Nash Sutcliffe Efficiency Coefficient
The nashsutcliffe efficiency index e f is a widely used and potentially reliable statistic for assessing the goodness of fit of hydrologic models.
Nash sutcliffe efficiency coefficient. The nashsutcliffe model efficiency coefficient nse is used to assess the predictive skill of hydrological models. Sutcliffe efficiency ens minimizing percentage. It is defined as. However it can also be used to quantitatively describe the accuracy of model outputs for other things than discharge such as nutrient loadings temperature concentrations etc.
Nash sutcliffe efficiency indicates how well the plot of observed versus simulated data fits the 11 line. Calibration was performed by trial and error method seeking to maximize objective function coefficient of nash. Sutcliffe efficiency coe which is the most widely used method for evaluating the efficiency of hydrological. Nse indicates how well the plot of observed versus simulated data fits the 11 line.
Also factors that contribute to poor sample values are not well understood. N s e 1 t 1 t q m t q o t 2 t 1 t q o t q o 2. Traditionally the nashsutcliffe efficiency nse nash and sutcliffe 1970 is an often used metric in part because it normalizes model performance into an interpretable scale eq. However a method for estimating the statistical significance of sample values has not been documented.
Nash sutcliffe model efficiency coefficient the nash sutcliffe efficiency nse is a normalized statistic that determines the relative magnitude of the residual variance compared to the measured data variance nash and sutcliffe 1970. Checked by the coefficient of nash. The nash sutcliffe model efficiency coefficient e is commonly used to assess the predictive power of hydrological discharge models. Where t is the total number of time steps qsimt the simulated discharge at time t qobst the observed discharge at time t and the mean observed discharge.
The nash sutcliffe efficiency nse is a normalized statistic that determines the relative magnitude of the residual variance noise compared to the measured data variance information nash and sutcliffe 1970. E 1 y i y i s i m 2 y i y 2 the variables are the same as described above but y i s i m are the predictions from the simulation instead of the y i from a statistical model. The nash sutcliffe model efficiency coefficient e is used to quantify how well a model simulation can predict the outcome variable.