气候变化领域集成服务门户(CCPortal): Nearshore Monitoring With X-Band Radar: Maximizing Utility in Dynamic and Complex Environments

CCPortal

DOI	10.1029/2020JC016841
	Nearshore Monitoring With X-Band Radar: Maximizing Utility in Dynamic and Complex Environments
	Atkinson J.; Esteves L.S.; Williams J.J.; Bell P.S.; McCann D.L.
发表日期	2021
ISSN	21699275
卷号	126 期号:4
英文摘要	Coastal management and engineering applications require data that quantify the nature and magnitude of changes in nearshore bathymetry. However, bathymetric surveys are usually infrequent due to high costs and complex logistics. This study demonstrates that ground-based X-band radar offers a cost-effective means to monitor nearshore changes at relatively high frequency and over large areas. A new data quality and processing framework was developed to reduce uncertainties in the estimates of radar-derived bathymetry and tested using data from an 18-months installation at Thorpeness (UK). In addition to data calibration and validation, two new elements are integrated to reduce the influence of data scatter and outliers: (a) an automated selection of periods of “good data” and (b) the application of a depth-memory stabilization. For conditions when the wave height is >1 m, the accuracy of the radar-derived depths is shown to be ±0.5 m (95% confidence interval) at 40 × 40-m spatial resolution. At Thorpeness, radar-derived bathymetry changes exceeding this error were observed at time scales ranging from 3 weeks to 6 months. These data enabled quantification of changes in nearshore sediment volume at frequencies and spatial cover that would be difficult and/or expensive to obtain by other methods. It is shown that the volume of nearshore sediment movement occurring at time scale as short as few weeks are comparable with the annual longshore transport rates reported in this area. The use of radar can provide an early warning of changes in offshore bathymetry likely to impact vulnerable coastal locations. © 2021. The Authors.
英文关键词	bathymetry; coastal monitoring; data quality assessment; nearshore; uncertainty; X-band radar
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186364
作者单位	Faculty of Science and Technology, Bournemouth University, Poole, United Kingdom; Now at Ørsted UK, Howick Place, London, United Kingdom; Ports, Coastal and Offshore, Mott MacDonald Ltd., Croydon, United Kingdom; National Oceanography Centre, Liverpool, United Kingdom
推荐引用方式 GB/T 7714	Atkinson J.,Esteves L.S.,Williams J.J.,et al. Nearshore Monitoring With X-Band Radar: Maximizing Utility in Dynamic and Complex Environments[J],2021,126(4).
APA	Atkinson J.,Esteves L.S.,Williams J.J.,Bell P.S.,&McCann D.L..(2021).Nearshore Monitoring With X-Band Radar: Maximizing Utility in Dynamic and Complex Environments.Journal of Geophysical Research: Oceans,126(4).
MLA	Atkinson J.,et al."Nearshore Monitoring With X-Band Radar: Maximizing Utility in Dynamic and Complex Environments".Journal of Geophysical Research: Oceans 126.4(2021).