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UKFE (version 0.2.7)

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

0.2.7

License

GPL-3

Maintainer

Anthony Hammond

Last Published

February 3rd, 2023

Functions in UKFE (0.2.7)

Donor adjustment candidates & results

Design hydrograph extraction

Linearly detrend a sample

DDF99 parameters from .xml files

Extreme value plot for pooling groups

Diagnostic plots for pooling groups

Generalised logistic distribution parameter estimates

Generalised logistic distribution growth factors

Extreme rank plot

Extreme value plot (frequency and growth curves)

Generalised logistic distribution estimates from parameters

Add lines and/or points to an extreme value plot

Generalised logistic distribution - estimates directly from sample

Encounter probabilities

Generalised extreme value distribution parameter estimates

Generalised extreme value distribution growth factors

Goodness of tail fit (GoTF).

QMED from a gauged site suitable for QMED

Generalised Pareto distribution estimates from parameters

Hydrological plot of concurrent discharge and precipitation

Generalised Pareto distribution - estimates directly from sample

Generalised extreme value distribution estimates from parameters

Generalised Pareto distribution parameter estimates

Generalised extreme value distribution - estimates directly from sample

Gumbel distribution parameter estimates

Gumbel distribution growth factors

Gumbel distribution estimates from parameters

Linear Kurtosis (LKurt)

Gumbel distribution - estimates directly from sample

Goodness of tail fit (GoTF) for pooling groups

Generalised Pareto distribution growth factors

Urban adjustment for the linear skewness (LSkew)

Linear Skewness (LSkew)

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

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

Create pooling group for small catchments

Pooled flood estimates

Lmoments & Lmoment ratios

Heterogeneity measure (H2) for pooling groups.

Monthly Statistics

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

British national grid reference (NGR) distances

Stage-Discharge equation optimisation

Quick pooled results

Adjust L-Ratios in a pooling group

Create pooling group

Permeable Adjustment

Peaks over threshold (POT) data extraction

QMED donor adjustment

Optimise distribution parameters

Kappa3 distribution growth factors

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

Trend hypothesis test

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

QMED factorial standard error for gauged sites

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

Uncertainty for the single site

Urban adjustment for the linear coefficient of variation (Lcv)

Linear coefficient of variation (Lcv)

Uncertainty quantification for gauged and ungauged pooled estimates

Site gauged linear skewness (LSkew) weightings

Site gauged linear coefficient of variation (Lcv) weightings

Ungauged pool weighted linear skewness (LSkew)

QMED (median annual maximum flow) estimate from catchment descriptors

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

Gauged pool weighted linear skewness (LSkew)

Gauged pool weighted linear coefficient of variation (Lcv)

QMED Linking equation

Site ungauged linear coefficient of variation (Lcv) weightings

Site ungauged linear skewness (LSkew) weightings

Ungauged pool weighted linear coefficient of variation (Lcv)

Urban expansion factor

Revitalised Flood Hydrograph Model (ReFH)

Zdist Goodness of fit measure for pooling groups

Seasonal correction factor (SCF)

Annual maximum extraction

Import catchment descriptors from .xml files

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

Plot of the annual maximum sample

DDF13 results from .xml files

FEH99 depth duration frequency precipitation model

DDF13 results from a DDF13Import object

Areal reduction factor (ARF)

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

Baseflow index (BFI)