Dynamics of suspended sediment in the Južna Morava river, south-eastern Serbia
This study estimate the temporal trends of recent suspended sediment in Južna Morava river. The variations of suspended sediment transport were analyzed at different time scales (inter-annual, monthly and seasonal, among different periods), based on 47-year hydrological data from the outlet...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Serbian Geographical Society
2025-01-01
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| Series: | Glasnik Srpskog Geografskog Društva |
| Subjects: | |
| Online Access: | https://doiserbia.nb.rs/img/doi/0350-3593/2025/0350-35932501001M.pdf |
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| Summary: | This study estimate the temporal trends of recent suspended sediment in
Južna Morava river. The variations of suspended sediment transport were
analyzed at different time scales (inter-annual, monthly and seasonal, among
different periods), based on 47-year hydrological data from the outlet
hydrological station. The results indicate of a decline in suspended
sediment concentration and sediment load in the long-time series, which can
be divided into three periods: high SSC or Qs (1961-1976), medium SSC or Qs
(1977-1988) and low SSC or Qs (1989-2007). The average annual SSC and Qs of
these three periods are SSC=0.7284 g/l, SSC=0.3580 g/l, SSC=0.1865 g/l, and
Qs=4260x103 t, Qs=2277 x103 t, Qs=789 x103 t, respectively. The decrease in
SSC and Qs is at the significance level of α=0.001. The frequency
distribution of the daily SSC show that cumulatively 92% of daily SSC during
the low stage was u distributed in classes up to 0.5 g/l, versus 82% during
the medium and 67% during the high period. The frequency of daily SSC in the
class of 1-5 g/l decreases over time, from 14% in high period to 6% in low
period. In the period 1989-2007 have not been reported SSC greater than 5
g/l. Different patterns of suspended sediment concentration SSC-Q hysteretic
loops have been observed for each period. Two types of hysteretic loops
were found at Južna Morava River: figure-eight typical of periods 1961-1976
and 1978-1988 and counter-clockwise in period 1989-2007. Human impact is the
main factor in reducing suspended sediments. An important change in
agriculture land in the basin recorded a significant impact on sediment
transport. |
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| ISSN: | 0350-3593 2406-078X |