Mathematical Model of Air Pocket Evolution during Water Filling a Long-Slope Pipeline and Its Application to Air Removal Prediction

Table 2

Topographic parameters for the three types of terrains.

No.	Downward sloping reach			Upward sloping reach
	Length (km)	Elevation difference (m)	Inclination (°)	Length (km)	Elevation difference (m)	Inclination (°)
Terrain 1	10.56	1287	7.00	11.93	692	3.33
Terrain 2	5.27	124	1.35	10.02	290	1.66
Terrain 3	1.15	56.49	2.82	28.89	250.83	0.50