cover changes for the period 1993-2019 in the arsenic-contaminated Ogosta River valley in the context of the contaminant dispersal in the soils of the river floodplain caused by the agricultural practices and land use. The investigation is conducted for two test sites situated in the upper and lower stretch of the valley near the villages of Gorna Kovatchitsa and Mihaylovo, respectively. The changes are established for the fourth level of the CORINE Land Cover nomenclature...

Photogrammetry and Remote Sensing2020
Showing 1-3 of 3 records
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