Hello Sinnappoo (Ravi) Ravindran 

please check the resources

Good evening Nirmala

Thanks very much for your prompt response.

I will read them and let you know.

Much appreciated.

Best regards

Ravi

Ravi,

You have not mentioned how you are measuring suction and MC. In any case, all experimental methods for measuring these variables can possess high levels of uncertainty. Therefore, you should test multiple samples of the same soil before arriving at the final relationship. Also, the relationship between suction and MC is highly dependent on the structure and texture of the soil. So, you can expect the curves to be similar in shape for the same type of soils and dissimilar for others. 

Good Luck!

Good evening Lakshman and Dr Naveen

Thanks very much for the reply. I agree that soil structures and textures play key role. I am using filter paper method and kept the sample for 7 days in a tight container within a cooler box. I agree that I should repeat the tests on multiple samples, I will also read the recommended paper on soil suction using moist filter paper.

Once again thanks very much

Best regards

Ravi

Dear: Mr. Sinnappoo (Ravi) Ravindran

In the matric suction measurement, generally, we try to develop the Soil Water Characteristic Curve (SWCC) which is the relation between matric suction and saturation or volumetric water content.

To get the smooth curve, we can use SOIL VISION Database to fitting the experimental result. This software has a lot of data and method to fit the experimental data.

Thank you

Heri

Hi Heri

Thanks for the valuable advice. I will try to use SOIL VISION software.

best regards

Ravi

Hi Ogbonnaya

Thanks for the response. I totally agree with you. A lot of research papers proved it.

Best regards

Ravi