The study of the modern ecological state of shelterbelts using GIS and remote sensing data

DOI: 10.35595/2414-9179-2020-2-26-54-65

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About the Authors

Anastasiya G. Narozhnyaya

Belgorod State National Research University, Institute of Earth Sciences,
Pobedy str., 85, 308015, Belgorod, Russia,
E-mail: narozhnyaya_a@bsu.edu.ru

Yurii G. Chendev

Belgorod State National Research University, Institute of Earth Sciences,
Pobedy str., 85, 308015, Belgorod, Russia,
E-mail: chendev@ bsu.edu.ru

Abstract

Digitization of maps of land-use (scale 1 : 10 000) 1955–1956, 1980–1981s years of surveying, visual interpretation of satellite images of the modern period of high resolution (2017), as well as extrapolation of these data, allowed us to establish that on the territory of the Belgorod oblast the length of shelterbelts from the 1950s to 2017 increased 2 times — from 14 600 km to 29 600 km. At the same time, in comparison with the 1950s, in the 1980s, the length of anti-erosion shelterbelts increased more than 3 times and the length of protective shelterbelts decreased by 9 %. On average, on the territory of the Belgorod region, about 0.96 km per 1000 km of shelterbelts before 1955, annually retires from circulation. The rate of loss of shelterbelts in the period 1950–1980s — 0.23 km/year×1000 km. About 0.13 km/year×1000 km of shelterbelts loses the integrity of the stand and shelterbelts become fragmented. The reasons for the reduction of shelterbelts is their aging, lack of systematic care, destruction with an increase in the area of settlements. Visual interpretation of space images allowed identifying the disturbed sites of shelterbelts in which the rarefaction (fragmentation) of forest stand is marked. 693 800 ha of arable land of the region belongs to slopes over 2°. On them in the 1950–1980s the 10 300 km of protective shelterbelts were created, out of which about 50 % deviate from the horizontal direction by more than 30°, which leads to soil erosion and the formation of scours, and then — gullies. Only 8.7 % of the contour shelterbelts on arable land from the total length of protective shelterbelts were determined. According to additional calculations, for 35 % of protective shelterbelts located relative to the horizontal lines correctly, the potential amount of soil flushing exceeds the permissible values by an average of 41 %, i.e. it is necessary to create additional shelterbelts higher up the slope on arable land. The inverse relationship between the length of disturbed and abandoned shelterbelts and the values of the hydrothermal coefficient (НTC) (r = -0.44) is revealed: in more arid climatic conditions of the Belgorod oblast the viability of shelterbelts decreases. On southern slopes above 4° reduction of length of shelterbelts at change of НTC occurs faster, than on slopes of other aspect.

Keywords

shelterbelts, spatial-temporal dynamics of shelterbelts, ecological condition of shelterbelts, space images of high spatial resolution, GIS

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For citation: Narozhnyaya A.G., Chendev Yu.G. The study of the modern ecological state of shelterbelts using GIS and remote sensing data. InterCarto. InterGIS. GI support of sustainable development of territories: Proceedings of the International conference. Moscow: Moscow University Press, 2020. V. 26. Part 2. P. 54–65. DOI: 10.35595/2414-9179-2020-2-26-54-65 (in Russian)