Geomorphology Survey

Implementation Partners:

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MRCS
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CAMBODIA
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LAOPDR
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THAILAND
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VIETNAM
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WWF


The Navigation Programme at the MRC has requested assistance from the IKMP to carry out baseline channel morphology surveys at a proposed rock removal site near Kong Phi Luang rapids in northern Thailand and Lao PDR. The planned rock removal is for the purpose of improving navigation safety. There are concerns that the removal of several bedrock obstructions from the channel may result in river incision or deposition in surrounding areas. This could potentially lead to exposure of other bedrock obstructions or detrimental effects on aquatic biota.
The aims of baseline channel morphology surveys are:

  • To collect river channel cross-section profiles that can be compared to repeat surveys in the future to monitor and mitigate against potential morphological change;
  • To provide input data to hydraulic and sediment transport models that can be used to predict channel incision and deposition. This would enable mitigation measures to be implemented prior to the removal of rocks.