Rupar, Veljko

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  • Rupar, Veljko (3)
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Author's Bibliography

The influence of rainfall factors on soil resistance to erosion

Živanović, Nikola; Rončević, Vukašin; Ferreira, Carla; Kašanin-Grubin, Milica; Ćorluka, Stevan; Rupar, Veljko; Čebašek, Vladimir

(EGU General Assembly, 2024)

TY  - CONF
AU  - Živanović, Nikola
AU  - Rončević, Vukašin
AU  - Ferreira, Carla
AU  - Kašanin-Grubin, Milica
AU  - Ćorluka, Stevan
AU  - Rupar, Veljko
AU  - Čebašek, Vladimir
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7524
AB  - For the purposes of researching the influence of rainfall factors on soil shear strength, i.e. soil
erosion resistance, research was conducted on plots measuring 1.0x0.3 m at a slope of 15°, with
equally prepared soil. It’s been carried out 12 rainfall simulations with different values of rainfall
factors (rainfall intensity and drops diameter). These simulations were carried out with a modified
rain simulator with sprayers by Živanović et. al (2021). The analysis of the uniformity of the
prepared soil, as well as the examination of the influence of simulated rainfall factors on soil
erosion, was carried out by measuring with a pocket vane tester (Eijkelkamp M1.14.10.E). The
measurement was carried out at 30 regularly spaced locations on every plot, immediately after the
simulation was completed. Also, the measurement was carried out after 24 hours in three places
(upper, middle and lower third of the plot). Spatial distribution of measured values was assessed
by Christians' coefficient of uniformity CU. The measured shear strength values of the prepared
soil range from 2.1 to 6.9 kN/m2. The shear strength values immediately after the simulation range
from 0.4 to 5.4 kN/m2, while after 24 hours they range from 2.4 to 8.1 kN/m2. The CU values of the
prepared soil range from 68% to 81% (average 75%). Immediately after the simulation, Cu values
range from 73% to 83%, while after 24 hours, from 69% to 91%. In general, there is a clear trend of
decreasing values measured with the pocket vane tester from the top to the bottom of the plots.
Also, the influence of the change in soil moisture on the values of soil shear strength was
observed. The change in rainfall factors affects the change in soil resistance to erosion.
PB  - EGU General Assembly
C3  - EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024
T1  - The influence of rainfall factors on soil resistance to erosion
SP  - EGU24-1137
DO  - 10.5194/egusphere-egu24-1137
ER  - 
@conference{
author = "Živanović, Nikola and Rončević, Vukašin and Ferreira, Carla and Kašanin-Grubin, Milica and Ćorluka, Stevan and Rupar, Veljko and Čebašek, Vladimir",
year = "2024",
abstract = "For the purposes of researching the influence of rainfall factors on soil shear strength, i.e. soil
erosion resistance, research was conducted on plots measuring 1.0x0.3 m at a slope of 15°, with
equally prepared soil. It’s been carried out 12 rainfall simulations with different values of rainfall
factors (rainfall intensity and drops diameter). These simulations were carried out with a modified
rain simulator with sprayers by Živanović et. al (2021). The analysis of the uniformity of the
prepared soil, as well as the examination of the influence of simulated rainfall factors on soil
erosion, was carried out by measuring with a pocket vane tester (Eijkelkamp M1.14.10.E). The
measurement was carried out at 30 regularly spaced locations on every plot, immediately after the
simulation was completed. Also, the measurement was carried out after 24 hours in three places
(upper, middle and lower third of the plot). Spatial distribution of measured values was assessed
by Christians' coefficient of uniformity CU. The measured shear strength values of the prepared
soil range from 2.1 to 6.9 kN/m2. The shear strength values immediately after the simulation range
from 0.4 to 5.4 kN/m2, while after 24 hours they range from 2.4 to 8.1 kN/m2. The CU values of the
prepared soil range from 68% to 81% (average 75%). Immediately after the simulation, Cu values
range from 73% to 83%, while after 24 hours, from 69% to 91%. In general, there is a clear trend of
decreasing values measured with the pocket vane tester from the top to the bottom of the plots.
Also, the influence of the change in soil moisture on the values of soil shear strength was
observed. The change in rainfall factors affects the change in soil resistance to erosion.",
publisher = "EGU General Assembly",
journal = "EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024",
title = "The influence of rainfall factors on soil resistance to erosion",
pages = "EGU24-1137",
doi = "10.5194/egusphere-egu24-1137"
}
Živanović, N., Rončević, V., Ferreira, C., Kašanin-Grubin, M., Ćorluka, S., Rupar, V.,& Čebašek, V.. (2024). The influence of rainfall factors on soil resistance to erosion. in EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024
EGU General Assembly., EGU24-1137.
https://doi.org/10.5194/egusphere-egu24-1137
Živanović N, Rončević V, Ferreira C, Kašanin-Grubin M, Ćorluka S, Rupar V, Čebašek V. The influence of rainfall factors on soil resistance to erosion. in EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024. 2024;:EGU24-1137.
doi:10.5194/egusphere-egu24-1137 .
Živanović, Nikola, Rončević, Vukašin, Ferreira, Carla, Kašanin-Grubin, Milica, Ćorluka, Stevan, Rupar, Veljko, Čebašek, Vladimir, "The influence of rainfall factors on soil resistance to erosion" in EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024 (2024):EGU24-1137,
https://doi.org/10.5194/egusphere-egu24-1137 . .

