Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026810 |
A Technical Evaluation of Lidar-Based Measurement of River Water Levels | |
Paul, Jonathan D.1,2; Buytaert, Wouter1; Sah, Neeraj1 | |
2020-04-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2020 |
卷号 | 56期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | Measuring river water level (stage) is key for a variety of applications including discharge estimation and flood prediction. Although a variety of in situ and noncontact methods are available, there is an urgent need for new and more cost-efficient methods. Rapid technological progress has accelerated the use of noncontact methods and development of time-of-flight distance sensors. Among available techniques, the use of lidar for distance measurement is promising because of its low cost, high energy efficiency, and small measurement footprint. However, lidar has rarely been used to measure water levels. Here we test a near-infrared (905 nm) lidar sensor to determine its suitability for stage measurements under a range of environmental conditions. Using different laboratory and field setups, we assess sensor performance as a function of measurement distance, surface roughness, air temperature, water turbidity, and measurement angle. Despite the low reflectivity of water for infrared radiation, we find that the tested sensor is able to take measurements under all tested conditions, up to an incidence angle of similar to 40 degrees. The accuracy of the sensor is within the technical specifications of the device and is characterized by a relative error of around 0.1%. We find a strong dependence of the accuracy on sensor temperature, which we attribute to suboptimal internal compensation of the electronics. The precision of the sensor decreases with increasing measured distance and increases with surface roughness of the water body. We did not find any significant impact of water turbidity on the measurements. Key Points We describe a new noncontact lidar prototype to measure river water level The prototype can take measurements under a range of environmental conditions, to similar to 35 m range, and to inclinations of similar to 40 degrees Lidar has the potential to enrich the observational database in data-scarce regions globally |
英文关键词 | lidar river stage water-level measurement |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000538987800036 |
WOS关键词 | LASER ; GENERATION ; TURBIDITY |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280626 |
专题 | 资源环境科学 |
作者单位 | 1.Imperial Coll London, Dept Civil & Environm Engn, London, England; 2.Royal Holloway Univ London, Dept Earth Sci, London, England |
推荐引用方式 GB/T 7714 | Paul, Jonathan D.,Buytaert, Wouter,Sah, Neeraj. A Technical Evaluation of Lidar-Based Measurement of River Water Levels[J]. WATER RESOURCES RESEARCH,2020,56(4). |
APA | Paul, Jonathan D.,Buytaert, Wouter,&Sah, Neeraj.(2020).A Technical Evaluation of Lidar-Based Measurement of River Water Levels.WATER RESOURCES RESEARCH,56(4). |
MLA | Paul, Jonathan D.,et al."A Technical Evaluation of Lidar-Based Measurement of River Water Levels".WATER RESOURCES RESEARCH 56.4(2020). |
条目包含的文件 | 条目无相关文件。 |
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