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Table 1

The rating and weight values of DRASTIC and DRASTIC-LU models

ParametersRangeRatingWeight
D (m) 0–2 10 
2–4 
4–8 
8–12 
>12 
R (mm/y) >200 
150–200 
100–150 
50–100 
0–50 
A Limestone with intercalation of shale and granulite 
Quaternary sediments 
Metamorphic rocks 
Clastic rocks, thin-layer metamorphic rocks 
Granite, gneiss 
S Sand loam 
Silt loam 
Clay loam 
T (%) 0–2 10 
2–6 
6–12 
12–18 
>18 
I Gravel, coarse sand with gravel 
Sand 
Sand with clay 
Bedrock 
C (m/d) 0–5 
5–10 
10–20 
20–30 
>30 10 
LU Agricultural area 
Water body 
Built-up area 
Land for transportation 
Tree-clad area 
ParametersRangeRatingWeight
D (m) 0–2 10 
2–4 
4–8 
8–12 
>12 
R (mm/y) >200 
150–200 
100–150 
50–100 
0–50 
A Limestone with intercalation of shale and granulite 
Quaternary sediments 
Metamorphic rocks 
Clastic rocks, thin-layer metamorphic rocks 
Granite, gneiss 
S Sand loam 
Silt loam 
Clay loam 
T (%) 0–2 10 
2–6 
6–12 
12–18 
>18 
I Gravel, coarse sand with gravel 
Sand 
Sand with clay 
Bedrock 
C (m/d) 0–5 
5–10 
10–20 
20–30 
>30 10 
LU Agricultural area 
Water body 
Built-up area 
Land for transportation 
Tree-clad area 
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