hydromt.stats.skills.nashsutcliffe#

hydromt.stats.skills.nashsutcliffe(sim, obs, dim='time')[source]#

Return the Nash-Sutcliffe model efficiency.

Efficiency is based on a simulated and observed time series.

\[\begin{split}NSE = 1-\\frac{\\sum_{i=1}^{N}(sim_{i}-obs_{i})^2} {\\sum_{i=1}^{N}(obs_{i}-\\bar{obs})^2}\end{split}\]

Parameters:

sim (xarray DataArray) – simulations time series
obs (xarray DataArray) – observations time series
dim (str, optional) – name of time dimension in sim and obs (the default is ‘time’)

Returns:

the Nash-Sutcliffe model efficiency

Return type:

xarray DataArray