Krasnodar GRES Project Volume I11 Environmental Assessment

the east, it
land slides,
deposits on
turns into a low, slightly hilly valley characterized by numerous
resulting from the occurrence of water impermeable Maikop
confining beds of the same age.
II. The cumulative (riverine) relief forms include alluvial deposits of the Laba
and Khodz rivers as well as their tributaries. The basic accumulation of
deposits include pebble, conglomerates and cover loams of terrace
plantation surfaces. Classic material, which forms the pebble terraces of the
Laba and Khodz rivers, is transported from a zone of the Main Caucasian
Range and Caucasian piedmont ridges, cut by these rivers (Peredovoy,
Skalisty, Pastbishchny Ridges).
Dzhemitmesskie Heights and Pastbishchny Ridge make up the area, from
where the clastic material of small rivers and gullies is carried off in this
region.
Ila. The flood plain of the Laba and Khodz rivers is composed of sandy-pebble
formations, ranging from sandy-clay particles and pebbles of medium size to
large boulders and separate blocks. Terrace benches are most widespread
along ravine valleys and tributaries of the main rivers. Terrace benches are
observed, as a rule, in the lower stream and as an exception in the central.
On the whole, terraces in the valleys of deeply cut gullies are observed only
as separate spots. Preserved in the areas of river basin expansion. The
height of the flood plain in the valleys of the Laba and Khodz rivers varies
from 0.5 to 2 m and up to 3 m of the high flood plain. The flood plain
surface is almost level with a slight slope towards the river channel and is
covered with a poorly developed soil layer.
Oxbows and marshes are often observed on the surface of a high flood
plain.
Ilb. The first terrace above the flood plain of the Laba and Khodz rivers. Within
the area under consideration, the first terrace above the flood plain plays
the basic role in the structure of the valleys of these rivers. It is universal in
this area. And only on the left bank of the Khodz river it is observed in the
form of separate spots due to the fact that in some areas the river washes
off bed rock outcrops of Maikop and Torkhasky as well as Chokraksky
horizons. The surface of these terraces have small hills and mounds up 2.7
m high. A number of secondary forms of relief encountered in different
morpho-genetic types also occur in this region.
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