TideMiner is a scientific utility program which takes a set of tidal data and based on that calculates the flooding duration of elevations
A compiled jar (i.e. a download-and-use version) is available in the 'store' folder - download, run, and have fun. NOTE: to download it, go to the page for the jar (https://github.com/cwarren/tideminer/blob/master/store/TideMiner2014.jar), then right-click the link that says 'View Raw' and do 'Save Link As...' or whatever the equivalent is in your browser. Alternatively, just download the whole repository ('Clone in Desktop' or 'Download ZIP' buttons in the lower right) and it will be included.