Giant tunnel drainage flooding in the area helped Bangkok effectively. A large drainage tunnels will help enhance the drainage problem areas flooded due to a low depression and drainage system in the area, including great sewer canals, there are no limits can bring flooding out of the area into the Chao Phraya River, why it is necessary to the construction of a large underground drainage tunnel to accelerate drainage from the flooding areas to direct the Chao Phraya River, the canal system as usual. As well as variety drainage from accelerates the outer-space, ventilation, drainage canal passes into space defense and then flow into underground drainage tunnel and then cooled down to the Chao Phraya River. To alleviate the flooding problems of protection outside Bangkok as well, and also help to reduce the water level in the Canal to drain line low for fast performance in drainage canal. In addition, the drainage tunnels can also help to bring the bile came from the Chao Phraya River in the Canal area in dilute wastewater in class community without affecting the drainage canal in, flood problems in the area.
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