The impact of extreme hydro-meteorological events on the transformation of mountain river channels (Polish Flysch Carpathians)

Kijowska-Strugała, Małgorzata; Wiejaczka, Łukasz; Gil, Eugeniusz; Bochenek, Witold; Kiszka, Krzysztof

doi:10.1127/zfg/2017/0434

Cited by 15 publications

(9 citation statements)

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“…The Bystrzanka catchment is one of the examples. During two heavy rainfall events, recorded in 2010 (which resulted in flash floods), 96% of the average yearly suspended sediment load, were carried out from the catchment, and man-origin incisions played an important role in delivering and transportation of suspended material to the main stream (Kijowska-Strugała et al 2017). During the second flash flood, the suspended sediment load concentration, recorded at the mouth of the catchment reached 44 g dm 3 , and it was the highest value recorded during the last 40 years (Kijowska-Strugała 2015).…”

Section: Changes In the Surface Drainage System And Their Consequencementioning

confidence: 99%

Reconstruction and characterization of the surface drainage system functioning during extreme rainfall: the analysis with use of the ALS-LIDAR data—the case study in two small flysch catchments (Outer Carpathian, Poland)

Bryndal¹,

Kroczak²

2019

Environ Earth Sci

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A surface drainage system (SDS) controls catchment hydrology and acts as an indicator of geomorphologic processes. In this study, a field-based and GIS-integrated approach enabling reconstruction of a surface drainage system, which operates during heavy rainfall in small flysch catchments, has been proposed. The reconstruction is based on the ALS-LIDAR data. The reconstruction of the SDS gave the opportunity for analysis of the changes between the river system and the SDS operating during heavy rainfalls. Results have revealed that the SDS operating during heavy rainfalls is several times better developed than the river system. The density has increased from c.a. 1.5 to 13.7 km·km − 2 . Moreover, the structure of the SDS has changed, what was confirmed by the parameters of the Hortonian type of the analyses. The most significant changes were related to the first-and second-order streams. These streams were, the most frequently, the man-origin incisions and natural-origin incisions/concavities on the hillslopes conditioned by micro-relief. The man-origin sub-system reached up to 35% of the SDS functioning during heavy rainfalls, whereas the sub-system composed of incisions/concavities conditioned by micro-relief reached up to 24% of this SDS. Smaller lateral valleys included to the SDS during heavy rainfalls constitute up to 37% of the SDS. The permanent streams constitute the remaining part of the SDS. Changes in the SDS have the influence on the drainage pattern, hydrological response of a catchment, and intensity of geomorphological processes; therefore, the changes in the SDS and their consequences have been discussed.

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Section: Changes In the Surface Drainage System And Their Consequencementioning

confidence: 99%

Reconstruction and characterization of the surface drainage system functioning during extreme rainfall: the analysis with use of the ALS-LIDAR data—the case study in two small flysch catchments (Outer Carpathian, Poland)

Bryndal¹,

Kroczak²

2019

Environ Earth Sci

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“…We wszystkich badanych zlewniach trendy czasu trwania przepływów niżówkowych były nieistotne statystycznie. Główna przyczyną jest duża czasowa zmienność natężenia przepływu w Karpatach Zachodnich w kolejnych latach (Punzet, 1996;Soja, 2002 Kijowska-Strugała, 2015;Bochenek, 2017;Kijowska-Strugała et al, 2017;Bochenek, 2019;Kijowska-Strugała i Bucała-Hrabia, 2019). W analizowanych zlewniach pogórskich roczny deficyt odpływu niżówki głębokiej był niższy o 66% niż w zlewniach beskidzkich, w których obserwowano kilkuletnie okresy wzrostu i spadku niedoboru odpływu.…”

Section: Dyskusjaunclassified

Zmienność przepływów niżówkowych w wybranych zlewniach pogórskich i beskidzkich w latach 1988‑2017 = Variability of low flow in Polish Carpathians (foothills and Beskidy Mountains) catchments in the period 1988‑2017

Bochenek

Kijowska-Strugała

2021

Prz. Geogr.

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Water flow in the Polish Carpathians was exemplified by long-term (1988‑2017) analysis of two foothill catchments (of the Skawinka and Stobnica) and two catchments in the Beskidy Mountains (of the Soła and Osława). The work allowed for the determination of the duration of low flows and outflow deficits in relation to changes in thermal and precipitation conditions, as well as land use and land cover. In the selected catchments, the 30-year period brought a decrease in the area of arable land and an increase in the area of grassland and forest. In addition built-up areas increased by 495% between 1990 and 2018. A greater susceptibility to the occurrence of total drought was noted for the Beskidy Mountains catchments, in which the duration of low flows and outflow deficit was greater than in the foothill catchments. At the same time, the mountain catchments proved less susceptible to the emergence of deep drought, on account of their higher levels of forest cover and levels of soil permeability. In regional terms, the durations of low flows and outflow deficits were greater in the catchments located in the eastern part of the Carpathians (those of the Stobnica and Osława), in line with this area’s intensified features of a continental climate.

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“…Dams impose changes of flow and sediment transfer that drive changes of channel form along the downstream regulated river [22]. In the river channels above dams there is an intense accumulation of sediments, while below due to erosion there is a degradation of and dredging of the riverbed [23,24,25]. The Teesta river transports a large number of sediments, exploited in many places by local communities after the flood period [26].…”

Section: Human Interference In the Morphology Of Himalayan Riversmentioning

confidence: 99%

Human Impact on the River Channels Morphology in the Himalayas and Its Piedmont (India)

Wiejaczka¹

2019

Proceedings 2019

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The aim of the study is the presentation of the directions and scale of changes in the morphology of the Himalayan and its piedmont river channels occurring under the contemporary influence of human activity. The study uses the results of morphological field research conducted in the Teesta river basin (right tributary of the Brahmaputra) in the period 2011-2015. The research shows that one of the most common anthropogenic form affecting banks of the Himalayan channels is their reinforcement and reprofiling related to bridges and dams construction. In turn, on the Himalayan piedmont, the most visible human influence is massive extraction of riverbed sediments what leads to the deepening of river channels. The morphological changes of channels caused by human interference deteriorates the quality of the rivers habitat and affects human communities dependent on rivers ecosystem services.

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The impact of extreme hydro-meteorological events on the transformation of mountain river channels (Polish Flysch Carpathians)

Cited by 15 publications

References 0 publications

Reconstruction and characterization of the surface drainage system functioning during extreme rainfall: the analysis with use of the ALS-LIDAR data—the case study in two small flysch catchments (Outer Carpathian, Poland)

Reconstruction and characterization of the surface drainage system functioning during extreme rainfall: the analysis with use of the ALS-LIDAR data—the case study in two small flysch catchments (Outer Carpathian, Poland)

Zmienność przepływów niżówkowych w wybranych zlewniach pogórskich i beskidzkich w latach 1988‑2017 = Variability of low flow in Polish Carpathians (foothills and Beskidy Mountains) catchments in the period 1988‑2017

Human Impact on the River Channels Morphology in the Himalayas and Its Piedmont (India)

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