Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: ASSESSING CONSERVATION EFFECTS ON WATER QUANTITY AND QUALITY AT FIELD AND WATERSHED SCALES

Location: National Soil Erosion Research Lab

Title: A multiple-segment recirculating flume to quantify chemical transport processes in drainage ditches

Authors
item Nouwakpo, Sayjro -
item Huang, Chi Hua

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: May 1, 2012
Publication Date: October 21, 2012
Citation: Nouwakpo, S.K., Huang, C. 2012. A multiple-segment recirculating flume to quantify chemical transport processes in drainage ditches [abstract]. American Society of Agronomy Annual Meeting Abstracts, October 21-24, 2012, Cincinnati, Ohio. 2012. CD ROM.

Technical Abstract: Recirculating flumes have been used to quantify chemical transport between the soil (or sediment) and the flowing water. Some researchers used recirculating flumes to simulate chemical transport processes occurring in flowing streams or drainage ditches. When we examined the theoretical basis of the recirculating flume experiments, we found that the sediments in a fixed length flume behave like a point source or sink for chemicals and it is a challenge to extend results from a point to a stream reach. To provide a more realistic simulation of chemical transport processes, we designed a multiple-segment recirculating flume that consist of four 5-meter long individual flumes that are connected and can be sampled in between any of the segments, i.e., a 20-m long segmented flume. We also installed water supply or drainage lines to control the hydraulic gradient at channel bottom to simulate sub-surface hydrologic processes occurring at the hyporheic zone. In this presentation, we will present the analytic basis of the multiple-segment flume and show results from initial runs made in this flume.

Last Modified: 10/22/2014
Footer Content Back to Top of Page