Groundwater Vulnerability and Protectability to Chernobyl-Born Radionuclide - Groundwater Vulnerability: Chernobyl Nuclear Disaster - page 85

8

6

4

2

0

0 400 800 1200

Number of depressions

1600 2000

Figure 5.3 Plot for the ratio К с of total depression area identified by the map on a scale of
10,000 to that of 1:50,000 on depression number per standard map sheet of 1:50,000.

standard map sheet area in the scale 1:50,000) for the studied territory of the Kyiv
region was drawn (shown in Figure 5.4). According to this scheme, the areal share
of depressions increases from 0% in the southern part to 10-15% in the eastern
part of the region.
Returning to the PFMZ classification given in Chapter 3, it is worth noting
that the depression-related PFMZ characteristics of plain areas described here
along with the gullies and ravines characteristic of the dissected relief range in
linear dimension from 10 to 10 3 m, so they can be categorized as mesozones
and microzones. The PFMZs with dimensions of 10 3 -10 5 m (macrozones and
megazones) are taken into account in the course of preliminary area zoning on
a scale of 1:50,000 and in part on a scale of 1:20,000. The PFMZs with
dimensions ranging from 10 −2 to 10 m (femtozones, picozones, and nanozones)
are in most cases implicitly taken into consideration by the groundwater sam-
pling procedure.
In the same way the assessment can be implemented for PFMZs associated
with linear geodynamical zones (lineaments).