إدارة الفيضانات
رسالة ماجستير في الهندسة المساحية من كندا بعنوان
Three Dimensional Flood Modeling
with High Resolution LIDAR
By: Edward MacKinnon, 2004
الملخص:
Abstract :
Several Flood
Simulation products can be modeled using LIDAR, GIS and Remote Sensing tools.
Flood risk, extent and depth maps represented by actual storm surge flood
events were generated from high resolution LIDAR surfaces with a GIS. These products
provide valuable information for strategic planning to help prevent coastal
flood damage.
The main purpose of
this project was to generate flood maps and DEMs with better than 30 cm vertical
accuracy for the coastal area of southeastern New Brunswick in support of
Climate Change Action Fund (CCAF) Project A591. The CCAF project is a venture
partnered with Environment Canada, Geological Survey of Canada, Natural
Resources Canada, New Brunswick Resources and Energy, Parks Canada, Universite de Moncton , Nova Scotia Community College and the University of New Brunswick
Airborne LIDAR
systems can obtain high-resolution elevation data that can be processed to
produce accurate topographic representations. The LIDAR sensor emits a series
of near-infrared laser pulses toward the surface and records the time
difference between the contact with the surface and the return to the sensor
after reflection. The aircraft uses a high precision global positioning system
and an inertial measurement unit to determine the ******** and attitude of the
aircraft so that the ground ******** of the return laser pulse can be
determined. This project used LIDAR data to produce accurate representations of
the landscape and to provide accurate hydrological bare earth DEMs that are
necessary to perform accurate flood risk modelling. Flood level data were
provided by CCAF project partners, and used to flood landward areas. The
highest experienced water level in the region occurred during a storm surge on
January 21, 2000 that caused extensive coastal damage to the area. The extreme
high-water mark for this event was recorded as 3.6 m above Chart Datum and was used as the
first modeled water level. The second water level was ****d on the January 2000
level plus an estimated 100 year predicted 70 cm relative sea-level rise with extreme
conditions. The third level was ****d on the January 2000 level plus an
estimated 100 year predicted 50 cm relative sea-level rise with moderate
conditions.
The main study
area was divided into ten sections located along the Gulf Shore of New
Brunswick from Kouchibouguac National Park south
along the coast to Jourimain Island
:
Three Dimensional Flood Modeling with High Resolution LIDAR
Three Dimensional Flood Modeling with High Resolution LIDAR
By: Edward MacKinnon, 2004 .
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