For its entire length, the Dnepr-Donbass canal traverses the bottom lands and primary and secondary terraces
=]&?(Gq
of the Orel', Orel'kya, Britai, and Bereka Rivers. Ground water is encountered at a level of from 0.5 to 2-3 Nr=ud QA{
m below the surface. Ground water appears here and there on the exposed surface at points in depressed areas, "'h?O*V]u{
forming stagnant sections. All basic hydraulic structures on the canal are below ground-water level and require La48M'u
dewatering of the foundation pits. =A={Dpv[>
Using methods of deep dewatering, the ground-water level has been lowered by 8-9 m in the foundation pits 6NH.!}"G9
for the siphons, and by 10.5-17 m in the pumping station pits. The foundation pits for the structures located in ~e vn|u&}h
bottom lands are surrounded by a cofferdam I0 m wide to protect against flood waters. Here, the seasonal fluctuations nkTH#WTfR
in the ground-water level reach 2-8 m. The pumping station pits were excavated by dry land machines; Z.Lm[$/edn
while siphon pits were opened by the method of hydromechanization to a depth of 6 m with shaping to the design qp 4.XL
elevation by dry-land machines.