但同时也存在对进水悬浮物要求较高，磷去除率低，水头损失大，污水提升高度大等问题。
Its shortcomings include harsh restriction for suspended solid in influent, low phosphorus removal efficiency, high water-head loss and the height of lifting sewage.
随着井深增加，水温对水头高度的影响越来越大，需要采用下井仪器测量井底压力。
The influence of water temperature on water head height becomes bigger as the well depth increases. The pressure at the well bottom has to be measured by instruments in the well.
指出速度水头对同一液面高度的实际流量的影响及不同液面高度下的自流发油流量。
Described are the influence of velocity head on the actual flows with same level and the artesian flows for different liquid levels.
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