Author
LEI, TINGWU - P. R. CHINA | |
Nearing, Mark |
Submitted to: International Soil Conservation Organization (ISCO)
Publication Type: Abstract Only Publication Acceptance Date: 5/23/1999 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: A series of flume experiments were conducted to understand shallow water hydraulics, erosion in rills as well as morphological patterns of a rill as affected by rill bed slopes and inflow rates. The soil used was Cecil soil, a sandy loamy soil. Four flow rates, 1, 2, 3 and 4 gallons per minute and 4 slopes, 1%, 3%, 5% and 7% were adopted in the experiments. The velocities, rill widths and sediment concentrations at the outlet were recorded and analyzed with multivariable regression method as functions of slopes, inflow rate and/or their interactive terms. Rill widths changing along the rill with certain periodical patterns were visually observed. A mathematical model is advanced to describe these changing patterns of rill width. |