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- Title
Determining Optimal Horizontal Spacing for Sand Filter in Reservoir Dams.
- Authors
Hong, Hyuk-Kee; Tobita, Tetsuo; Lee, Young-Hak; Park, Jaesung
- Abstract
Reservoir dam erosion caused by an increased seepage velocity on downstream slopes is a major concern, and zoned-type dams are commonly used to mitigate this issue. However, previous methods for calculating filter spacing have been overly conservative, focusing on short-term stability and neglecting long-term erosion risk. This study proposes a determining equation for the horizontal filter spacing in reservoir dams, considering material property variability and diverse dam construction conditions. Through comprehensive three-dimensional seepage simulations, the lateral drainage range (LDR) and hydraulic gradient were investigated as separate factors. The proposed equation aims to optimize the filter design while balancing the safety and cost considerations. Validation using a multi-horizontal filter model confirmed the effectiveness of the proposed spacing in mitigating erosion hazards. This study contributes to the improvement in dam design practices by providing a less conservative approach. These findings offer valuable insights for designing horizontal filters in reservoir dams, ensuring both short- and long-term erosion stability. Ultimately, these advancements in filter design will enhance dam stability and reduce the risk of failure.
- Subjects
SAND filtration (Water purification); DAMS; SEEPAGE; RESERVOIRS; DAM design &; construction; DESIGN services; DRAINAGE
- Publication
Paddy & Water Environment, 2024, Vol 22, Issue 1, p99
- ISSN
1611-2490
- Publication type
Article
- DOI
10.1007/s10333-023-00955-5