To develop formula for discharge through sluice gates in reservoirs
This report presents the results of investigation on the coefficient of discharge and channel delivery characteristics for the sluice gate structures at 5 reservoirs in Singapore; i.e., Jurong Lake, Kranji, Lower Seletar, Pandan and Poyan. Based on the available prototype drawings provided by PUB,...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Research Report |
| Language: | English |
| Published: |
2011
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/42840 |
| _version_ | 1826119869008969728 |
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| author | Lim, Siow Yong. Cheng, Nian Sheng. Toh, Hong Seong. |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Lim, Siow Yong. Cheng, Nian Sheng. Toh, Hong Seong. |
| author_sort | Lim, Siow Yong. |
| collection | NTU |
| description | This report presents the results of investigation on the coefficient of discharge and channel delivery characteristics for the sluice gate structures at 5 reservoirs in Singapore;
i.e., Jurong Lake, Kranji, Lower Seletar, Pandan and Poyan. Based on the available prototype drawings provided by PUB, the dimensions of the gates were extracted and model gates were constructed. The 5 sluice gates can be grouped in the following types and shapes; 1) Type A: Plain rectangular sluice gate - Jurong Lake. 2) Type B: Beveled rectangular sluice gate - Sungei Pandan and Sungei Seletar Reservoirs.
3) Type C: Combined sluice-flap gate - Kranji and Poyan Reservoirs. All the gates have sharp-edged at the point where water exits from the gate. Based on the extensive experimental data collected from the model study, the coefficients of discharge, Cd for estimating the discharge under free and submerged underflow conditions for the 5 sluice gates have been established. The weir coefficient, Cw for overflow through the sluice-flap gate of the Kranji reservoir has been obtained. These coefficients should be used with the discharge formulas (Equations 3.4 and 3.5) to calculate the volume of water discharge through the gates. A 1:50 scale model of the Kranji reservoir was fabricated to study the channel delivery
characteristics when the gates are completely opened. A general formula (Equation 4.12) has been proposed to calculate the discharge through the gated waterways and it is applicable to various degree of channel constriction, i.e., whether one-, two- or threegates operation conditions. |
| first_indexed | 2024-10-01T05:07:10Z |
| format | Research Report |
| id | ntu-10356/42840 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:07:10Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | ntu-10356/428402023-03-03T16:45:18Z To develop formula for discharge through sluice gates in reservoirs Lim, Siow Yong. Cheng, Nian Sheng. Toh, Hong Seong. School of Civil and Environmental Engineering DRNTU::Engineering::Environmental engineering This report presents the results of investigation on the coefficient of discharge and channel delivery characteristics for the sluice gate structures at 5 reservoirs in Singapore; i.e., Jurong Lake, Kranji, Lower Seletar, Pandan and Poyan. Based on the available prototype drawings provided by PUB, the dimensions of the gates were extracted and model gates were constructed. The 5 sluice gates can be grouped in the following types and shapes; 1) Type A: Plain rectangular sluice gate - Jurong Lake. 2) Type B: Beveled rectangular sluice gate - Sungei Pandan and Sungei Seletar Reservoirs. 3) Type C: Combined sluice-flap gate - Kranji and Poyan Reservoirs. All the gates have sharp-edged at the point where water exits from the gate. Based on the extensive experimental data collected from the model study, the coefficients of discharge, Cd for estimating the discharge under free and submerged underflow conditions for the 5 sluice gates have been established. The weir coefficient, Cw for overflow through the sluice-flap gate of the Kranji reservoir has been obtained. These coefficients should be used with the discharge formulas (Equations 3.4 and 3.5) to calculate the volume of water discharge through the gates. A 1:50 scale model of the Kranji reservoir was fabricated to study the channel delivery characteristics when the gates are completely opened. A general formula (Equation 4.12) has been proposed to calculate the discharge through the gated waterways and it is applicable to various degree of channel constriction, i.e., whether one-, two- or threegates operation conditions. RGM 23/02 2011-01-20T00:51:03Z 2011-01-20T00:51:03Z 2005 2005 Research Report http://hdl.handle.net/10356/42840 en 53 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Environmental engineering Lim, Siow Yong. Cheng, Nian Sheng. Toh, Hong Seong. To develop formula for discharge through sluice gates in reservoirs |
| title | To develop formula for discharge through sluice gates in reservoirs |
| title_full | To develop formula for discharge through sluice gates in reservoirs |
| title_fullStr | To develop formula for discharge through sluice gates in reservoirs |
| title_full_unstemmed | To develop formula for discharge through sluice gates in reservoirs |
| title_short | To develop formula for discharge through sluice gates in reservoirs |
| title_sort | to develop formula for discharge through sluice gates in reservoirs |
| topic | DRNTU::Engineering::Environmental engineering |
| url | http://hdl.handle.net/10356/42840 |
| work_keys_str_mv | AT limsiowyong todevelopformulafordischargethroughsluicegatesinreservoirs AT chengniansheng todevelopformulafordischargethroughsluicegatesinreservoirs AT tohhongseong todevelopformulafordischargethroughsluicegatesinreservoirs |