The erosion calculator was devised in an original form in 2012 by Brian Williams as an aid to ongoing studies of the East Yorkshire coast.
It is now made available online as a download.
Written in Liberty BASIC v4.04, the calculator is currently limited to PC desktop.
Calculator, data, and support files are downloaded as a compressed (zip) package:
erosion-calculator > erosion-calculator.exe > ‘Extract all’
To start the calculator:
erosion-calculator > erosion-calculator.exe
A desktop icon can be created by right-clicking the second .exe file:
Send to > Desktop (create shorcut)
The database is updated once a year. Any future download will overwrite an existing installation
Enter a location number and date range. Location numbers are those of monitoring profiles, 123 in all, from north to south, as maintained by East Riding of Yorkshire Council. A list is provided within the calculator.
Dates are organised into nominal years. For example, the first Ordnance Survey was conducted 1852 to 1854 – a period represented as 1854. Since 1998, monitoring takes place autumn and spring. These twice-yearly readings are merged into single annual values.
Any first and last year from 1854 to 2013 may be entered into the calculator. At a handful of locations, monitoring either started late or is discontinued. No erosion is recorded along major defences. The calculator advises accordingly.
Each year of the requested range for the particular location appears on the screen in rapid succession. A summary follows, normally all that is required. Individual years may be scrolled back to. Prior to 2003, data are generally averaged over intervals between surveys. Survey dates and lengths of periods they cover are displayed.
Data for the erosion calculator is obtained from East Riding of Yorkshire Council. Whilst every care is taken in preparation, no liability is implied. The extent of future cliff losses cannot be assumed from past rates of erosion.