Investigation of the change in extreme precipitation in the Netherlands

This thesis deals with the change in extreme rainfall in the Netherlands. The stimulus came from the presentation of a KNMI scenario about increased rainfall in the Netherlands and the likelihood of an extreme event. Precipitation can be one of the weather phenomena with a strong influence on the life of this planet and on our daily lives. This results in the research community trying to investigate whether this phenomenon is attributed to anthropogenic interventions and identifying its extreme trends. Initially, based on literature, theories and methods used in data processing to identify extreme values are analyzed, starting with a historical overview In addition, the software used to process the data is presented. Hydrological data were collected from the KNMI (Royal Netherlands Meteorological Institute) database, which is the Netherlands National processed statistically via Matlab, Excel and Hydrognomon. Hourly and daily precipitation data were obtained. With the help of the above software, it was possible to create charts based on the amount of rain and the recovery period. These diagrams were made for each station and for all the data. Creating them is important in order to compare them with the diagram from the KNMI script and to explore how to create this diagram. In addition, GEVmax charts were generated for each station for both hourly and daily rainfall and their parameters were collected. In addition to the daily rainfall totals, POT charts were created as well as used in the application of the Mann Kendal test. Finally, conclusions are drawn from the application of the above methods to determine the presence or absence of rainfall in the Netherlands and their trend.