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中文摘要：
从河流能量损失的角度人手，采用理论研究和资料分析相结合的手段，研究了黄河下游河道（花园口-利津）河流能量损失与河道冲淤的相关关系，研究结果表明：河流一般能量损失（如机械能损失、动能损失、势能损失）和动量损失与黄河下游河道年冲淤量之间不存在相关关系；而河流有用功损失、推移功损失与河道年冲淤量之间相关性不明显，但河流悬浮功损失与黄河下游河道年冲淤量之间存在较为明显的相关关系；维持黄河下游河道（花园口-利津）冲淤平衡的能量损失临界条件是水文年内河流悬浮功损失0．75亿J。当悬浮功损失大于此临界值，下游河道将发生淤积；小于此临界值，下游河道将发生冲刷。
英文摘要：
Based on the concept of flow energy loss, this paper studies the correlation between the flow energy loss and the river deposition amount of the Lower Yellow River （ Huayuankou - Lijin）. The results show that the flow energy loss （such as mechanical energy loss, kinetic energy loss, potential energy loss） and momen tum loss has no relevance to the deposition amount of the Lower Yellow River; furthermore, the usable power loss and the traction power loss have no evident relevance to it either. But there is obvious correlation between the suspended power loss and the deposition amount of the Lower Yellow River; the critical yearly sedimenta- tion equilibrium flow energy loss of the Lower Yellow River is 75 x 106 Joule. When the suspended power loss is greater than the critical value, deposition will happen in the river, otherwise, erosion will happen.
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