Wszystkie pola: natural torrent - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Erosional Damages on Concave Banks of Directional Arcs in Natural Torrent Bed
Autorzy:: Jakubis, Matúš
Jakubisová, Mariana
Powiązania:: https://bibliotekanauki.pl/articles/2173373.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: erosion
natural torrent
simple circular arc
Opis:: The article deals with the research of erosive damages of concave (outer) sides in directional circular arcs in the natural torrent bed. The research was carried out on 22 reference circular arcs on the Hučava torrent in the geomorphological unit of Poľana (Central Slovakia). The relation between R/Wbkf ratio (radius of curvature R/torrent bed width inside the banks Wbkf) and the bank slope angle BA of the concave arc BA = f(R/Wbkf) was analyzed. The relationship between R/Wbkf ratio and the percentage of vegetation cover VEG on the concave bank of the directional arc VEG = f(R/Wbkf) was analyzed as well. At the same time, the relation between ratio R/Wbkf and the VEG/BA coefficient was studied, which simultaneously the influence of vegetation cover and bank slope in connection with its erosive damage VEG/BA = f(R/Wbkf). It was found that the determination index for the relation BA=f(R/Wbkf) has the value of R2 = 0.924, for the relation VEG = f(R/Wbkf) the value of R2 = 0.953 and for the relation VEG/BA = f(R/Wbkf) the value of R2 = 0.967.
Źródło:: Journal of Ecological Engineering; 2022, 23, 9; 44--52
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Impact of Hydrologic Characteristics of Mountain Watersheds on Geometric and Hydraulic Parameters of Natural Torrent Beds
Autorzy:: Jakubis, Matúš
Jakubisová, Mariana
Powiązania:: https://bibliotekanauki.pl/articles/124393.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water balance equation
stream morphogenesis
High Tatras
Slovakia
Opis:: The aim of the paper is to determine the geometric and hydraulic characteristics of natural torrent beds and to propose a regional hydraulic geometry equations of mountain watersheds for the High Tatras region. The research was conducted in 26 natural torrents and their watersheds on the reference sections and profiles under the sediment source zones. Two different regression equations to determine the relationships of hydraulic geometry (hitherto used without asymptote and newly proposed with asymptote) were compared. The analyses showed a strong correlation relationship between watershed area A_w (km²) and bankfull geometric characteristics of natural cross-sections: width of the bed inside the banks B_bf (m), mean depth of the bed H_bf (m), channel cross-section area A_bf (m²) and hydraulic characteristic – bankfull discharge Q_bf (m³.s^-1). The results were tested by t-test and Shapiro-Wilk test. The determination coefficient (R²) for the relationships without asymptote ranged between R² = 0.919 and R² = 0.972; p – values from Shapiro – Wilk test ranged between p = 0.0359 and p = 0.8027. The determination coefficient (R²) for the relationships with asymptote ranged between R² = 0.952 and R² = 0.974; p – values from Shapiro – Wilk test ranged between p = 0.0221 and p = 0.8617. Based on the analysis we found that the new equation with the asymptote provides very good results.
Źródło:: Journal of Ecological Engineering; 2019, 20, 3; 13-23
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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