No abstract

The present paper considers landscape and hydrological systems and erosion processes in the middle Ob territory. In the monograph by A.N. Antipov and V.N. Fedotov [1], the middle Ob territory belongs to Ob-and-Irtysh forest-boggy, lowland accumulative landscape hydrological system of Western Siberia. In recent years, many significant events of natural character within the middle Ob territory (high level of floodwater in 2002, 2007 and 2015 and unusually warm and low water summer in 2003, 2012 and 2016) bring into focus the role of climatic changes. Variations of meteorological parameters provoke spikes in the development of the leading class of factors related to the complex of natural processes. A map of the key sector of the studied region is drawn to spatially visualize the structure of valley landscapes of the middle Ob region. Erosion processes are observed at the initiative station called “Ust-Vakhsky”. Within the sector of the station, the maximum bank recession rate measured by Tymen complex geological survey expedition in 1988 is 25 m/year, and the long-term average is 5.26 m/year (1983-1994). Long-term average annual bank recession rate by monitored cross section over 2002 - 2018 is 2.9 m/year. The maximum bank recession rate measured in 2004 is 17.5 m/year at the fifth cross section.

Publishing house "Sreda" 1 Content is licensed under the Creative Commons Attribution 4.0 license (CC-BY 4.0) Коркина Елена Александровна канд. геогр. наук, доцент, заведующая кафедрой Середовских Борис Анатольевич канд. геогр. наук, доцент ФГБОУ ВО «Нижневартовский государственный университет» г. Нижневартовск, ХМАО -Югра

The research touches upon marsh landscapes in the context of temperature monitoring and in connection with exogenous processes during engineering intervention. The monitoring of temperature regimes was conducted in the mid-taiga subzone of marsh landscapes for revealing the dynamics of exogenous processes. The authors used the method of recording systems for the field measurement of the temperature of the peat and underlying soils. The measurements were conducted on a territory that belongs to the middle taiga landscapes of Western Siberia. The authors of the research analyze the data obtained from thermowells 5, 5a and 6. During the observation period of 2015-2016, the average annual temperature was 8.3 ºC for thermowell 5a (technogenic area), which is 3.8 ºC and 4.2 ºC higher than the average annual values of thermowell 5 and thermowell 6 respectively. The latter belongs to natural marsh landscapes. Observations conducted in 2016-2017 confirmed this fact with a difference of 4.8 ºC and 3.7 ºC for thermowells 5 and 6 respectively. As compared to natural marsh landscapes not affected by man-made impact, a higher temperature was observed on soils, which affects the manifestation of exogenous processes.