Abstract
This paper provides an overview of recent advancements in river measurement methods. Non-contact methods, that have been developing and becoming popular over the past 20 years, are categorized into three types: 1) ground-based, 2) airborne, and 3) spaceborne. In-situ measurements are also discussed, by focusing on different approaches and the properties targeted for measurements. The paper additionally addresses how to share and pre-condition collected data. Recent developments in data processing, analysis, and uncertainty assessments are summarized. The paper finally outlines potential areas for future research and exploration.
