**4.2 Data statistical analysis and threshold**

The distribution analysis showed that the discharge data from AWLR and Umbul Dams follow the gamma distribution and the same was also reported for the rainfall data from Kali Asem Catchment Area and Umbul sub-watersheds as well as the discharge data from Sutami Dam.

The next analysis conducted based on the gamma distribution showed the following results for the Kali Asem and Umbul sub-watersheds:


The same method was used to obtain the threshold values for Sutami Dam as follows:

