1. Role of Landslides and Lithology in Within-Year Variability of Stream Runoff in Small Forested Catchments in the Outer (Flysh) Carpathians in Poland.
- Author
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Siwek, Joanna P.
- Subjects
PETROLOGY ,WATERSHEDS ,WATER storage ,RUNOFF ,SANDSTONE ,LANDSLIDES - Abstract
The aim of this research was to recognize the role of landslides and lithology in determining the within-year variability of stream runoff in small forested catchments. The research was conducted in 2022 in three areas located in the Outer Carpathians (Poland). In each of three areas, two small catchments were selected: a catchment with landslides and a control catchment. The presence of landslides increases the within-year variability of stream runoff: the degree of increase depends on the lithology of the catchment and the properties of landslides. These two factors determine the water storage capacity of the catchments. The greatest variability in stream runoff occurs in the catchment where impermeable shale dominates in lithology and landslides are numerous but relatively small. Smaller differences occur in the catchment mainly formed of thin-bedded sandstone, where there is one medium-sized landslide covering about 30% of the catchment area. The smallest differences occur in the catchment formed mainly of thick-bedded sandstone, where the entire landslide catchment is found within one large landslide. The size of landslides determines their depth, and consequently, the depth of landslide fissures: the deeper the system of landslide fissures, the longer the water transit time, and the greater the catchment storage capacity. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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