202
J. Kubiak and S. Machula
Table 9.1
Factors for estimation of lake catchment as biogenic matter suppliers by Bajkiewicz-Grabowska [58, 104, 107] and Bajkiewicz-Grabowska et al.
[108]
Indicator
Punctation (groups)
0
1
2
3
Lake density coefficient
<10
10–40
40–150
>150
Balance type
Drain
Outflow
Flow-through
Density of river network
<0.5
0.5–1.0
1.0–1.5
>1.5
Mean slope of direct catchment <5
5–10
10–20
>20
Closed drainage area of direct
catchment
>60
45–60
20–45
<20
Geological structure of direct
catchment
Clay
Sandy-clay
Clay-sandy
Sandy
Catchment use Direct catchment
use
Forest, marsh,
agriculture-forest,
pasture-agricultural-forestry
Forestry-agricultural,
pasture-agricultural
Agricultural,
pasture-forestry-agricultural
with buildings, forest with
buildings
Forest—agricultural with
buildings,
pasture—agricultural with
buildings, agriculture with
buildings