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Riverbank mapping for flood monitoring with drones

Published by Josh Spires on 23 August, 2021

Riverbank mapping for flood monitoring with drones

DDT-31 is a French Department of Territory Management. DDT stands for Direction Départamentale des Territoires, with the "31" referring to the Haute-Garonne department which is in the Occitania region.

The Need

The primary purpose of this project was to collect insights during a flood in the Garonne River in Toulouse, France so that it could be analysed and compared to historical data. The secondary purpose was to analyse the riverbanks after the flood to determine if fallen trees or other debris caused obstruction to the river and its banks.

The Solution

To address the needs of DDT-31, Delair deployed the BVLOS-certified DT18 long range UAV system equipped with an industrial RGB sensor. The high endurance of the DT18 allows operators to cover long linear distances or large areas in a single flight – in this case, a 360-ha section of the Garonne River. The DT18 flew along the Garonne River, out of sight of the operator, and collected over 15km of data.

The Operation

In November 2014, the DT18 accomplished as part of a bigger mission, a 1-hour flight above the Garonne River and covered 15km of corridor. 2 000 images were acquired and then processed on the Delair cloud platform. The resolution of this data set was 4.12cm per pixel.

Putting the data to work. After the flight, the data was uploaded to the Delair’s cloud base platform to be processed. The results were ready to be delivered after 24 hours, which is ideal when every minute counts during emergency situations. The high resolution of the created map allowed the responders to clearly observe fallen trees and other objects obstructing the river.

  • Long range UAV allowing to cover more kilometers per flight
  • The cloud-based platform efficiency enables quick turnaround on reporting and processing
  • Reactive tool to detect obstructions

Source: Delair

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