Comparison of the physical properties of soils on transverse profiles along the gullies

Živanović, Nikola; Rončević, Vukašin; Ćorluka, Stevan; Čebašek, Vladimir; Rupar, Veljko

(Council of Scientific Societies of the Czech Republic, 2023)

TY  - CONF
AU  - Živanović, Nikola
AU  - Rončević, Vukašin
AU  - Ćorluka, Stevan
AU  - Čebašek, Vladimir
AU  - Rupar, Veljko
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6947
AB  - Natural processes and anthropogenic activity threaten soil as a resource.
Soil degradation is a global problem intensifi ed by climate change, population
growth and economic development. Soil erosion is one of the
most prevalent forms of degradation in Serbia. Soil resistance to erosive
processes largely depends on the soil‘s physical properties. Erosion processes
aff ect changes in the physical characteristics of the soil. Therefore,
the hypothesis is established: There is a diff erence between the physical
parameters of soil aff ected by erosion processes and soil on which there
are no visible indicators of the action of these processes.The investigated
area is located in the southern, hilly part of Belgrade, in a degraded
forest area vegetated by Hungarian and Turkey oak (Quercetum frainetto
– cerris). Intensive landslide and gully erosion processes aff ect this area.
The mechanism of occurrence of the erosion process is piping-erosion.
Thirteen transverse profi les were selected on gullies where soil sampling
was performed. Sampling was performed on each profi le in the gully
bed, in the left and right banks at two fi xed depths, zone 1, depth 5–10
cm and zone 2, depth of 10–25 cm. Laboratory analyses included tests
of volume weight, specifi c weight, soil particle size distribution, consistent
states and humidity. Parameters porosity and clay activity were also
analysed. Soil sampling and laboratory testing were done in accordance
with SRPS.U.B1 geotechnical testing standards. The comparison of the obtained results was made between the banks and the gully bed, as well
as between the zones using tests: t-test of mean values; W (Mann-Whitney;
Wilcoxon) – median test. Hypothesis testing was performed with a
signifi cance threshold p of 95.0 %. Testing was conducted in the statistical
analysis program Statgraphics centurion XVIII (StatPoint Technologies, Inc.
2019). Comparison of soil parameters in zone 1 had shown a statistically
signifi cant diff erence for percentage of clay and sand, liquid limit, humidity
and clay activity. Results of conducted comparison showed that in
the zone 2, a statistically signifi cant diff erence found for the parameter
percentage of clay and sand, between banks and gully bed soil samples.
While no signifi cant statistical diff erence found for the other parameters.
Analysing the results between zones, a signifi cant statistical diff erence
was found for the gully bed, left and right banks soil samples for the
parameters volume weight (dry and humid) and porosity while for gully
samples there was signifi cant statistical diff erence for liquid limit, plastic
limit, humidity and clay activity. Comparing all samples of the zones 1 and
2, a signifi cant statistical diff erence was found for the parameters volume
weight (dry and humid), porosity, percentage of sand particles, plastic
limit and current humidity.
PB  - Council of Scientific Societies of the Czech Republic
C3  - The 5th WASWAC World Conference - Adaptation strategies for soil and water conservation in a changing world, Proceedings, 19th–23rd June 2023, Olomouc, Czech Republic
T1  - Comparison of the physical properties of soils on transverse profiles along the gullies
SP  - 28
EP  - 29
UR  - https://hdl.handle.net/21.15107/rcub_cer_6947
ER  - 
@conference{
author = "Živanović, Nikola and Rončević, Vukašin and Ćorluka, Stevan and Čebašek, Vladimir and Rupar, Veljko",
year = "2023",
abstract = "Natural processes and anthropogenic activity threaten soil as a resource.
Soil degradation is a global problem intensifi ed by climate change, population
growth and economic development. Soil erosion is one of the
most prevalent forms of degradation in Serbia. Soil resistance to erosive
processes largely depends on the soil‘s physical properties. Erosion processes
