Effect of Rain on Surface Reaeration
Effect of Rain on Surface Reaeration
复制标题
雨水对地表反应的影响
DOI：
10.1061/(asce)0733-9372(1984)110:1(1
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发表时间：
1984
影响因子：
2.2
通讯作者：
B. Lohani
中科院分区：
文献类型：
--
作者：
R. Banks;G. Wickramanayake;B. Lohani
任何在水面或水面附近产生湍流的机制都将倾向于增加氧气在水面上的传输速率。机械混合、风的作用和表面波都是这种机制的例子。在此基础上，似乎很明显，落在水体上的雨水是产生表面湍流的另一种机制。通过108个实验室实验对这一现象进行了研究。试验变量为降雨率、雨滴直径和冲击速度、混合叶轮的旋转速度和收集槽深度。从这些实验中可以确定，氧传递系数与降雨的功率成正比。它的结论是，在一段较长的时间内，沉重的martamalls可能有助于显着的整体氧平衡的水体。
Any mechanism which creates turbulence at or near a water surface will tend to increase the rate of oxygen transfer across the surface. Mechanical mixing, wind action, and surface waves are examples of such mechanisms. On this basis, it seems apparent that rain falling on a body of water is another mechanism for the creation of surface turbulence. This phenomenon was examined by conducting 108 laboratory experiments. Test variables were rainfall rate, raindrop diameter and impact velocity, rotational velocity of a mixing impeller, and collector tank depth. From these experiments it was determined that the oxygen transfer coefficient is directly proportional to the power of the rainfall. It is concluded that heavy rainfalls over an extended period of time may contribute significantly to the overall oxygen balance in a body of water.