AMextract

a data.frame with dates (or POSIXct) in the first column and variable in the second

a logical argument with a default of TRUE. If TRUE the extracted annual maximum is plotted

Plot

Extracts the annual maximum peaks from a data.frame which has dates in the first column and variable in the second.

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 10. 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, <doi:10.2166/nh.2019.157>). "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, <doi:10.2166/nh.2021.059>). "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, <http://software.hydrosolutions.co.uk/winfap4/Urban-Adjustment-Procedure-Technical-Note.pdf>). Data from the UK National River Flow Archive (<https://nrfa.ceh.ac.uk/>, terms and conditions: <https://nrfa.ceh.ac.uk/costs-terms-and-conditions>).

Anthony Hammond

UKFE

UK Flood Estimation

AMextract function

<dl><dt>x</dt>
<dd>a data.frame with dates (or POSIXct) in the first column and variable in the second</dd>
<dt>Plot</dt>
<dd>a logical argument with a default of TRUE. If TRUE the extracted annual maximum is plotted</dd></dl>

Arguments

Author

Annual maximum extraction — AMextract

<dl>

<dt>x</dt>
<dd>a data.frame with dates (or POSIXct) in the first column and variable in the second</dd>


<dt>Plot</dt>
<dd>a logical argument with a default of TRUE. If TRUE the extracted annual maximum is plotted</dd>

</dl>

AMextract: Annual maximum extraction

Description

Usage

Value

Arguments

Author

Details

Examples