Table 7 Overall mean error (ME), mean absolute error (MAE), root mean square error (RMSE), and R-squared value for groundwater level, and TDS, nitrate, and fluoride contamination.

From: Groundwater contamination modelling in Ayad River Basin, Udaipur

Items

Total number of wells

Overall mean error (ME)

Mean absolute error (MAE)

Root mean square error (RMSE)

R-squared value

Groundwater monitoring wells (m)

45

9.32

9.53

12.40

0.989

TDS contamination (mg/l)

8

0.83%

1.30%

1.62%

0.991

Nitrate contamination (mg/l)

8

0.60%

1.89%

2.28%

0.993

Fluoride contamination (mg/l)

8

0.71%

1.38%

1.46&

0.957

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