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| Titel |
Characteristics of Winters Conditions and Floods in Small, Lowland River Catchment |
| VerfasserIn |
Agnieszka Hejduk, Leszek Hejduk |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250093884
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| Publikation (Nr.) |
 EGU/EGU2014-9047.pdf |
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| Zusammenfassung |
| Characteristics of thermal and snowy conditions of winters and winter floods recorded at
Czarna gauging station on Zagożdżonka River (central Poland) are given in the paper. The
catchment area till Czarna station is 24.3 km2, but to direct runoff and sediment delivery to
river system contributes 19.6 km2 . The mean annual precipitation and runoff are estimated at
606 mm and 107 mm respectively. The snow cover usually appears between 25–30 of
November and disappears between 20–25 of March. Land use in the catchment upstream of
Czarna is dominated by arable land (70 percent). 20 percent of area is covered by forest, 9.4
percent is pastures and 0.6 percent is paved areas. Based on maximum, minimum, mean
diurnal air temperatures and daily snow cover depth, thermal and snow conditions of winters
have been characterized by using empirical indexes proposed by Paczos (Paczos,
1982, 1985). Rather cold and extraordinarily low snowy winters has dominated
in Zagożdżonka catchment. There is a significant statistical relationship between
winter snowiness index (WSn) and winter severity index (WOz ) with R=0.83, α
= 0.05. Water discharge, rainfall and air temperature have been used to identify
snowmelt periods and catchment response on water supply. Winter floods as a result of
snowmelt have been observed almost each year. The total supply of analyzed cases
varied from 69.3 to 10 mm, the peak discharge varied from 0.114 to 3.44 m3/s .
Catchment response under different thermal and snowy conditions of winters varied
from droughts to floods. There is statistical significant relation between maximum
water discharge and snowiness conditions expressed by WSn index (R=0.66, α=
0.05).
The investigations were carried on within the research project funded by National Science
Center
References: PACZOS S., 1982. Stosunki termiczne i śnieżne zim w Polsce. Unpublished
dissertation, UMCS, Lublin
PACZOS S., 1985. Zagadnienia klasyfikacji zim w świetle różnych kryteriów
termicznych. Annales UMCS, 40,7, str. 133-155 |
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