LiDAR-generated maps to be used for flood management

LiDAR-generated maps to be used for flood management

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Philippines: Topographic maps generated by light-detection and ranging (LiDAR) will be used in flood modeling for disaster risk areas in the Davao region in Philippines.

The LiDAR-generated maps will have high resolution of 1:2,500 scale, more detailed than the 1:10,000 geohazard maps of the Mines and Geosciences Bureau, said Anthony C. Sales, regional director of the Department of Science and Technology (DOST) 11.

He explained that the topographic maps will show elevations up to barangay level, citing that the “real” terrain can be identified with the three-dimensional (3D) maps of areas.

Among the details are houses, buildings and other infrastructures and vegetation in the area, he cited.

LiDAR mapping of the city and Compostela Valley had been completed, while that of Davao Oriental will follow immediately, he said, adding that the maps will be available before the end of February.

Noting that a LiDAR-generated map will be useful in flood modeling, he said it indicates the path of water from the rivers when they overflow, thus showing areas that will be flooded.

With these maps, he said, “We will know the estimate damage cost of a disaster, including the number of houses that will be affected.”

The Disaster Risk Exposure Assessment for Mitigation-LiDAR is one of the eight components of the DOST’s Project National Operational Assessment of Hazards (NOAH).

Other components of the project are the Distribution of Hydrometeorological Devices in hard-hit areas in the Philippines (Hydromet), Enhancing Geohazards Mapping through LiDAR, Coastal Hazards and Storm Surge Assessment and Mitigation (CHASSAM), Flood Information Network (FloodNET) Project, Local Development of Doppler Radar Systems (LaDDeRS), Landslide Sensors Development Project, and Weather Hazard Information Project (WHIP).

Source: Minda News