Geoscience Reference
In-Depth Information
Model Investigations of Side Channel
Spillway of the Złotniki Storage
Reservoir on the Kwisa River
Jerzy Machajski and Dorota Olearczyk
1
Introduction
The equivalent tasks of the Złotniki storage reservoir are flood protection of the
downstream Kwisa River Valley and water storing for energetic purposes
(Machajski
2009
; Machajski and Olearczyk
2009
). Installed electric power output
is equal to 4.42 MW, for three turbines with the capacity of 20.29 m
3
s
1
. During
the period of most frequent occurrence of flood waves, that is, July-October, a
permanent flood storage capacity of 1.60 hm
3
is kept in the reservoir. Water surplus
flows through outlet installations, consisting of a diverse channel, two bottom
outlets with diameters of 1,400 and 1,000 mm, and a side channel spillway. Bottom
outlets are built-in dam body from left-sided abutment, whereas two conduits with
1,400 mm diameter each are built-in diverse channel cross section, dividing it into
two sections: pressure section and free flow section. From the basic device of outlet
installation, that is, spillway consisting of two sections of 22.50 m length each,
divided by concrete pillar of 2.0 m width, water outflows downstream through
flume and multistage cascade hewn in the rock massif. At present, the maximum
discharge of outlet installations is equal to 484 m
3
s
1
, from this 380 m
3
s
1
flows
through side channel and cascade. The dam of 36 m height makes a storage
reservoir with the maximum capacity of 12 hm
3
. The dam was built in
1924-1927 and its arch body was made of broken stone in concrete. A functional
plan of the Złotniki dam is shown in Fig.
1
.
