templates for ppt

1. Infiltration Measurement
Presented by: Ariel Klare Amplao

2. Infiltration Measurement
Information about the
infiltration characteristics of the
soil at a given location can be
obtain by conducting controlled
experiments on small areas.
The experimental setup
is called infiltrometer test and is
shown in the figure.

3. Infiltrometer
- It is a device used to measure the
rate of water infiltration to soil.
-It consists of two concentric rings.
This two rings are inserted (about
10cm) into the ground and water is
maintained in both rings to a common
fixed level

4. Infiltrometer
- The outer ring provides a water
jacket to the infiltrating water of
the inner ring and hence prevents
the spreading out of the infiltrating
water of the inner ring
- Water is poured into the rings
(both) to a depth of 5 cm and a
pointer is set to mark the water
level

5. Infiltration Measurement
- As infiltration proceeds, the volume is made
up by adding water from a burette to keep
the water level at the tip of the pointer
- Knowing the volume of water added at
different time intervals, the plot of
infiltration capacity versus time is obtained.
(Figure: Plan and sectional view of
layout of a double-ring infiltrometer and
quick draw tensiometers)

6. Infiltration Measurement
- The experiment are continued till a uniform
rate of infiltration is obtained and this may
take 2-3 hours
- The surface of the soil is usually protected by
a perforated disk to prevent formation of
turbidity and its setting on the soil surface

7. Infiltration Measurement
- A graph of cumulative infiltration rate versus
time, prepared from known volume of water
added at different time intervals, during an
infiltration experiment is shown in the figure.
Cumulative infiltration rates from a double ring
infiltration test on flat grass-covered surface
(from Rahardjo et al, 2002).

8. Thank you
Do you have any questions?