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UKFE (version 0.2.3)

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 11. 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). "Proposal of the extreme rank plot for extreme value analysis: with an emphasis on flood frequency studies", Hammond (2019, ). "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, ). "Improving the FEH statistical procedures for flood frequency estimation", Environment Agency (2008, ISBN: 978 1 84432 920 5). "Low flow estimation in the United Kingdom", Institute of Hydrology (1992, ISBN 0 948540 45 1). Wallingford HydroSolutions, (2016, ). Data from the UK National River Flow Archive (, terms and conditions: ).

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Version

Install

install.packages('UKFE')

Monthly Downloads

325

Version

0.2.3

License

GPL-3

Maintainer

Anthony Hammond

Last Published

October 1st, 2022

Functions in UKFE (0.2.3)

Extreme value plot (frequency and growth curves)

Design hydrograph extraction

Donor adjustment candidates & results

Encounter probabilities

Linearly detrend a sample

Extreme rank plot

DDF99 parameters from .xml files

Add lines and/or points to an extreme value plot

Extreme value plot for pooling groups

Diagnostic plots for pooling groups

Generalised logistic distribution - estimates directly from sample

Generalised logistic distribution estimates from parameters

Generalised logistic distribution growth factors

Generalised extreme value distribution - estimates directly from sample

Generalised logistic distribution parameter estimates

Generalised Pareto distribution parameter estimates

Generalised Pareto distribution - estimates directly from sample

Generalised Pareto distribution estimates from parameters

Hydrological plot of concurrent discharge and precipitation

Generalised Pareto distribution growth factors

Adjust L-Ratios in a pooling group

Kappa3 distribution growth factors

Linear Kurtosis (LKurt)

Generalised extreme value distribution growth factors

Generalised extreme value distribution parameter estimates

Lmoments & Lmoment ratios

Linear Skewness (LSkew)

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

Peaks over threshold (POT) data extraction

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

Gumbel distribution estimates from parameters

Gumbel distribution growth factors

British national grid reference (NGR) distances

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

Urban adjustment for the linear skewness (LSkew)

Goodness of tail fit (GoTF) for pooling groups

Generalised extreme value distribution estimates from parameters

Permeable Adjustment

Optimise distribution parameters

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

Gumbel distribution - estimates directly from sample

Gumbel distribution parameter estimates

Seasonal correction factor (SCF)

Stage-Discharge equation optimisation

Heterogeneity measure (H2) for pooling groups.

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

QMED donor adjustment

QMED from a gauged site suitable for QMED

Urban adjustment factor (UAF) and percentage runoff urban adjustment factor (PRUAF)

Trend hypothesis test

Create pooling group

QMED Linking equation

Pooled flood estimates

QMED factorial standard error for gauged sites

Site gauged linear coefficient of variation (Lcv) weightings

Quick pooled results

Site gauged linear skewness (LSkew) weightings

Ungauged pool weighted linear skewness (LSkew)

Ungauged pool weighted linear coefficient of variation (Lcv)

Uncertainty for the single site

Uncertainty quantification for gauged and ungauged pooled estimates

Revitalised Flood Hydrograph Model (ReFH)

Site ungauged linear coefficient of variation (Lcv) weightings

Urban adjustment for the linear coefficient of variation (Lcv)

Goodness of tail fit (GoTF).

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

Site ungauged linear skewness (LSkew) weightings

Linear coefficient of variation (Lcv)

Gauged pool weighted linear skewness (LSkew)

Gauged pool weighted linear coefficient of variation (Lcv)

Zdist Goodness of fit measure for pooling groups

Create pooling group for small catchments

QMED (median annual maximum flow) estimate from catchment descriptors

Import catchment descriptors from .xml files

DDF13 results from a DDF13Import object

Areal reduction factor (ARF)

Annual maximum extraction

Plot of the annual maximum sample

DDF13 results from .xml files

FEH99 depth duration frequency precipitation model

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

National River Flow Archive (NRFA) annual maximum data for sites suitable for pooling

Baseflow index (BFI)