Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Soil Moisture Changes Beneath a Canal--Lower Cost Canal Lining Program
Unlined cut and embankment sections of a newly constructed canal located in loessial soil were instrumented with piezometers, and nuclear moisture probe casings were installed to determine the flow pattern, pore pressures, and degree of saturation developed below the canal prism. Tests were also conducted to correlate seepage loss as determined by well permeameter and ponding test methods. Test results were: (1) After 2 years of canal operation the degree of saturation in both sections was between 90 and 100%, with very few values of 100% recorded. (2) Points of negative pore pressure existed a short distance horizontally from the wetted canal prism. (3) The seepage patterns which developed appeared to be similar to theoretical patterns--vertical flow with very little lateral movement. (4) Comparisons were made between seepage computed from well permeameter tests and actual seepage from a ponding test. (Author)
Soil Moisture Changes Beneath a Canal--Lower Cost Canal Lining Program
Unlined cut and embankment sections of a newly constructed canal located in loessial soil were instrumented with piezometers, and nuclear moisture probe casings were installed to determine the flow pattern, pore pressures, and degree of saturation developed below the canal prism. Tests were also conducted to correlate seepage loss as determined by well permeameter and ponding test methods. Test results were: (1) After 2 years of canal operation the degree of saturation in both sections was between 90 and 100%, with very few values of 100% recorded. (2) Points of negative pore pressure existed a short distance horizontally from the wetted canal prism. (3) The seepage patterns which developed appeared to be similar to theoretical patterns--vertical flow with very little lateral movement. (4) Comparisons were made between seepage computed from well permeameter tests and actual seepage from a ponding test. (Author)
Soil Moisture Changes Beneath a Canal--Lower Cost Canal Lining Program
D. A. Tiedemann (Autor:in) / C. T. Coffey (Autor:in)
1966
72 pages
Report
Keine Angabe
Englisch
USBR'S lower-cost canal lining program
| Engineering Index Backfile | 1958
Lower-Cost Canal Lining Practice
| ASCE | 2021
| UB Braunschweig | 1977