Study on the Rectification of Forebay in Pumping Station

Table 2

List of test schemes for flow pattern of pumping station.

Program number	Plan description	Action description (prototype in parentheses)
1	Original plan	Without any action (Figure 2).
2	“Y” type diversion pier	The “Y” type diversion pier top elevation is equal to the lowest water level. Side length: 10 cm (2.5 m) (Figure 4).
3	“T” shaped diversion pier	The “T” type diversion pier top elevation is equal to the lowest water level. Side length: 10 cm (2.5 m). The edges of the diversion piers have changed (Figure 5).
4	4 cm narrow bottom	Bottom hole height: 4 cm ( = 1 m) (Figure 6).
5	High and wide bottom	High and wide bottom width of 6 cm (1.5 m); top width: 3 cm (0.75 m); bucket top elevation: 6 cm (1.5 m) (Figure 7).
6	Diversion wall	The diversion wall elevation is equal to the minimum water level. Length: 30 cm (7.5 m) (Figure 8).