Hosenfeld, FriedhelmHach, RalfKnetsch, GerlindeZacharias, Ute2019-09-202019-09-202012https://dl.gi.de/handle/20.500.12116/27732The high-water and storm surge information system Schleswig-Holstein (HSI) is a portal site offering details about current water levels on digital maps as well as flood warnings and various background information about these topics including weather data, web cam positions, addresses and web links. The main challenge of the system design was to comply with different requirements: while during normal periods only an average number of users will visit the site, in extreme high-water situations the number of accesses will explode. Especially in these cases it is the system’s essential task, to present highly up-to-date and reliable information. Thus, a solution was developed combining up-to-date data presentation with static HTML-pages reducing server load in extreme situations as far as possible in order to manage access for many concurrent users.Text/Conference Paper