Fig. 1. Overview of the study area

Fig. 2. Comparison of R95D and R99D with flood disaster frequency

Fig. 3. The annual precipitation on the Qinghai-Tibet Plateau and the change in the proportion of precipitation in each season

Fig. 4. Annual precipitation and precipitation tendency rate at each station on the Qinghai-Tibet Plateau

Fig. 5. The extreme precipitation thresholds of each station on the Qinghai-Tibet Plateau

Fig. 6. Interannual variation of the four extreme precipitation indexes

Fig. 7. The spatial distribution of the four extreme precipitation indexes