aff ect changes in the physical characteristics of the soil. Therefore,
the hypothesis is established: There is a diff erence between the physical
parameters of soil aff ected by erosion processes and soil on which there
are no visible indicators of the action of these processes.The investigated
area is located in the southern, hilly part of Belgrade, in a degraded
forest area vegetated by Hungarian and Turkey oak (Quercetum frainetto
– cerris). Intensive landslide and gully erosion processes aff ect this area.
The mechanism of occurrence of the erosion process is piping-erosion.
Thirteen transverse profi les were selected on gullies where soil sampling
was performed. Sampling was performed on each profi le in the gully
bed, in the left and right banks at two fi xed depths, zone 1, depth 5–10
cm and zone 2, depth of 10–25 cm. Laboratory analyses included tests
of volume weight, specifi c weight, soil particle size distribution, consistent
states and humidity. Parameters porosity and clay activity were also
analysed. Soil sampling and laboratory testing were done in accordance
with SRPS.U.B1 geotechnical testing standards. The comparison of the obtained results was made between the banks and the gully bed, as well
as between the zones using tests: t-test of mean values; W (Mann-Whitney;
Wilcoxon) – median test. Hypothesis testing was performed with a
signifi cance threshold p of 95.0 %. Testing was conducted in the statistical
analysis program Statgraphics centurion XVIII (StatPoint Technologies, Inc.
2019). Comparison of soil parameters in zone 1 had shown a statistically
signifi cant diff erence for percentage of clay and sand, liquid limit, humidity
and clay activity. Results of conducted comparison showed that in
the zone 2, a statistically signifi cant diff erence found for the parameter
percentage of clay and sand, between banks and gully bed soil samples.
While no signifi cant statistical diff erence found for the other parameters.
Analysing the results between zones, a signifi cant statistical diff erence
was found for the gully bed, left and right banks soil samples for the
parameters volume weight (dry and humid) and porosity while for gully
samples there was signifi cant statistical diff erence for liquid limit, plastic
limit, humidity and clay activity. Comparing all samples of the zones 1 and
2, a signifi cant statistical diff erence was found for the parameters volume
weight (dry and humid), porosity, percentage of sand particles, plastic
limit and current humidity.",
publisher = "Council of Scientific Societies of the Czech Republic",
journal = "The 5th WASWAC World Conference - Adaptation strategies for soil and water conservation in a changing world, Proceedings, 19th–23rd June 2023, Olomouc, Czech Republic",
title = "Comparison of the physical properties of soils on transverse profiles along the gullies",
pages = "28-29",
url = "https://hdl.handle.net/21.15107/rcub_cer_6947"
}
Živanović, N., Rončević, V., Ćorluka, S., Čebašek, V.,& Rupar, V.. (2023). Comparison of the physical properties of soils on transverse profiles along the gullies. in The 5th WASWAC World Conference - Adaptation strategies for soil and water conservation in a changing world, Proceedings, 19th–23rd June 2023, Olomouc, Czech Republic
Council of Scientific Societies of the Czech Republic., 28-29.
https://hdl.handle.net/21.15107/rcub_cer_6947
Živanović N, Rončević V, Ćorluka S, Čebašek V, Rupar V. Comparison of the physical properties of soils on transverse profiles along the gullies. in The 5th WASWAC World Conference - Adaptation strategies for soil and water conservation in a changing world, Proceedings, 19th–23rd June 2023, Olomouc, Czech Republic. 2023;:28-29.
https://hdl.handle.net/21.15107/rcub_cer_6947 .
Živanović, Nikola, Rončević, Vukašin, Ćorluka, Stevan, Čebašek, Vladimir, Rupar, Veljko, "Comparison of the physical properties of soils on transverse profiles along the gullies" in The 5th WASWAC World Conference - Adaptation strategies for soil and water conservation in a changing world, Proceedings, 19th–23rd June 2023, Olomouc, Czech Republic (2023):28-29,
https://hdl.handle.net/21.15107/rcub_cer_6947 .

