get_recession_time: Calculate recession time for daily data

In NVE/NVEHYDROTOOLS: Set of R functions for hydrological analysis at NVE

Description

Calculates average recession times in days, based on method described in Skaugen & Onof, 2014. Select a high quantile from the distribution of the observed recessions specified by 'fraction'. Then estimate the recession time as the time needed to empty a linear resevoir to be 1 Skaugen, T. and Onof, C. (2014): A rainfall-runoff model parameterized from GIS and runoff data. Hydrol. Process., 28, 4529-4542.

Usage

get_recession_time(fraction = 0.995, stationnumber = 200011,
  path_dd = "inst/Example_data/Dailydata", active_station = 0,
  d_first = 1880, d_last = 2015, d_exclude = NA)

Arguments

fraction	Quantile of the pdf of recession coefficients lamda used in calculation. A high value is recommended
stationnumber	Station number given as rrmmmmm
path_dd	Path for daily data
active_station	If active station is 1, ignore d_last and use data until end of data period
d_first	First year for extracting recession data
d_last	Last year for extracting recession data
d_exclude	Years to be excluded

Value

recession time in days for the sepcified catchment

Examples

get_recession_time(fraction=0.995,stationnumber=200011, path_dd='inst/Example_data/Dailydata',
active_station=0,d_first=1880,d_last=2015,d_exclude=NA)

NVE/NVEHYDROTOOLS documentation built on May 7, 2019, 6:04 p.m.