Role of SWCC in Practice

Blight Lecture, – ISMCGE 2017 
Delwyn G. Fredlund, Senior Geotechnical Engineering Specialist, Golder Associates


In Seoul 2017, Prof Fredlund one of top Unsaturated Researcher had delivered a talk in Soil Water Retention Curve in practice. The talk was delivered in Blight Lecture  in ISSMGE conference. Basically, Soil Water retention curve is the relationship between the water content, θ, and the soil water potential, ψ. This curve is characteristic for different types of soil, and is also called the soil moisture characteristic.

It is used to predict the soil water storage, water supply to the plants (field capacity) and soil aggregate stability. Due to the hysteretic effect of water filling and draining the pores, different wetting and drying curves may be distinguished.

The general features of a water retention curve can be seen in the figure, in which the volume water content, θ, is plotted against the matric potential, {\displaystyle \Psi _{m}}\Psi_m. At potentials close to zero, a soil is close to saturation, and water is held in the soil primarily by capillary forces. As θ decreases, binding of the water becomes stronger, and at small potentials (more negative, approaching wilting point) water is strongly bound in the smallest of pores, at contact points between grains and as films bound by adsorptive forces around particles.

Sandy soils will involve mainly capillary binding, and will therefore release most of the water at higher potentials, while clayey soils, with adhesive and osmotic binding, will release water at lower (more negative) potentials. At any given potential, peaty soils will usually display much higher moisture contents than clayey soils, which would be expected to hold more water than sandy soils. The water holding capacity of any soil is due to the porosity and the nature of the bonding in the soil.


 Please watch and read the full information below especially for Geotechnical Engineering Post Graduate Students.

Click Here_>>>>>Full paper Hons. Blight Lecture

Click Here >>>>>> Full video

Mental Health a major concern in coming years among Malaysian Students?

Definition of Depression Depression (major depressive disorder) is a common and serious medical illness that negatively affects how you feel, the way you think and how you act. Fortunately, it is also treatable. Depression causes feelings of … [Continue reading]

Gold at IPHEX 2017

KUALA LUMPUR, 16 November 2017 – UTM researchers won Best of the Best and Special Award in Engineering Education awards at the 4th International Innovative Practices in Higher Education Expo (I-PHEX) 2017, which was held at Berjaya Times Square … [Continue reading]

Telaga Air Bumi Kahang, Kluang

TELAGA TIUB ATASI MASALAH AIR Jul 25, 2017 KLUANG ; 25 JULAI 2017 – Masalah kekurangan bekalan air bersih yang membelenggu penduduk Orang Asli di Kampung Air Pasir, Kahang, dekat sini, sejak lebih 50 tahun yang lalu bakal diatasi dengan … [Continue reading]

Climate Change induced beach erosion

  Beach profile changes are subjected to various parameters such as tides, currents and wave effect. This study investigates the beach profile changes at Teluk Gorek Beach, Mersing and to evaluate the effect of soil density on beach sediment. … [Continue reading]

Gunung Pulai in the eyes of the world

Campbell Scientific had published our work in Gunung Pulai in December 2016 newsletter. We have been using their equipment supplied by SureChem  (Malaysia). Rain gauge and water level transmitter have been used as part of our integrated  Early … [Continue reading]

The power of habit

Change might not be fast and it isn’t always easy. But with time and effort, almost any habit can be reshaped.   THE FRAMEWORK: Identify the routine Experiment with rewards Isolate the cue Have a plan Do you would like to … [Continue reading]

Protected: Quiz Advance Foundation Engineering Dec 2016

This content is password protected. To view it please enter your password below: Password: … [Continue reading]

Lecture notes: MKAJ1033/SKAA4713 Advance Foundation- Problematic Soils

Problematic soils are those that make the construction of foundations extremely difficult. They include expansive soils, collapsing soils, and sanitary landfill. Their distribution can vary widely, both areas and with depth. However, the ability to … [Continue reading]

Gunung Pulai Official Re-Opening

KULAI: The Gunung Pulai Forest Reserve, which was closed down some 15 years ago following a tragedy that saw the loss of five lives, has finally reopened to the public with an early warning system installed for the safety of visitors. Johor … [Continue reading]