| Summary: | 碩士 === 國立臺灣大學 === 工程科學及海洋工程學研究所 === 105 === In Taiwan''s water conservancy projects and reservoirs, the suspended sediment concentration is an important hydrological observation information, on the one hand can become a very important assessment indicator of water ecological environment, on the other hand, a good monitoring of suspended sediment concentration can effectively control the quality of water in the reservoir, by the above reasons can achieve a purpose of protecting the reservoir and sustainable operation.
The instrument and equipment used in this paper are different from the previous suspended concentration measurement, the system use a new and automated technology, covering automated measurement, real-time transmission, automatic recording and other highly automated features to achieve the minimum human needs.
In addition, because of the software, hardware and transducers are self-developed, so the cost can be effectively controlled, even let us can set up much more observatories in the same reservoir with same resources to enhance the comprehensive of concentration of the measurement.
In terms of technology, the usually used of optical turbidity meter, the principle is that the light through the water scattering or absorption of light, rather than along the straight line of the optical characteristics of the characterization; and this study use ultrasonic wave to implement, ultrasonic wave is a fast, non-invasive measurement technology, can be a wide range of suspended particles for measurement, and then use algorithms for analysis to achieve the required description. The results show that we can get a linear relationship in the rating curve, it can be more accurate and more stable measurement of concentration.
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