High Risk Flood Zones Determination Surveying Services
The growing popularity of theairborne LiDAR surveyingis greatly due by its use forriver overflowandfloodplain analyses, and contributed significantly to the progress of the technology. Group PHB has been involved in airborne LiDAR surveys of floodplains since the earliest stages of this technology that started in early 1990.
Hydrology and floodplain analysis
Group PHB has been retained as the airborne LiDAR surveys contractor to provide precise topographic mapping of the Red River basin in Manitoba thatfacilitated significantly the determination of the zones at risk for potential floodingbased on the ground relief, combined with precipitation amplitude statistics and drainage capacity records of the existing water courses.
Group PHB`s recent airborne LiDAR surveys along the St. Lawrence River in the Province of Quebec helped extensively the confection of precise topographic which have been dedicated to hydrology studies and the risk management of overflow due to excessive precipitations or due to formation of ice jams that periodically occur in early spring.
Our latest airborne LiDAR surveys enabled the evaluation of the apprehended financial consequences ofpotential flooding of urban areasneighboring the Chateauguay River in the Province of Quebec.
All these studies led to the integration of the risk sectors into the overall urban planning and to elaborate control measures and damage reduction procedures.
The combined use of airborne LiDAR data, associated with various available records and information, such aswater quality,water flow and drainage,sediment transportandglobal water level fluctuationsprovide a solid input for following activities:
- Confection of three-dimensional models enabling dyking studies;
- Creation of models that enable most respectful integration studies of urban zones with flora and wild life habitats and permit eventual impact tracking;
- Production of precise topographic maps for the delineation of zones affected by potential inundation risks;
Combination and overlaying topographic information with urban planning schemes forenvironmental controlandvulnerability reductionof urban zones.