BACKWATER CURVE

backwater distance 回水距离

B: (Kimia) kurva air-balik
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منحني يا نمودار پنگاب ، نمودار برگشت آب
نموداري است که افزايش ارتفاع گيري سطح آب مخزن از سد ، بند ، خاکريز و ديگر موارد را تا انتهاي درياچه مخزن که توسط جريان آب ورودي ايجاد مي شود، ارائه مي دهد .

The longitudinal profile of the water surface in an open channel where the water surface is raised above its normal level by a natural or artificial obstruction. The term is sometimes used in a generic sense to denote all water surface profiles, or profiles where the water is flowing at depths greater than critical.

The term applied to the profile of the water surface above a dam or other obstruction in a channel. This may also be stated as the effect on the natural water surface profile of either of two confluent streams upstream from their confluence due to flow conditions in the other stream. (TNDOT1)