Click on “Download PDF” for the PDF version or on the title for the HTML version.


If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

EXPERIMENTAL EVALUATION OF SEDIMENTATION BASIN PERFORMANCE FOR ALTERNATIVE DEWATERING SYSTEMS

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Transactions of the ASAE. VOL. 40(4):1087-1095. (doi: 10.13031/2013.21361) @1997
Authors:   J. A. Millen, A. R. Jarrett, J. W. Faircloth
Keywords:   Erosion, Sediment basins, Field study, Skimmer, Barriers

The effectiveness of four sediment removal/water control treatments, each designed to dewater the 155-m3 sedimentation basin in 24 h, was evaluated using 100-m3 inflow hydrographs (35-mm, 2-yr runoff events) from a 0.4-ha denuded construction site containing 454 kg of sediment. The treatments were a perforated riser alone that discharged 26.1 kg of sediment and had an overall sediment retention efficiency of 94.3%; two internal barriers designed to trisect the basins volume with a perforated riser, significantly reduced the sediment loss below that of the perforated riser alone to 20.4 kg; a skimmer alone discharged the least total sediment at only 14.3 kg; and trisecting the basin with barriers, with the skimmer, did not improve the capture efficiency of the basin over that of the skimmer alone. All treatments removed 100% of soil particles and aggregates larger than 75 m. The basin sediment was completely mixed during the entire inflow/dewatering event and the effluent particle size distribution was the same as that observed for the influent sediment smaller than 75 m. Particle sizes retained between 0.1 and 75 m ranged from 77 to 100% with the poorest retention in the 6 to 12 m range.

(Download PDF)    (Export to EndNotes)