5 research outputs found
ΠΠΎΠ²ΡΠ΅ Π΄Π°Π½Π½ΡΠ΅ ΠΎ ΡΡΠ°Π½ΡΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΡΡΠΎΠΊΠ° Π²ΠΎΠ΄Ρ ΠΈ Π½Π°Π½ΠΎΡΠΎΠ² Π² Π΄Π΅Π»ΡΡΠ΅ ΡΠ΅ΠΊΠΈ ΠΠ΅Π½Ρ ΠΏΠΎ ΠΈΡΠΎΠ³Π°ΠΌ ΡΠΊΡΠΏΠ΅Π΄ΠΈΡΠΈΠΎΠ½Π½ΡΡ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ Π² Π°Π²Π³ΡΡΡΠ΅ 2022 Π³.
Field hydrological measurements were performed in the Lena River delta from the 10th to the 16th of August 2022. 25 values of water discharge and 58 suspended sediment concentrations (SSC) were measured, multiple chemical composition water samples were taken, along with samples of bottom and bank river sediments, and thermal abrasion coasts were highlighted. Particle size and chemical composition analyses of the sediment samples were carried out. The aim of the study was to estimate the water flow distribution in the delta and to determine the directional SSC, sediment particle size and chemical composition changes along the delta and inside the depth of the river flow, and define the roles of the local hydrological and morphological factors of river flow transformation. Moreover, field measurements are crucial for SSC estimation and monitoring based on satellite image data. The laboratory analyses included particle size definition in suspended and bottom sediment samples, organic matter and SSC definition. The August 2022 expedition results were compared to the previous surveys. It was established that the flow distribution around the Stolb island corresponds with that of 2016: the Bykovsky, Trophimovsky, Tumatsky and Oleneksky branches receive 24.9β25.5, 58β59.2, 6 and 6.6 % of the water discharge from the Kusur gauging station on the Lena River, respectively. However, the role of the Main channel was slightly overestimated. The new data includes water discharges in the branches around the Samoilovsky island and in the channel systems of the Oleneksky and Tumatsky branches. SSC was relatively low and amounted to around 12β24 mg/l, rising from the water surface to the bottom 1.2β2 times. SSC decreased along the course of the Oleneksky and Tumatsky branches (1.5 and 1.1 times, respectively) due to the ratio between SSC and the potential stream transport capacity. SSC rose along the course of the Bykovsky branch, even though it wasnβt shown by the Landsat-8 satellite image (16th of August 2022). A significant sediment source in the delta are eroded and thermo eroded shores of the edoma island systems. The average sediment size proved to be from 0.011 to 0.019 mm. SSC does not vary much around the main channel and the nearest branches. Important relations between SSC, optical turbidity and ADCP backscatter intensity were estimated. The coarse diameter of 30 bottom sediment samples was 0.46 mm. The largest sediments were discovered in the Bykovsky branch, while the smallest sediments were found in the smaller transverse branches. Along the Tumatsky and Oleneksky branches the bottom sediments alternate from fine to medium sands.Π‘ΡΠ°ΡΡΡ ΡΠΎΠ΄Π΅ΡΠΆΠΈΡ Π²Π°ΠΆΠ½ΡΠ΅ ΠΈΡΠΎΠ³ΠΈ ΠΏΠΎΠ»Π΅Π²ΡΡ
