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For effective drainage therefore, the entire site should be located above flood level at a minimum of 3 m above the water table, preferably on a gently sloping area.
因此需要注意,为了保证有效的排水,整个地点应当高过洪水水位、高于地下水位至少3米,最好是在地势略微倾斜的地区。
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