Finding the hole in a Thailand bucket

Posted 3 September 2020

Results published from a research project between the Land Development Department (LDD) Thailand and UNSW has demonstrated how 2-dimensional mapping can be used to understand soil salinity adjacent to a earthen canal in north east Thailand (Khongnawang et al. 2020).

The results demonstrate how a state of the art electromagnetic (EM) induction instrument (DUALEM-421) can be used with cutting-edge inversion modelling software (EM4Soil) to create 2-d images which can be calibrated to predict soil salinity.

Future research is required to develop methods to map soil salinity along large part of the Khom-rean Canal, which is leaking and causing the water which escapes to mobilise underlying salts in geological units beneath.

The approach has implications for soil and water management and will potentially allow the LDD to identify areas of leakage across the whole Canal network which is over 400 km long.

 The research tool can therefore assist LDD to recommend practices to mitigate the soil salinity and until such time as the leaks in the Canal identified to be sealed using engineering solutions such as retrofitting of impermeable geo-membranes.

Further information about this research can be requested from Associate Professor John Triantafilis

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