Могућност примене приручних апарата за одређивања отпорности земљишта на ерозионе процесе шумских екосистема

Živanović, Nikola; Rončević, Vukašin; Čebašek, Vladimir; Rupar, Veljko; Ćorluka, Stevan; Polovina, Siniša

(Скопје, Р. С. Македонија : Друштво за геотехника на Македонија / Skopje, R. N. Macedonia : Macedonian association for geotechnics, 2022)

TY  - CONF
AU  - Živanović, Nikola
AU  - Rončević, Vukašin
AU  - Čebašek, Vladimir
AU  - Rupar, Veljko
AU  - Ćorluka, Stevan
AU  - Polovina, Siniša
PY  - 2022
UR  - https://mag.net.mk/v-mag-symposium-28-30-5-2020/
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6514
AB  - Soil erosion is the most prevalent form of soil degradation both in the world and in Serbia. Degraded forest ecosystems do not provide sufficient soil protection and often large areas are affected by erosion processes. Shear stress plays an important role in assessing soil resistance to erosion processes. The investigated area is located in the southwestern part of Belgrade, whose areas under the forest are exposed to intense erosion processes. The entire surface is crisscrossed by gullies and shallow landslides. 13 profiles on gullies were selected, where soil resistance was measured with hand-held devices at three points along the profile (left bank, gully, right bank) and two depths each. Handy devices were chosen for field measurements: pocket wing probe (Eijkelkamp model M1.14.10.E) and pocket (hand) static penetrometer (Eijkelkamp model M1.06.03.E). The paper presents mechanical parameters measured with hand-held devices with a range of values of soil shear strength τ = 11.58 – 172.42 kN∙m-2 and pin penetration resistance R = 159.36 – 441.30 kN∙m-2. A statistical dependence was established between the values obtained by wing probe and penetrometer measurements, with a correlation coefficient of r = 0.65 and a determination coefficient of r2 = 0.42. The established differences in the values of soil resistance to shear, at the selected measurement points, as well as the established dependence, indicate the possible application of hand-held devices for determining the soil resistance of forest ecosystems to erosion processes.
AB  - Ерозија земљишта је најзаступљенији облик деградације земљишта како у свету тако и у Србији. Деградирани шумски екосистеми не пружају довољну заштиту земљишта те су често велике површине захваћене ерозионим процесима. Важну улогу при оцени отпорности земљишта на ерозионе процесе има напон смицања. Истраживано подручје лоцирано је у југозападном делу Београда чије су површине под шумом изложене интензивним ерозионим процесима. Читава површина испресецана је јаругама и плитким клизиштима. Одабрано је 13 профила на јаругама на којима је извршено мерење отпорности земљишта приручним апаратима на три тачке дуж профила (лева обала, јаруга, десна обала) и по две дубине. За теренска мерења изабрани су приручни апарати: џепна крилна сонда (Eijkelkamp модел M1.14.10.E) и џепни (ручни) статички пенетрометар (Eijkelkamp модел M1.06.03.E). У раду су приказани механички параметри мерени приручним апаратима са опсегом вредности чврстоће земљишта на смицање τ = 11,58 – 172,42 kN∙m-2 и отпора при продору игле R = 159,36 – 441,30 kN∙m-2. Утврђена је статистичка зависност између вредности добијених мерењима крилном сондом и пенетрометром, са коефицијентом корелације r = 0,65 и коефицијентом детерминације r2 = 0,42. Утврђене разлике у вредностима отпорности земљишта на смицање, на изабраним мерним тачкама, као и утврђена зависност указују на могућу примену приручних апарата за одређивање отпорности земљишта шумских екосистема на ерозионе процесе.
