BYRE
发表于 2025-3-25 06:15:09
Basic Concepts,open or closed at the top. The structures with closed tops are referred to as . and those with the top open are called .. For example, tunnels and pipes are closed conduits whereas rivers, streams, estuaries etc. are open channels. The flow in an open channel or in a closed conduit having a free sur
abstemious
发表于 2025-3-25 08:17:20
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上涨
发表于 2025-3-25 12:14:13
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恶臭
发表于 2025-3-25 18:14:25
Uniform Flow,m slope is negative), whereas the shear stressat the channel bottom and sides offers resistance to flow. Depending upon the relative magnitude of these accelerating and decelerating forces, the flow may accelerate or decelerate. For example, if the resistive force is more than the component of the w
aneurysm
发表于 2025-3-25 23:17:50
Gradually Varied Flow,e., the channel cross section and bottom slope do not change with distance). In real-life projects, however, channel cross sections and bottom slopes are not constant with distance in natural channels and these are varied in constructed channels to suit the existing topographical conditions for econ
linguistics
发表于 2025-3-26 03:49:26
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epidermis
发表于 2025-3-26 07:34:25
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向下五度才偏
发表于 2025-3-26 09:41:35
Computation of Rapidly Varied Flow,lway chutes, conveyance channels, sewer systems, and outlet works. Unlike the case of gradually varied flows, a number of difficulties, such as the formation of roll waves, air entrainment, and cavitation, are encountered in the analysis of these flows. In addition, instabilities may develop if the
出没
发表于 2025-3-26 13:05:12
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驾驶
发表于 2025-3-26 17:57:58
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