pbiasfdc {hydroGOF} | R Documentation |

Percent Bias in the slope of the midsegment of the flow duration curve (FDC) [%]. It is related to the vertical soil moisture redistribution.

pbiasfdc(sim, obs, ...) ## Default S3 method: pbiasfdc(sim, obs, lQ.thr=0.7, hQ.thr=0.2, na.rm=TRUE, plot=TRUE, verbose=FALSE, ...) ## S3 method for class 'data.frame' pbiasfdc(sim, obs, lQ.thr=0.7, hQ.thr=0.2, na.rm=TRUE, plot=TRUE, verbose=FALSE, ...) ## S3 method for class 'matrix' pbiasfdc(sim, obs, lQ.thr=0.7, hQ.thr=0.2, na.rm=TRUE, plot=TRUE, verbose=FALSE, ...) ## S3 method for class 'zoo' pbiasfdc(sim, obs, lQ.thr=0.7, hQ.thr=0.2, na.rm=TRUE, plot=TRUE, verbose=FALSE, ...)

`sim` |
numeric, zoo, matrix or data.frame with simulated values |

`obs` |
numeric, zoo, matrix or data.frame with observed values |

`lQ.thr` |
numeric, used to classify low flows. All the streamflows with a probability of exceedence larger or equal to |

`hQ.thr` |
numeric, used to classify high flows. All the streamflows with a probability of exceedence larger or equal to |

`na.rm` |
a logical value indicating whether 'NA' values should be stripped before the computation proceeds. |

`plot` |
a logical value indicating if the flow duration curves corresponding to |

`verbose` |
logical; if TRUE, progress messages are printed |

`...` |
further arguments passed to the fdc function of the hydroTSM package or from other methods. |

Percent Bias in the slope of the midsegment of the flow duration curve, between `sim`

and `obs`

.

If `sim`

and `obs`

are matrixes, the returned value is a vector, with the Percent Bias in the slope of the midsegment of the flow duration curve, between each column of `sim`

and `obs`

.

The result is given in percentage (%).

It requires the hydroTSM package.

Mauricio Zambrano Bigiarini <mzb.devel@gmail.com>

Yilmaz, K. K., H. V. Gupta, and T. Wagener (2008), A process-based diagnostic approach to model evaluation: Application to the NWS distributed hydrologic model, Water Resour. Res., 44, W09417, doi:10.1029/2007WR006716

Yilmaz, K. K., H. V. Gupta, and T. Wagener (2008), A process-based diagnostic approach to model evaluation: Application to the NWS distributed hydrologic model, Water Resour. Res., 44, W09417, doi:10.1029/2007WR006716

## Not run: sim <- 1:10 obs <- 1:10 pbiasfdc(sim, obs) sim <- 2:11 obs <- 1:10 pbiasfdc(sim, obs) ################## # Loading daily streamflows of the Ega River (Spain), from 1961 to 1970 data(EgaEnEstellaQts) obs <- EgaEnEstellaQts # Generating a simulated daily time series, initially equal to the observed series sim <- obs # Computing the relative index of agreement for the "best" (unattainable) case pbiasfdc(sim=sim, obs=obs) # Randomly changing the first 2000 elements of 'sim', by using a normal distribution # with mean 10 and standard deviation equal to 1 (default of 'rnorm'). sim[1:2000] <- obs[1:2000] + rnorm(2000, mean=10) # Computing the new relative index of agreement pbiasfdc(sim=sim, obs=obs, col=c("black", "blue")) ## End(Not run)

[Package *hydroGOF* version 0.3-10 Index]