ΠΈ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΡΡ
Π³ΠΈΠ΄ΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ, ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ²ΡΠΈΡ
ΡΡ Π² Π΄Π΅Π»ΡΡΠ΅ Ρ. ΠΠ΅Π½Ρ Ρ 10 ΠΏΠΎ 16 Π°Π²Π³ΡΡΡΠ° 2022 Π³. ΠΡΠ»ΠΈ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½Ρ 25 ΡΠ°ΡΡ
ΠΎΠ΄ΠΎΠ² Π²ΠΎΠ΄Ρ ΠΈ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Π²Π·Π²Π΅ΡΠ΅ΠΉ Π²Π±ΡΠ΅ΡΠ½ΡΡ
Π²ΠΎΠ΄Π°Ρ
, ΠΎΡΠΎΠ±ΡΠ°Π½Ρ ΠΏΡΠΎΠ±Ρ Π²ΠΎΠ΄Ρ, ΠΎΠ±ΡΠ°Π·ΡΡ Π΄ΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΈ Π±Π΅ΡΠ΅Π³ΠΎΠ²ΠΎΠ³ΠΎ Π³ΡΡΠ½ΡΠΎΠ² Π½Π° Π³ΡΠ°Π½ΡΠ»ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΈ Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠΉ ΡΠΎΡΡΠ°Π², ΠΎΡΠΌΠ΅ΡΠ΅Π½Ρ ΡΠ°Π·ΠΌΡΠ²Π°Π΅ΠΌΡΠ΅ Π±Π΅ΡΠ΅Π³Π°. Π¦Π΅Π»ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ Π±ΡΠ»ΠΎ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡΠ±ΡΡΠΎΠΊΠ° Π²ΠΎΠ΄Ρ ΠΈ Π½Π°Π½ΠΎΡΠΎΠ² ΠΠ΅Π½Ρ ΠΌΠ΅ΠΆΠ΄Ρ Π΄Π΅Π»ΡΡΠΎΠ²ΡΠΌΠΈ ΡΡΠΊΠ°Π²Π°ΠΌΠΈ, ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΉ ΠΌΡΡΠ½ΠΎΡΡΠΈ Π²ΠΎΠ΄Ρ, Π³ΡΠ°Π½ΡΠ»ΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈ Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΎΡΡΠ°Π²Π° Π½Π°Π½ΠΎΡΠΎΠ² ΠΎΡ Π²Π΅ΡΡΠΈΠ½Ρ ΠΊ ΠΌΠΎΡΡΠΊΠΎΠΌΡ ΠΊΡΠ°Ρ Π΄Π΅Π»ΡΡΡ, ΠΏΠΎ Π³Π»ΡΠ±ΠΈΠ½Π΅ ΠΈ ΡΠΈΡΠΈΠ½Π΅ ΠΏΠΎΡΠΎΠΊΠ°, ΡΠΎΠ»ΠΈ Π² Π½ΠΈΡ
ΠΌΠ΅ΡΡΠ½ΡΡ
Π³ΠΈΠ΄ΡΠΎΠ»ΠΎΠ³ΠΎ-ΠΌΠΎΡΡΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΈ ΡΠ΅ΡΠΌΠΎΠ°Π±ΡΠ°Π·ΠΈΠΎΠ½Π½ΡΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ². ΠΠΎΠ»ΡΡΠ΅Π½Π½ΡΠ΅ Π½Π°ΡΡΡΠ½ΡΠ΅ Π΄Π°Π½Π½ΡΠ΅ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΡ Π΄Π»Ρ ΠΏΠΎΠ·Π½Π°Π½ΠΈΡ ΠΎΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠ΅ΠΉ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ ΡΠ°ΡΡΡΠ΅Π΄ΠΎΡΠΎΡΠ΅Π½ΠΈΡ ΡΡΠΎΠΊΠ° Π²ΠΎΠ΄Ρ ΠΈ Π½Π°Π½ΠΎΡΠΎΠ² Π² ΠΎΠ³ΡΠΎΠΌΠ½ΠΎΠΉ ΠΈ ΠΌΠ½ΠΎΠ³ΠΎΡΡΠΊΠ°Π²Π½ΠΎΠΉ Π΄Π΅Π»ΡΡΠ΅ ΠΠ΅Π½Ρ, Π΅Π³ΠΎ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠΉ Ρ ΠΌΠΎΠΌΠ΅Π½ΡΠ° ΠΏΠΎΡΠ»Π΅Π΄Π½ΠΈΡ
ΡΡΠ°ΡΠΈΠΎΠ½Π°ΡΠ½ΡΡ
ΠΈ ΡΠΊΡΠΏΠ΅Π΄ΠΈΡΠΈΠΎΠ½Π½ΡΡ
ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ, Π΄Π»Ρ Π΄Π΅ΡΠΈΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠΏΡΡΠ½ΠΈΠΊΠΎΠ²ΡΡ
ΡΠ½ΠΈΠΌΠΊΠΎΠ², ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ ΠΈΠ½ΡΡΡΡΠΌΠ΅Π½ΡΠ°ΡΠΈΡ Π΄Π»Ρ ΠΏΠ΅ΡΠ΅ΡΡΠ΅ΡΠ° ΠΏΠΎΠ²Π΅ΡΡ
Π½ΠΎΡΡΠ½ΡΡ
ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ Π² ΠΎΡΡΠ΅Π΄Π½Π΅Π½Π½ΡΠ΅ ΠΏΠΎ ΡΠ΅ΡΠ΅Π½ΠΈΡ ΠΏΠΎΡΠΎΠΊΠ°