Research Article Open Access

Effect of Covers and Rainfall on Soil and Water Conservation Using a Tilting Flume Model

S. Compliew, L. Suwanchai and N. Krongwieng

Abstract

The effect of stone and vegetative covers was evaluated for soil and water conservation in a waterway on salty soils in the Northeast of Thailand. Experiments were conducted on a hydraulic tilting flume under simulated unit flow (120 and 45 cm2s-1), rainfall (120 mm/hr) and slope (0, 1.2,1.4,1.6,1.8,2.0, 2.2, 2.4, 2.6, 2.8 and 3.0%) conditions. The depth of soil was maintained at 0.20 m. over a perforated bed to facilitate deep drainage. A comparative study of bare soil, stone cover (50%) and vegetative cover (50%) is made to evaluate soil loss, deep drainage, Manning's roughness coefficient. The study has revealed that stone cover is more effective than vegetative cover at lower discharge in reducing the flow velocity and thereby soil erosion. Deep drainage has been reduced from lower discharge to higher discharge for all the slopes with cover measures, including bare soil. It is also found that cover measures are necessary beyond 2.6% bed slope in order to prevent rill erosion in salty soils.

American Journal of Applied Sciences
Volume 4 No. 6, 2007, 410-416

DOI: https://doi.org/10.3844/ajassp.2007.410.416

Submitted On: 4 January 2007 Published On: 30 June 2007

How to Cite: Compliew, S., Suwanchai, L. & Krongwieng, N. (2007). Effect of Covers and Rainfall on Soil and Water Conservation Using a Tilting Flume Model . American Journal of Applied Sciences, 4(6), 410-416. https://doi.org/10.3844/ajassp.2007.410.416

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Keywords

  • Inflow
  • runoff
  • deep drainage
  • soil erosion
  • soil and water conservation
  • covers
  • elephant grass or vetiver grass