The underground tunnel system, the advantages of flood protection [4] 1. do not have to return to give back land. 2. drainage of underground tunnel system with higher performance way flat on the ground because of the way flat is suitable for areas with good urban planning. Now Bangkok has changed environment. 3. do not cause problems or conflicts, mass intrusion into issues.4. underground tunnel system can be simplified by using a stream of water from the flooded areas that flow through underground tunnel, new. Electricity is used in everyday life.
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