Table 1 Test scheme for sand-gravel replacement.
Canal orientation | Test section | Replacement location of canal | Replacement thickness (cm) |
|---|---|---|---|
East–west direction | Ⅰ | Shady slope | 40 cm (top) to 100 cm (bottom) |
Sunny slope | 30 cm (top) to 70 cm (bottom) | ||
Bottom | 70 cm | ||
Ⅱ | Shady slope | 20 cm (top) to 50 cm (bottom) | |
Sunny slope | 15 cm (top) to 35 cm (bottom) | ||
Bottom | 35 cm | ||
North–south direction | Ⅲ | Slop | 30 cm (top) to 70 cm (bottom) |
Bottom | 70 cm | ||
Ⅳ | Slope | 15 cm (top) to 35 cm (bottom) | |
Bottom | 35 cm |
