Geoscience Reference
In-Depth Information
Fig. 1 Functional plan of the Złotniki storage reservoir
2 The Kwisa River
The Kwisa River is a left-sided tributary of the B
´
br River, with its mouth in 87.01 km.
The headspring of the Kwisa River is on the hillside of the Wysoki Grzbiet,
at the Przednia Kopa slope foot, at a height of about 900 m asl. The Kwisa River
up to Le
´
na cross section flows through two basic geographical regions: the Izery
Mountains and the Izery Foothills. The catchment area to the Złotniki dam cross
section equals 288.14 km
2
. The river length on that section is equal to about 36.2 km,
and the average slope of catchment is about 3.5% in mountain and about 1% on
foothills. Rivers and watercourses in the upper Kwisa River catchment are supplied
in waters mainly from rain in summer season and from snow in winter season.
The nature of water supply causes two maximum discharges from the catchment,
summer (mainly July-September) and winter (mainly February-March), within a
hydrological year. Summer freshets are the biggest in size and magnitude in
comparison with winter freshets (Radczuk and Olearczyk
2006
). A hydrographical
network in the upper Kwisa River catchment is well developed. A drainage density is
about 0.74 1 km
1
.
