THE PROPERTIES OF RIVER ALLUVIUMS OF THE UPPER-DNIESTER ALLUVIAL PLAIN
Journal Title: Вісник Львівського університету. Серія географічна - Year 2017, Vol 51, Issue
Abstract
Alluvial soil formation is a dynamic process, the main prerequisite of which is the regular, periodic flooding of the river floodplain with flood waters, which are enriched with multidispersed organic and mineral particles. During the last century, about 80 % of territory of the Upper-Dniester alluvial plain was transformed by means of hydrotechnical construction: waterproof dams and drainage channels have broken the wide river floodplains into isolated fragments, making impossible the free flow of flood waters, enriched with silt. The results of the study of stratification patterns of the river silt in the riverbed floodplain, depending on the flow velocity, granulometric composition, physical and chemical properties, given its role in the floodplain soil formation are given. The granulometric composition of the Dniester River silt changes downstream from the sandy to the heavy-loamy; In the floodplains of the Stryj and Svicha rivers medium- and heavy-loamy deposits are postponed, respectively. In the upper part of the Upper-Dniester alluvial plain (Chaikovichi 1, 2) accumulates a silt with predominance of the medium and fine sand fraction, which forms a good filtration ability of soils, whereas downstream the physical clay content increases (up to 47.2 %), which makes the river silt an important source of mineral nutrition of plants. The domination (over 40 %)in silt granulometric composition the rough dust fraction (Ustia 1, Zalisky 1) contributes to the improvement of the water-physical properties of alluvial soils and provides optimal conditions for the biota functioning. For the investigated river alluviums an alkaline reaction of the extract (pH (H2O) = 7,44–8,03) and low content of humus (0,54–3,80 %) are characteristic. The amount of nitrogen in the silt varies within 1,47–18,20 mg/100 g of soil. The river alluviums of the Upper-Dniester alluvial plain are an active factor in floodplain soil formation since it optimizes the water-physical and physical-chemical properties of alluvial soils. But the influence area of silt on the soils is sharply reduced and is limited only to the space in front of the dams. In the soils outside the dam, to which no fresh alluvial material comes, the hydrological regime is rebuilt and properties change substantially, up to the loss of their typological alluvial features.
Authors and Affiliations
Khrystyna Perets, Oksana Vovk, Oleh Orlov, Olena Lutsyshyn
Keywords
Related Articles
- EP ID EP322490
- DOI -
- Views 53
- Downloads 0
MODE OF ATMOSPHERIC CONNECTION OF SOIL VOLYNES IN THE MODERN CLIMATE CONDITIONS
The article analyzes in detail the dynamics of atmospheric precipitation for the entire instrumental period of observations in the territory of the Volyn region at six meteorological stations. The deviation in the parame...
THE SOILS OF THE CARPATHIAN REGION OF UKRAINE AS OBJECTS OF SCIENTIFIC TOURISM
Scientific tourism includes ecological, ethno-cultural, underwater, cognitive one and many other types of tourism, the main feature of which is active participation of tourists in the tour, and not just acquisition of in...
CONTRIBUTION OF ROMANIAN SPEAKING SCIENTISTS IN THE DEVELOPMENT OF GEOGRAPHIC RESEARCHES IN BUKOVINA
The research and discovery of unknown pages of Ukrainian geography is an essential condition for the development of all areas of scientific and geographical process. The study and research of scientific heritage of Roman...
CHANGE OF GENERAL PHYSICAL PROPERTIES OF UKRAINIAN CARPATHIANS BUROZEMS (CAMBISOLS) UNDER THE DIFFERENT PHYTOCOENOSES
Physical properties of soils determine the ecological status of forest ecosystems, in particular, virgin forest. In turn, the development of the plants' root system, the nature of the soils’ moisture and nutrient regimes...
PROBLEM OF THE ALKALINITY DEGREE DIAGNOSTIC IN THE SOILS OF THE NORTHWEST OF THE BLACK SEA REGION
According to the results of the study of soils in the Northwest of the Black Sea region, it is determined that here, in the profile of vorony-calcic and calcic Chernozems, both residual and weak alkalinity are manifested...