Physics Maths Engineering
Accuracy Assessment of Surveying Strategies for the Characterization of Microtopographic Features That Influence Surface Water Flooding
Rakhee Ramachandran,
Yadira Bajón Fernández,
Ian Truckell,
Carlos Constantino,
Richard Casselden,
Paul Leinster,
Mónica Rivas Casado
Peer Reviewed
Abstract
Key Questions about Surveying Strategies for Flood Studies
The article "Accuracy Assessment of Surveying Strategies for the Characterization of Microtopographic Features That Influence Surface Water Flooding" evaluates two common surveying methods used in flood studies:
- Unmanned Aerial Systems (UAS) with RGB Imaging (S1): Utilizes drones equipped with standard color cameras to capture high-resolution images.
- Manned Aircraft with LiDAR Scanning (S2): Employs piloted aircraft equipped with Light Detection and Ranging (LiDAR) technology to generate detailed topographic data.
The study assesses the elevation differences and accuracy levels between these methods across various land uses and microtopographic flood features. Findings indicate that elevation differences between S1 and S2 range from 11 cm to 37 cm, with S1 accuracy varying between 3 cm and 70 cm, and S2 accuracy between 3.8 cm and 30.3 cm. These results suggest that the choice of surveying strategy should be tailored to the specific flood features under investigation. :contentReference[oaicite:3]{index=3}
1. How do Unmanned Aerial Systems (UAS) with RGB imaging compare to manned aircraft with LiDAR scanning in surveying microtopographic features?
The study found that UAS with RGB imaging (S1) and manned aircraft with LiDAR scanning (S2) differ in elevation measurements, with differences ranging from 11 cm to 37 cm across various land uses and flood features. Accuracy levels also vary, with S1 ranging from 3 cm to 70 cm and S2 from 3.8 cm to 30.3 cm. :contentReference[oaicite:4]{index=4}
2. What factors influence the selection of a surveying strategy for flood studies?
The choice between UAS with RGB imaging and manned aircraft with LiDAR scanning should be based on the specific flood features of interest, as each method offers distinct advantages and limitations depending on the microtopographic characteristics of the area. :contentReference[oaicite:5]{index=5}
