This function reads a streamflow dataset and produces a baseflow dataset. It can be run using 1, 2 or 3 passes
BaseflowSeparation(streamflow, filter_parameter = 0.925, passes = 3)
A vector containing streamflow values
The value recommended by Nathan and McMahon (1990) is 0.925, however, the user might want to play with this value (0.9-0.95)
The number of times you want the filter to pass over your data. 1-3
This will return a 2 column data frame with nrow = length of input streamflow data. The first column contains baseflow, while the second contains quickflow, both in the same units as the input.
Lyne, V. D. and M. Hollick (1979). Stochastic time-variable rainfall-runoff modelling. Hydrology and Water Resources Symposium, Perth, Institution of Engineers, Australia.
Nathan, R. J. and T. A. McMahon (1990). "Evaluation of automated techniques for base flow and recession analysis." Water Resources Research 26(7): 1465-1473.
1 2 3 4 5 6 7 8 9
######### Look at a dataset for Owasco Lake in NY: data(OwascoInlet) summary(OwascoInlet) ## Get an approximation for baseflow using a 3 pass filter: bfs<-BaseflowSeparation(OwascoInlet$Streamflow_m3s, passes=3) ## You can check out how this looks with the hydrograph function: hydrograph(input=OwascoInlet,streamflow2=bfs[,1])
Loading required package: operators Attaching package: 'operators' The following objects are masked from 'package:base': options, strrep Loading required package: topmodel Loading required package: DEoptim Loading required package: parallel DEoptim package Differential Evolution algorithm in R Authors: D. Ardia, K. Mullen, B. Peterson and J. Ulrich Loading required package: XML date P_mm Streamflow_m3s baseflow_m3s Min. :2009-04-22 Min. : 0.000 Min. : 0.310 Min. : 0.000 1st Qu.:2009-11-29 1st Qu.: 0.000 1st Qu.: 1.590 1st Qu.: 1.329 Median :2010-07-09 Median : 0.000 Median : 3.060 Median : 2.516 Mean :2010-07-17 Mean : 3.121 Mean : 4.647 Mean : 3.212 3rd Qu.:2011-03-16 3rd Qu.: 2.540 3rd Qu.: 5.077 3rd Qu.: 3.960 Max. :2011-10-26 Max. :112.522 Max. :56.350 Max. :15.737 Tmax_C Tmin_C Min. :-12.220 Min. :-26.110 1st Qu.: 8.193 1st Qu.: -1.670 Median : 18.330 Median : 6.670 Mean : 15.977 Mean : 5.059 3rd Qu.: 25.000 3rd Qu.: 12.220 Max. : 36.670 Max. : 23.330
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.