Calculation of Low Flow Statistics for Daily Stream Flow Data
Apply an aggregation function seasonally.
Coerce to class 'lfobj'
Convert Object To Class 'xts'
Calculate the base flow of a river
Base Flow Index
Base Flow Plot
Reversed functions for several Extreme Value Distributions
Checks if a Distribution is suited
Create an low flow object for further Low Flow Analysis
Double Mass Curve
Estimate the return period for given quantiles
Fit an extreme value distribution to observations
Estimating populations quantiles of extreme values
Flow Duration Curve
Interpolation NA values in a vector
Identifying Low Flow Periods
Set and retrieve unit of the discharge
Gringorten Plotting Positions
Hydrograph
Extract or guess the Start of a Hydrological Year
Low flow object check for missing values.
Interpolate missing values
tools:::Rd_package_title("lfstat")
Simple Moving Average
Mean Annual Minimum
Mean flow
Report for several stations
Plot time series of deficits
Pooling Procedures of Low Flow Events
Qxx, Q95, Q90, Q70
Recession diagnostic plot
Reads data sheets
Recession Constant
Regional Frequency Analysis
Regional Frequency Analysis
Highlight quantiles/return periods
Seasonal Bar Chart
Seasonality Index
Attribute dates to seasons
Seasonality Ratio
Bar chart of recession length
Define the unit to use in low flow plots
Streamflow Deficit
Streamflow Deficit Plot
Object Summaries
Draw Paths to Points perpendicular to Coordinate Axis
Calculate Low-Flow Quantiles for given Return Periods
Calculate Low-Flow Quantiles for given Return Periods
Create varying thresholds
Compute the water year
The "Manual on Low-flow Estimation and Prediction" (Gustard & Demuth (2009, ISBN:978-92-63-11029-9)), published by the World Meteorological Organisation, gives a comprehensive summary on how to analyse stream flow data focusing on low-flows. This packages provides functions to compute the described statistics and produces plots similar to the ones in the manual.