Autor: Witek, P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Modelling of small river deltas : the dependence of morphology on grain size and discharge
Autorzy:: Witek, P.
Czechowski, L.
Misiura, K.
Powiązania:: https://bibliotekanauki.pl/articles/2060519.pdf
Data publikacji:: 2016
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: hydrology
sedimentology
river deltas
numerical modelling
Opis:: We studied the dependence of the morphology of small river deltas on the grain size, the total discharge, and the slope of the deposits. We use Computational Fluid Dynamics (CFD) methods of numerical modelling. For all models we used the same initial geometry of the river valley and a portion of the lake. Our simulations show the expected dependence of the shape of our simulated small deltas on the grain size. Moreover, we find that the final type of delta could be characterized by the average slope in the region close to the delta front.
Źródło:: Geological Quarterly; 2016, 60, 4; 975--980
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: The formation of single-channel and multiple-channel rivers on large slopes
Autorzy:: Misiura, K.
Czechowski, L.
Witek, P.
Bendiukova, A.
Powiązania:: https://bibliotekanauki.pl/articles/2060527.pdf
Data publikacji:: 2016
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: river classification
multiple channel rivers
single channel river
sedimentation
Opis:: We investigated the formation of different types of rivers depending on slope, total discharge, and grain size. Calculations were performed using numerical package CCHE2D, developed by the National Center for Computational Hydroscience and Engineering. The model is based on the Navier-Stokes equations for depth-integrated two-dimensional turbulent flow and the three-dimensional convection-diffusion equation of sediment transport. For each model we use the same river geometry, suspended load concentration, and bedload transport rate. We distinguish three types of rivers using two methods for classification (single-channel, multiple-channels and transitional). We found that the trend line for transitional rivers is an increasing function of Q in space (Q, d) and that for large S the number of multichannel rivers decreases.
Źródło:: Geological Quarterly; 2016, 60, 4; 981--989
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

Artykuł

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