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Table 3

Statistics of absolute errors and percentages for 17 observation wells

Absolute errors (m)Δh≤0.50.5<Δh ≤ 1.01.0<Δh ≤ 3.0Δh>3.0Total
All observation holes Frequency of occurrence 146 107 170 112 535 
Percentage (%) 27.29 20.00 31.78 20.93 100 
Observation holes in plain area Frequency of occurrence 131 98 135 32 396 
Percentage (%) 33.08 24.75 34.09 8.08 100 
Observation holes in mountain area Frequency of occurrence 15 9 35 80 139 
Percentage (%) 10.79 6.48 25.18 57.54 100 
Absolute errors (m)Δh≤0.50.5<Δh ≤ 1.01.0<Δh ≤ 3.0Δh>3.0Total
All observation holes Frequency of occurrence 146 107 170 112 535 
Percentage (%) 27.29 20.00 31.78 20.93 100 
Observation holes in plain area Frequency of occurrence 131 98 135 32 396 
Percentage (%) 33.08 24.75 34.09 8.08 100 
Observation holes in mountain area Frequency of occurrence 15 9 35 80 139 
Percentage (%) 10.79 6.48 25.18 57.54 100 
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