[請益] 絕對高程GL問題請教
請教大家ㄧ下
絕對高程指得是海拔平面高程
那ㄧ般來說GL+5.5應該是高於GL+5
以水流向高程應該是GL+5.5高處水往GL+5低處流，那為什麼污水有些水流向卻不是高處往低處流的箭頭方向呢？反而有些是低處往高處流呢？
請大家指教ㄧ下
謝謝
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