The need to build a road near the community most. And has built roads and main roads, secondary roads and streets within the community increased greatly. For convenience for travel and save energy. The building houses a water barrier. Hence, the amount of water used in the wet season which occurs regularly every year can not flow to the area and ever. Thus, the total amount of water stored in the lowlands. And the rain continued long goodbye is concave. And flooding mentioned characteristics. Therefore, the correct basic principle should be to control the allocation of water to different areas in the timely manner in which we have prepared and planned.
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