Optimal groyne combination for the test channels
| Channel type . | Formulation . | Target speed (θ) (m/s) . | Groyne number (GN) . | Groyne length on left bank in terms of grid occupied (GLL) . | Groyne length on left bank in terms of metre (GLL) . | Groyne length on right bank in terms of grid occupied (GLR) . | Groyne length on right bank in terms of metre (GLR) . | Groyne position on left bank in terms of node number (GPL) . | Groyne position on left bank in terms of metre (GPL) . | Groyne position on right bank in terms of node number (GPR) . | Groyne position on right bank in terms of metre (GPR) . | C . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Straight | I | 0.2 | 2 | – | – | 3, 4 | 30, 40 | – | – | 31, 44 | 300, 430 | 70p |
| 0.1 | 2 | – | – | 4, 4 | 40, 40 | – | – | 31, 47 | 300, 460 | 80p | ||
| II | 0.2 | 3 | – | – | 3, 4, 1 | 30, 40, 10 | – | – | 31, 46, 61 | 300, 450, 600 | 80p | |
| 0.1 | 3 | – | – | 3, 4, 3 | 30, 40, 30 | – | – | 31, 41, 51 | 300, 400, 500 | 1,00p | ||
| III | – | 2 | – | – | 4, 4 | 40, 40 | – | – | 31, 48 | 300, 470 | 80p | |
| – | 3 | – | – | 4, 4, 4 | 40, 40, 40 | – | – | 31, 41, 50 | 300, 400, 490 | 1,20p | ||
| Bend | I | 0.3 | 5 | 2, 2, 2 | 24, 24, 24 | 3, 2 | 36, 24 | 30, 37, 42 | – | 79, 88 | – | 132p |
| 0.2 | 4 | 3, 3 | 36, 36 | 4, 2 | 48, 24 | 32, 40 | – | 80, 89 | – | 144p | ||
| II | 0.3 | 6 | 1, 3, 2 | 12, 36, 24 | 1, 3, 2 | 12, 36, 24 | 25, 33, 41 | – | 73, 81, 89 | – | 144p | |
| 0.2 | 6 | 1, 3, 3 | 12, 36, 36 | 1, 4, 2 | 12, 48, 24 | 25, 33, 41 | – | 73, 81, 89 | – | 168p | ||
| III | – | 4 | 4, 4 | 48, 48 | 4, 4 | 48, 48 | 32, 39 | – | 80, 88 | – | 192p | |
| – | 6 | 4, 4, 4 | 48, 48, 48 | 4, 4, 4 | 48, 48, 48 | 32, 38, 42 | – | 80, 85, 90 | – | 288p |
| Channel type . | Formulation . | Target speed (θ) (m/s) . | Groyne number (GN) . | Groyne length on left bank in terms of grid occupied (GLL) . | Groyne length on left bank in terms of metre (GLL) . | Groyne length on right bank in terms of grid occupied (GLR) . | Groyne length on right bank in terms of metre (GLR) . | Groyne position on left bank in terms of node number (GPL) . | Groyne position on left bank in terms of metre (GPL) . | Groyne position on right bank in terms of node number (GPR) . | Groyne position on right bank in terms of metre (GPR) . | C . |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Straight | I | 0.2 | 2 | – | – | 3, 4 | 30, 40 | – | – | 31, 44 | 300, 430 | 70p |
| 0.1 | 2 | – | – | 4, 4 | 40, 40 | – | – | 31, 47 | 300, 460 | 80p | ||
| II | 0.2 | 3 | – | – | 3, 4, 1 | 30, 40, 10 | – | – | 31, 46, 61 | 300, 450, 600 | 80p | |
| 0.1 | 3 | – | – | 3, 4, 3 | 30, 40, 30 | – | – | 31, 41, 51 | 300, 400, 500 | 1,00p | ||
| III | – | 2 | – | – | 4, 4 | 40, 40 | – | – | 31, 48 | 300, 470 | 80p | |
| – | 3 | – | – | 4, 4, 4 | 40, 40, 40 | – | – | 31, 41, 50 | 300, 400, 490 | 1,20p | ||
| Bend | I | 0.3 | 5 | 2, 2, 2 | 24, 24, 24 | 3, 2 | 36, 24 | 30, 37, 42 | – | 79, 88 | – | 132p |
| 0.2 | 4 | 3, 3 | 36, 36 | 4, 2 | 48, 24 | 32, 40 | – | 80, 89 | – | 144p | ||
| II | 0.3 | 6 | 1, 3, 2 | 12, 36, 24 | 1, 3, 2 | 12, 36, 24 | 25, 33, 41 | – | 73, 81, 89 | – | 144p | |
| 0.2 | 6 | 1, 3, 3 | 12, 36, 36 | 1, 4, 2 | 12, 48, 24 | 25, 33, 41 | – | 73, 81, 89 | – | 168p | ||
| III | – | 4 | 4, 4 | 48, 48 | 4, 4 | 48, 48 | 32, 39 | – | 80, 88 | – | 192p | |
| – | 6 | 4, 4, 4 | 48, 48, 48 | 4, 4, 4 | 48, 48, 48 | 32, 38, 42 | – | 80, 85, 90 | – | 288p |