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To compare simulated against observed runoff for Longlands South and Wyke Moor, values were standardized to runoff in m3/ha/day for 2012. Most statistical analyses showed increased error for the Wyke Moor runoff simulation than for Longlands South. Results are shown in Table 3 for the simulated–observed runoff comparisons for 2012, since runoff data were scarce in the drier year of 2013.

Table 3

Statistical analysis of model performance for observed and simulated runoff

 Longlands SouthWyke MoorDayCent model Longlands South
Year201220122012
Field area (ha) 1.75 7.02 1.75 
0.58 0.57 0.99 
RMSE 175% 163% 176% 
EF 0.31 0.31 0.52 
CD 1.85 2.57 0.37 
RE 6.59 27.8 −70.6 
MD 2.94 64.5 −144 
ME 433 1976 1138 
92 92 92 
 Longlands SouthWyke MoorDayCent model Longlands South
Year201220122012
Field area (ha) 1.75 7.02 1.75 
0.58 0.57 0.99 
RMSE 175% 163% 176% 
EF 0.31 0.31 0.52 
CD 1.85 2.57 0.37 
RE 6.59 27.8 −70.6 
MD 2.94 64.5 −144 
ME 433 1976 1138 
92 92 92 

R = correlation coefficient; RMSE = root mean square error; EF = modelling efficiency; CD = coefficient of determination; RE = relative error; MD = mean deviation; ME = maximum error.

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