PB  - Скопје, Р. С. Македонија : Друштво за геотехника на Македонија / Skopje, R. N. Macedonia : Macedonian association for geotechnics
C3  - Zbornik radova - Inženjerski problemi u mekim stenama - Druga konferencija regionalnih geotehničkih društava, Specijalizovana konferencija ISRM-a, Peti simpozijum DGM-a / Engineering problems in soft rocks : proceedings of the 5th Symposium of the Macedonian association for geotechnics, an ISRM Specialized Conference, 2nd Conference of regional geotechnical societies 23-25.6.2022, Ohrid, R. N. Macedonia
T1  - Могућност примене приручних апарата за одређивања отпорности земљишта на ерозионе процесе шумских екосистема
VL  - 2
SP  - 829
EP  - 838
UR  - https://hdl.handle.net/21.15107/rcub_cer_6514
ER  - 
@conference{
author = "Živanović, Nikola and Rončević, Vukašin and Čebašek, Vladimir and Rupar, Veljko and Ćorluka, Stevan and Polovina, Siniša",
year = "2022",
abstract = "Soil erosion is the most prevalent form of soil degradation both in the world and in Serbia. Degraded forest ecosystems do not provide sufficient soil protection and often large areas are affected by erosion processes. Shear stress plays an important role in assessing soil resistance to erosion processes. The investigated area is located in the southwestern part of Belgrade, whose areas under the forest are exposed to intense erosion processes. The entire surface is crisscrossed by gullies and shallow landslides. 13 profiles on gullies were selected, where soil resistance was measured with hand-held devices at three points along the profile (left bank, gully, right bank) and two depths each. Handy devices were chosen for field measurements: pocket wing probe (Eijkelkamp model M1.14.10.E) and pocket (hand) static penetrometer (Eijkelkamp model M1.06.03.E). The paper presents mechanical parameters measured with hand-held devices with a range of values of soil shear strength τ = 11.58 – 172.42 kN∙m-2 and pin penetration resistance R = 159.36 – 441.30 kN∙m-2. A statistical dependence was established between the values obtained by wing probe and penetrometer measurements, with a correlation coefficient of r = 0.65 and a determination coefficient of r2 = 0.42. The established differences in the values of soil resistance to shear, at the selected measurement points, as well as the established dependence, indicate the possible application of hand-held devices for determining the soil resistance of forest ecosystems to erosion processes., Ерозија земљишта је најзаступљенији облик деградације земљишта како у свету тако и у Србији. Деградирани шумски екосистеми не пружају довољну заштиту земљишта те су често велике површине захваћене ерозионим процесима. Важну улогу при оцени отпорности земљишта на ерозионе процесе има напон смицања. Истраживано подручје лоцирано је у југозападном делу Београда чије су површине под шумом изложене интензивним ерозионим процесима. Читава површина испресецана је јаругама и плитким клизиштима. Одабрано је 13 профила на јаругама на којима је извршено мерење отпорности земљишта приручним апаратима на три тачке дуж профила (лева обала, јаруга, десна обала) и по две дубине. За теренска мерења изабрани су приручни апарати: џепна крилна сонда (Eijkelkamp модел M1.14.10.E) и џепни (ручни) статички пенетрометар (Eijkelkamp модел M1.06.03.E). У раду су приказани механички