Abstract
In the article we analyzed series of hydro-geomorphological indicators and their distribution between the limits of geomorphological districts and areas in the mountainous part of the basin river Bystrica Nadvirnianska in the Ukrainian Carpathians, which is located within the four geomorphological regions of the Vododilno-Verhovinsky and Skybovyh (Outer) Carpathians. We considered the following indicators: the order of streams, the number of streams, the total length of streams, the mean length of flows, the ratio of flow length, the bifurcation ratio, the density of the river network and the frequency of flows. It was established that the total number of flows significantly differs between geomorphological regions due to their share of areas in the research basin. In the area of low-mountainous relief Skibovyh Gorgany there are 159 streams, in the area of the Medieval relief of the Skibovyh Gorgany – 869, Vorokhta-Putilskyy erosional lowland – 317, Privodidilnyh Gorgan – 62. The total length of the flows has the following distribution in the geomorphological regions: low-mountainous relief Skibovyh Gorgany – 162,4 km, Middle-earth relief Skybovyh Gorgany – 705,8 km, Vorokhta-Putila erosion lowland – 204,4 km, Privodidilnyh Gorgan – 39,5 km. The greatest value of the frequency of flows is in the geomorphological area of the Vorokhta-Putyla erosion lowland (3,8), the least – in the Low-mountainous relief of the Skibovyh Gorgany (1,74). The density of the river network can be best illustrated by the density ratio of the river network. Its maximum value is 2,5 km/km2 in the Vorokhta-Putyla erosion lowland, and the minimum – 1,6 km/km2 in the Privodidilni Gorgany.The mean length of the streams has bigger values in the geomorphological area of the Skybkovy Carpathians (0,84 km), in particular, in the Lowland Skybovyh Gorgany – 1,02 km, in the Middle Highland of the Skybovyh Gorgany – 0,81 km. Somewhat smaller values were recorded in the area of the Vododilovo-Verkhovyna Carpathians (0,64 km), namely, 0,65 km in the Vorokhta-Putyla erosional lowland region and 0,64 km in the area of the Pryvoddylnyh Gorgan. Key words: water streams, river network, the order of streams, geomorphological area, structure of the river Bystrica Nadvirnianska.
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