Oleshkivski Sands as a hierarchically built natural system

Kryvulchenko, Anatolii

doi:10.30970/vgg.2019.53.10666

Cited by 3 publications

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“…га з наявних 200 тис. га Олешшя [25]) створено однойменний національний природний парк. У районі Великого Лугу (а отже, колишнього Каховського водосховища) найцінніші степові ділянки збереглися по сухих балках, що «стікають» до Дніпра як з правого, так і з лівого берегів.…”

Section: наука і суспільствоunclassified

Пріоритети В Охороні Природи В Умовах Війни: Ситуація З Великим Лугом І Великим Степом

Загороднюк

2023

Visn. Nac. Akad. Nauk Ukr.

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У статті розглянуто природоохоронне і біогеографічне значення комплексу екосистем Великого Лугу і Придніпровського Степу у системі природних комплексів, знищених або суттєво порушених внаслідок гідробудівництва Каховського водосховища і системи водогінних магістральних та іригаційних каналів, що йдуть від нього. Руйнація водосховища внаслідок воєнних дій у червні 2023 р. стала новою, вже другою (після його створення) екологічною катастрофою, за якою меліоратори починають планувати третю — повторне перекриття водотоку Дніпра і відновлення первинних функцій водосховища. Докладно проаналізовано цінність територій, вивільнених від води (заплава) та іригації (степ), перспективи відновлення екосистем, підстави та засади такого відновлення, а також комплекс мінімально необхідних біотехнічних заходів для каналізації і корегування процесів відновлення природи й подолання наслідків девастації внаслідок виголення дна водосховища, а також припинення зрошення значних територій Степу.

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Section: наука і суспільствоunclassified

Пріоритети В Охороні Природи В Умовах Війни: Ситуація З Великим Лугом І Великим Степом

Загороднюк

2023

Visn. Nac. Akad. Nauk Ukr.

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Micromorphological and Morphoscopic Parameters of Sand Grains as Interpretation Indication of the Genesis of Kinburnska Arena

Kryvulchenko

2023

Ukr. geogr. z.

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The Кіnburnska arena is one of the seven sand massifs of the Oleshkivsky Sands (Oleshia). In order to clarify the genesis of the relief forms of the Kinburngska аrena and in general the formation of the territory of the Oleshkivsky Sands, a map-scheme of the types of relief forms of the Kinburnska arena is presented for the first time. Another goal of this research was to find out the priority of fluvial or аeolian processes in the formation of arena landforms. In this regard, for the first time, micromorphological and morphoscopic studies of sand grains from deposits of hilly landforms were conducted here. The typology of landforms showed the geomorphological diversity of the arena and evidenced the manifestation of specific, here and there unique landforms. Unique for the territory of Europe here are discrete parallel ridges of the south of the arena, which are a manifestation of giant ripples (diluvial dunes). The author examines their formation in the context of the diluvial paradigm, in particular in relation to fluvioglacial processes at the end of the Pleistocene and flood-overflow processes in the Holocene. The specific formations of the arena here include ridges and depressions formed as a result of the flow of water masses from the water area of the Dniprovsko-Buzkyi liman to the Black Sea (western part of the arena), as well as its Yagorlytskyi Bay (eastern part of the arena). The analysis of the parameters of sand grains from the deposits of various geocomplexes of the Kinburnska arena showed the predominance of weakly rolled grains, as well as the dominance of bugor and bugor-stepped texture of the surface sand grains with almost universal development of micro- and nanoforms on their surface. The typology of the relief forms of the arena and the interpretation of the parameters of the analyzed sand grains proved the dominant role of fluvial processes in the formation of the relief of sandy deposits of the Kinburnska arena and the subordinate importance of aeolian processes.

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Evaluation of indicators for desertification risk assessment of Oleshky sands desertification based on Landsat data time series

Lubskyi¹,

Orlenko

Piestova

et al. 2023

UJRS

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Earth's surface monitoring allows the assessment of the dynamics and mapping of desertification indicators and is currently one of the priority research regions in remote sensing. In addition to the fact that desertification is a serious global threat to economic, social and food security, the risks of desertification have also become relevant for southern Ukraine. In recent years, climate change has become more and more noticeable in Ukraine. As a result, the time frames of the seasons are blurred, the boundaries of natural zones are shifting, abnormal values of meteorological indicators are increasingly observed, and the intensity of natural disasters is increasing. Since southern Ukraine is most vulnerable to adverse climate and landscape changes, including desertification, the article considered long-term landscape changes on the right bank of the Dnieper River in the Kherson region, mainly represented by sandy massifs of the Oleshky region, which are called the Oleshky Sands. Arid landscapes, which include the vast majority of Oleshky, are especially vulnerable to degradation processes, so space monitoring this territory is an urgent task given the current global climate changes. Within the framework of the presented study, the long-term dynamics of several indicators of desertification within the sandy arenas of the Oleshkovsky sands were mapped. Based on a series of multispectral space images obtained by Landsat satellites for the period 1986-2020 was considered. Spectral ranges characterize the key biophysical aspects of arid landscapes: the degree of soil moisture, vegetation density and sand distribution. Regression analysis was used to illustrate the dynamics of each indicator, which showed a general increase in each indicator over the experimental period. Furthermore, we determined the relationship between the values of the rise in desertification indicators and landscape changes that occurred in the research region, the classification of several images for different years was also carried out, and spatial and quantitative changes in the distribution of land cover classes were characterized.

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Oleshkivski Sands as a hierarchically built natural system

Cited by 3 publications

References 0 publications

Пріоритети В Охороні Природи В Умовах Війни: Ситуація З Великим Лугом І Великим Степом

Пріоритети В Охороні Природи В Умовах Війни: Ситуація З Великим Лугом І Великим Степом

Micromorphological and Morphoscopic Parameters of Sand Grains as Interpretation Indication of the Genesis of Kinburnska Arena

Evaluation of indicators for desertification risk assessment of Oleshky sands desertification based on Landsat data time series

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