Россия
УДК 556 Гидросфера. Вода в целом. Общая гидрология
УДК 55 Геология. Геологические и геофизические науки
УДК 550.34 Сейсмология
УДК 550.383 Главное магнитное поле Земли
ГРНТИ 37.01 Общие вопросы геофизики
ГРНТИ 37.15 Геомагнетизм и высокие слои атмосферы
ГРНТИ 37.25 Океанология
ГРНТИ 37.31 Физика Земли
ГРНТИ 38.01 Общие вопросы геологии
ГРНТИ 36.00 ГЕОДЕЗИЯ. КАРТОГРАФИЯ
ГРНТИ 37.00 ГЕОФИЗИКА
ГРНТИ 38.00 ГЕОЛОГИЯ
ГРНТИ 39.00 ГЕОГРАФИЯ
ГРНТИ 52.00 ГОРНОЕ ДЕЛО
ОКСО 05.00.00 Науки о Земле
ББК 26 Науки о Земле
ТБК 63 Науки о Земле. Экология
BISAC SCI SCIENCE
Changes in the Ob River sediment runoff caused by current climatic and socio-economic changes in Russian Federation have a multidirectional character in the middle and lower courses of the watercourse. According to meteorological observations, the air temperature in the studied region increased by 2 °C, and annual precipitation layers by more than 80 mm/yr, while the area of agricultural land in the middle reaches of the river decreased by 40% compared to the period before 1990. A decrease in acreage in the catchment area of the middle stream caused a three-fold decrease in sediment runoff during the high water period, while the activation of thermal erosion processes in the lower reaches led to a two-fold increase in sediment runoff during the same period. As a result of water and sediment runoff modeling according to climate forecasts, it was found that by the end of the 21st century, the average annual water runoff of the Ob River for the RCP 2.6 scenario increases by 20% relative to the period 1991–2020, while sediment runoff almost does not change. At the same time, the RCP 8.5 scenario provides a decrease in water and sediment runoff.
watercourse, sediment runoff, Arctic, climate change, anthropogenic influence, thermal erosion, forecast
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