Table 3 The \({k}_{m}\) and \({h}_{m}\) parameters obtained from the model and theR2, RMSE and NSE of the measured concentration and the simulated data.

From: Mathematical model of ammonium nitrogen transport with overland flow on a slope after polyacrylamide application

Rainfall intensity (mm h−1)

PAM (g·m−2)

\({k}_{m}\) (m·min−1)

\({h}_{m}\) (mm)

R 2

RMSE

NSE

50

0

0.071

18.28

0.89

0.59

0.88

1

0.055

13.35

0.99

0.11

0.99

2

0.066

8.81

0.99

0.08

0.99

4

0.079

7.85

0.95

0.37

0.94

80

0

0.079

21.38

0.85

0.30

0.85

1

0.069

17.60

0.79

0.24

0.79

2

0.056

12.65

0.90

0.15

0.90

4

0.080

9.32

0.91

0.16

0.91