* *估计水的浊度的一种方法在该领域是使用一个浊度管。到目前为止,我发现两个来源在哪里可以了解南大标记沿管的位置。PDF文件(浊度管:简单和精确测量浊度的领域][1]——最初由伊丽莎白Myre &瑞安·肖(密歇根科技)[2]是一个很好的介绍的概念,概述了如何构建一个浊度管从简单的材料和使用它,并提供一个表的数据,有以下描述:>(华盛顿大学扩展,2003)。多个表的目前使用稍微不同的转换。此表从备选方案中选择因为来源的可靠性和更保守的值比其他表。选择科学在澳大利亚销售专业(两件浊度管)[3]和[一个图像][4]([这][5])包括照片长度范围内,标记位置可以被估计。下面我做了一个粗略的阴谋,他们是明显不同的。这并不奇怪,因为有不同的意见和建设以及区别。有任何进一步的指导,我已经错过了吗?任何进一步的建议之前,我做一个,试一试? Of course I'll include a centimeter scale so that it can be converted later, but sooner or later I'll need to settle down and choose a conversion. [![enter image description here][6]][6] **above:** plot of some estimates for position of NTU markings on a turbidity tube as a function of distance from the bottom in centimeters. The solid line is tabulated data in the Michigan Tech PDF, the dashed line is estimated from the Select Scientific photo. Curves are from the equations below. Since they are power-law, they show as straight lines on the log-log plot on the right. $$NTU_{SelSci} \approx 1420 \times H_{cm}^{-1.259}$$ $$NTU_{MTech} \approx 4043 \times H_{cm}^{-1.511}$$ [1]: http://www.virginia.edu/blandy/blandy_web/education/Bay/TurbidityTubeConstruction&Use_Myre_Shaw.pdf [2]: http://www.mtu.edu/cee/ [3]: http://selectscientific.com.au/turbidity-tube.html [4]: https://i.stack.imgur.com/qXaPN.jpg [5]: http://selectscientific.com.au/media/catalog/product/cache/8/thumbnail/600x/17f82f742ffe127f42dca9de82fb58b1/t/u/turbidity-tube_1.jpg [6]: https://i.stack.imgur.com/ij2Gl.png