| Author | Sahoo, Narayan |
| Call Number | AIT Thesis no. WA-88-13 |
| Subject(s) | Soil erosion
|
| Note | A thesis submitted in partial fulfilment of the requirement for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The entrainment ratio, which is a ยท soil erodibility parameter
for estimation of cohesive sediment transport, was studied
experimentally using two different cohesive soils namely reddish
colour silty sand soil and greyish colour silty sand soil. These
two types of cohesive soils had been collected from National
Park, Khaoyai, Thailand. Each soil type was used in a laboratory
flume and experiments were carried out with controlled flow and
mild slope conditions. The observed parameters were discharge,
flow depth, flow velocity and sediment transport. Actually
twenty-two sets of experiments were carried out for each type of
soil with different combinations of slope and discharge.
Analysis of the obtained data showed that both slope and
discharge conditions affected the entrainment ratio. It was also
noticed that with increase in discharge rates, the entrainment
ratio for reddish colour silty sand soil decreased for a given
slope condition of the channel bed. But no such trend was found
in case of the greyish colour silty sand soil. Moreover, the
entrainment ratio decreased with increase in slope for any
constant discharge in case of both types of soil used in the
experiment. It was also evident from regression analysis that the
cohesive sediment transport could be related linearly with the
sediment transport capacity with high coefficient of
determination for both the soil types. In addition a stepwise
multiple regression analysis revealed that for both soils there
was a exponential relationship between the cohesive sediment
transport and the flow velocity. The flow depth and slope had
only an indirect effect on the cohesive sediment transport
through their effect on the flow velocity. |
| Year | 1988 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Nielsen, Steen Asger
|
| Examination Committee(s) | Preecha Kamronrithisorn ;Murty, V.V.N ;Paudyal, Guna N.
|
| Scholarship Donor(s) | The Government of Switzerland |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1988 |