Modelling suspended sediment distribution in the Selenga River Delta using LandSat data
Моделирование распределения взвешенных наносов в дельте реки Селенга с использованием данных Landsat
2017-03-03
SCID: 54.1/96x7k9cm
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LandSat imagerySelenga River Deltadischarge threshold 1500 m3 s−1seasonal variabilitysuspended sediment concentration
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Abstract (AI)
Abstract. The Selenga River is the largest tributary of Baikal Lake and it's delta covers around 600 km2. Suspended sediment concentrations (SSC) in the Selenga river delta were modelled based on LandSat images data. The seasonal variability in suspended sediment retention during the period 1989 to 2015 was calculated. The results suggest that sediment storage in the Selenga delta is observed during high discharges (> 1500 m3 s−1), whereas sediment export increases under lower flow conditions (< 1500 m3 s−1). The changes in seasonal SSC patterns are explained by wetland inundation during floods and channel erosion or Baikal wind surge during low flow periods.
Key Findings
1
Seasonal SSC pattern changes are attributed to wetland inundation during floods and to channel erosion or Baikal wind surge during low-flow periods.
2
Seasonal variability of suspended sediment retention in the delta was quantified for the period 1989–2015.
3
Sediment export from the delta increases under lower flow conditions below 1500 m3 s−1.
4
Sediment storage in the Selenga delta predominates during high discharge events greater than 1500 m3 s−1.
5
Suspended sediment concentrations (SSC) in the Selenga River delta were successfully modeled using Landsat imagery from 1989 to 2015.
Research Object
Suspended sediment concentrations (SSC) in the Selenga River delta as observed via Landsat imagery
Research Subject
Seasonal variability and spatial distribution of suspended sediment retention versus export in the Selenga River delta and its relation to discharge regimes (>1500 m3 s−1 vs <1500 m3 s−1), wetland inundation, channel erosion, and Baikal wind surge
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2017-03-03
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