**4. Case Study**

Jinping-I super-high arch dam is the highest concrete arch dam in the world. The dam has a crest elevation of 1885.0 m and a maximum dam height of 305.0 m. Jinping Grade I Hydropower Station started to store water from the lower gate of the right bank diversion hole on 30 November 2012, to 1800 m on 18 July 2013, and to the normal water level of 1880 m on 24 August 2014. After August 2014, the reservoir level is in an annual cycle and can be divided into four main stages in the following order: (1) a rising period from mid-to-late June to mid-July and mid-September each year; (2) a stable period of high-water level at 1880 m, lasting for 97 to 167 d; (3) a falling period from late-December to early-April till early-June each year; (4) a stable period of low water level at 1800 m, lasting for half a month to two months. (4) 1800 m low water level stabilisation period, lasting from half a month to 2 months. Figure 3 depicts the displacement of the PL9-1 plumb-line monitoring point and the water reservoir changing trend from 1 October 2013 to 31 December 2018 for a continuous time period. According to the reservoir water level changes, the reservoir water level change process was divided into four stages. Figure 4 shows the water level segmentation interval during a year, and Figure 5 represents the simulation of the scenario of the Jinping-I super-high arch dam.

**Figure 3.** The radial displacement and the reservoir water level of the NO.9 dam section.

**Figure 4.** The water level segmentation interval diagram.

**Figure 5.** The simulation of the scenario and the of Jinping-I super-high arch dam.
