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Canal-Lining Demonstration Project 2000 Supplemental Report
| 题名： | Canal-Lining Demonstration Project 2000 Supplemental Report |
| 作者： | Jay Swihart and Jack Haynes |
| 关键词： | Geosynthetic water conservation geotextile Geocomposite geomembrane ponding tests/Benefit-Cost Analysis/life-cycle costs |
| 摘要： | The Deschutes Canal-Lining Demonstration Project is a cooperative effort among the Bureau of Reclamation, several irrigation districts, and several geosynthetic lining manufacturers. The purpose of the study is to develop low-cost canal-lining technologies to reduce seepage over severe rocky subgrade conditions. Over the first 7 years. Reclamation constructed 27 altemative canal-lining test sections using combinations of geosynthetics, shotcrete, roller compacted concrete (RCC), grout mattresses, soil, elastomeric coatings, and sprayed-in-place foam. This report documents the construction of two additional test sections using an exposed 45-mil EPDM rubber geomembrane and an exposed 30-mil Linear Low Density Polyethylene (LLDPE) geomembrane. Unit construction costs range from $0.78 to $0.87 per square foot The test sections will be monitored for maintenance requirements, durability, and effectiveness to calculate Benefit-Cost ratios. This report also documents seepage studies performed on a RCC-Shotcrete test section. The seepage studies include both fullscale short-term ponding tests and long-term inflow-outflow measurements taken over a 3-year period. The two methods yield similar results, and show that the RCC-Shotcrete lining is 75 to 85 percent effective which agrees well with previous estimates. |
| 报告类型： | 科技报告 |
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