параметри мерени приручним апаратима са опсегом вредности чврстоће земљишта на смицање τ = 11,58 – 172,42 kN∙m-2 и отпора при продору игле R = 159,36 – 441,30 kN∙m-2. Утврђена је статистичка зависност између вредности добијених мерењима крилном сондом и пенетрометром, са коефицијентом корелације r = 0,65 и коефицијентом детерминације r2 = 0,42. Утврђене разлике у вредностима отпорности земљишта на смицање, на изабраним мерним тачкама, као и утврђена зависност указују на могућу примену приручних апарата за одређивање отпорности земљишта шумских екосистема на ерозионе процесе.",
publisher = "Скопје, Р. С. Македонија : Друштво за геотехника на Македонија / Skopje, R. N. Macedonia : Macedonian association for geotechnics",
journal = "Zbornik radova - Inženjerski problemi u mekim stenama - Druga konferencija regionalnih geotehničkih društava, Specijalizovana konferencija ISRM-a, Peti simpozijum DGM-a / Engineering problems in soft rocks : proceedings of the 5th Symposium of the Macedonian association for geotechnics, an ISRM Specialized Conference, 2nd Conference of regional geotechnical societies 23-25.6.2022, Ohrid, R. N. Macedonia",
title = "Могућност примене приручних апарата за одређивања отпорности земљишта на ерозионе процесе шумских екосистема",
volume = "2",
pages = "829-838",
url = "https://hdl.handle.net/21.15107/rcub_cer_6514"
}
Živanović, N., Rončević, V., Čebašek, V., Rupar, V., Ćorluka, S.,& Polovina, S.. (2022). Могућност примене приручних апарата за одређивања отпорности земљишта на ерозионе процесе шумских екосистема. in Zbornik radova - Inženjerski problemi u mekim stenama - Druga konferencija regionalnih geotehničkih društava, Specijalizovana konferencija ISRM-a, Peti simpozijum DGM-a / Engineering problems in soft rocks : proceedings of the 5th Symposium of the Macedonian association for geotechnics, an ISRM Specialized Conference, 2nd Conference of regional geotechnical societies 23-25.6.2022, Ohrid, R. N. Macedonia
Скопје, Р. С. Македонија : Друштво за геотехника на Македонија / Skopje, R. N. Macedonia : Macedonian association for geotechnics., 2, 829-838.
https://hdl.handle.net/21.15107/rcub_cer_6514
Živanović N, Rončević V, Čebašek V, Rupar V, Ćorluka S, Polovina S. Могућност примене приручних апарата за одређивања отпорности земљишта на ерозионе процесе шумских екосистема. in Zbornik radova - Inženjerski problemi u mekim stenama - Druga konferencija regionalnih geotehničkih društava, Specijalizovana konferencija ISRM-a, Peti simpozijum DGM-a / Engineering problems in soft rocks : proceedings of the 5th Symposium of the Macedonian association for geotechnics, an ISRM Specialized Conference, 2nd Conference of regional geotechnical societies 23-25.6.2022, Ohrid, R. N. Macedonia. 2022;2:829-838.
https://hdl.handle.net/21.15107/rcub_cer_6514 .
Živanović, Nikola, Rončević, Vukašin, Čebašek, Vladimir, Rupar, Veljko, Ćorluka, Stevan, Polovina, Siniša, "Могућност примене приручних апарата за одређивања отпорности земљишта на ерозионе процесе шумских екосистема" in Zbornik radova - Inženjerski problemi u mekim stenama - Druga konferencija regionalnih geotehničkih društava, Specijalizovana konferencija ISRM-a, Peti simpozijum DGM-a / Engineering problems in soft rocks : proceedings of the 5th Symposium of the Macedonian association for geotechnics, an ISRM Specialized Conference, 2nd Conference of regional geotechnical societies 23-25.6.2022, Ohrid, R. N. Macedonia, 2 (2022):829-838,
https://hdl.handle.net/21.15107/rcub_cer_6514 .