For its entire length, the Dnepr-Donbass canal traverses the bottom lands and primary and secondary terraces `Vvi]>,cg`
of the Orel', Orel'kya, Britai, and Bereka Rivers. Ground water is encountered at a level of from 0.5 to 2-3 8xy8/UBIk0
m below the surface. Ground water appears here and there on the exposed surface at points in depressed areas, tZ]gVgZg
forming stagnant sections. All basic hydraulic structures on the canal are below ground-water level and require XYU5.
dewatering of the foundation pits. * +
T(i
Using methods of deep dewatering, the ground-water level has been lowered by 8-9 m in the foundation pits xe@e#9N$
for the siphons, and by 10.5-17 m in the pumping station pits. The foundation pits for the structures located in ~e =~:IiK/#
bottom lands are surrounded by a cofferdam I0 m wide to protect against flood waters. Here, the seasonal fluctuations &8IBf8
in the ground-water level reach 2-8 m. The pumping station pits were excavated by dry land machines; Xi="gxp$%
while siphon pits were opened by the method of hydromechanization to a depth of 6 m with shaping to the design UyGo0POW
elevation by dry-land machines.
