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UKFE (version 2.0.0)

UK Flood Estimation

Description

Functions to implement the methods of the Flood Estimation Handbook (FEH), associated updates and the revitalised flood hydrograph model (ReFH). Currently the package uses NRFA peak flow dataset version 14. Aside from FEH functionality, further hydrological functions are available. Most of the methods implemented in this package are described in one or more of the following: "Flood Estimation Handbook", Centre for Ecology & Hydrology (1999, ISBN:0 948540 94 X). "Flood Estimation Handbook Supplementary Report No. 1", Kjeldsen (2007, ISBN:0 903741 15 7). "Regional Frequency Analysis - an approach based on L-moments", Hosking & Wallis (1997, ISBN: 978 0 521 01940 8). "Making better use of local data in flood frequency estimation", Environment Agency (2017, ISBN: 978 1 84911 387 8). "Sampling uncertainty of UK design flood estimation" , Hammond (2021, ). "The FEH 2025 statistical method update", UK Centre for Ecology and Hydrology (2025). "Low flow estimation in the United Kingdom", Institute of Hydrology (1992, ISBN 0 948540 45 1). Data from the UK National River Flow Archive (, terms and conditions: ).

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Version

Install

install.packages('UKFE')

Monthly Downloads

240

Version

2.0.0

License

GPL-3

Maintainer

Anthony Hammond

Last Published

October 28th, 2025

Functions in UKFE (2.0.0)

Extreme value plot (frequency and growth curves)

Import catchment descriptors from older .xml files

Generalised extreme value distribution estimates from parameters

Generalised Pareto distribution - estimates directly from sample

Generalised Pareto distribution parameter estimates

Donor adjustment candidates

Extreme rank plot

Generalised logistic distribution estimates from parameters

Generalised logistic distribution - estimates directly from sample

Get catchment descriptors from the National River Flow Archive sites considered suitable for median annual maximum flow estimation (QMED) and pooling.

Extreme value plot for pooling groups

Encounter probabilities

Generalised logistic distribution parameter estimates

Generalised logistic distribution growth factors

Get an annual maximum sample from the National River Flow Archive sites suitable for pooling

Gumbel distribution growth factors

Goodness of fit comparison (single sample)

Goodness of fit comparison (for a pooling group)

Generalised extreme value distribution growth factors

Generalised Pareto distribution growth factors

Convert between British National Grid Reference (BNG) and Latitude and Longitude or Irish Grid references.

QMED from a gauged site suitable for QMED

Add lines and/or points to an extreme value plot

Generalised Pareto distribution estimates from parameters

Get Scottish Environment Protection Agency (SEPA) Flow, Level, or Rainfall data.

Get flow or level data from the Environment Agency's Hydrology Data Explorer

Kappa3 distribution estimates from parameters

Kappa3 distribution - estimates directly from sample

Urban adjustment for the linear coefficient of variation (Lcv)

Hydrological plot of concurrent discharge and precipitation

Get Environment Agency rainfall data (England).

Linear Skewness (LSkew)

Gumbel distribution parameter estimates

FlowDurationCurve

Flow duration curve

National River Flow Archive descriptors and calculated statistics for sites suitable for QMED & pooling

Peaks over threshold (POT) data extraction (quick)

Linear coefficient of variation (Lcv)

Get National River Flow Archive data using gauge ID.

GetDataMetOffice

Get regional Met Office average temperature or rainfall series (monthly, seasonal, and annual).

Peaks over threshold (POT) data extraction

Seasonal correction factor (SCF)

Optimise distribution parameters

Seasonality plot

Linear Skewness (LSKEW) weightings for a pooling group

Linear coefficient of variation (Lcv) weightings for a pooling group

Heterogeneity measure (H2) for pooling groups.

Kappa3 distribution parameter estimates

Generalised extreme value distribution parameter estimates

Historic flood maximum likelihood estimation

Linear Kurtosis (LKurt)

Quick pooled results

QMED factorial standard error for gauged sites

Create pooling group

Lmoments & Lmoment ratios

Adjust L-Ratios in a pooling group

Kappa3 distribution growth factors

Non-flood adjustment

NonFloodAdjPool

Non-flood adjustment for pooling groups

Pooled flood estimates

Urban expansion factor

Kingston upon Thames daily flow and catchment precipitation 2000-10-01 to 2015-09-30

WeightedMoments

Weighted Lmoment ratios (LCV and LSKEW) from a pooling group

Uncertainty quantification for gauged and ungauged pooled estimates

Trend hypothesis test

Urban adjustment factor (UAF)

QMED donor adjustment

QMED (median annual maximum flow) estimate from catchment descriptors

Empirical estimate of QMED from peaks over threshold (POT) data

QMED Linking equation

Zdist Goodness of fit measure for pooling groups

Monthly Statistics

Stage-Discharge equation optimisation

Gumbel distribution - estimates directly from sample

British national grid reference (NGR) distances

Revitalised Flood Hydrograph Model (ReFH)

Gumbel distribution estimates from parameters

Import an annual maximum (AMAX) sample from NRFA peak flow .am files

Areal reduction factor (ARF)

Plot of the annual maximum sample

Aggregate a time series

National River Flow Archive (NRFA) annual maximum peak flow data for sites suitable for QMED only, and those for pooling.

Baseflow index (BFI)

Annual statistics extraction

Import catchment descriptors from .xml files

Add an AMAX sample

Diagnostic plots for pooling groups

Design hydrograph extraction

FEH99 depth duration frequency precipitation model

DDF results from a DDFImport object

DDF99 parameters from .xml files

DDF13 or DDF22 results from .xml files

Linearly detrend a sample

Generalised extreme value distribution - estimates directly from sample

Derive and plot rainfall Depth Duration Frequency curves.