Management System for Dam-Break Hazard Mapping in a Complex Basin Environment
Abstract
:1. Introduction
2. Study Area
3. Methodology
3.1. Research Framework
3.2. Data Integration
3.2.1. Establishing Database for Dam-Break Hazard Mapping
3.2.2. Spatializing the Results of Hydrological Calculation
- (1)
- Read the .txt file by coding.
- (2)
- Traverse the file content, read every element by rows, store the point ID and coordinates in a memtable “datatable1”, before storing the information of hydraulic elements and grid point in “datatable2”.
- (3)
- Generate a polygon shapefile using the program.
- (4)
- Traverse the elements in each row in datatable2 and find the corresponding point coordinates from datatable1. Generate polygons using the program and type the attribute information into the corresponding generated shapefile.
3.3. Simulation of Dam Break
3.3.1. Simulation of the Breach Flow Process Line
3.3.2. Two-Dimensional Analysis of Dam-Break Flood Evolution
- (1)
- Determine the scope of the possible maximum flood inundated areas according to the topographic feature, distribution of flood control project, and historical flood scope.
- (2)
- Grid transform for maximum flood inundated area, set the inner boundary conditions in addition to generating the terrain data and roughness data input grid.
- (3)
- Set the outside boundary conditions on the regional boundary grid cell (according to flood control scheduling scheme or dam-break history and obtain the corresponding flow process, water level, discharge flow process, or water flow relations, etc.).
- (4)
- Under the premise of considering computational efficiency and precision, determine the computational time step, solve the hydraulic elements such as water depth, flow velocity, and flow direction on each grid cell for the entire basin.
- (5)
- Obtain the submerged depth, range of maximum velocity, maximum flood range, and flood duration information about each grid cell under different dam-break schemes.
3.3.3. Design of Flood Hazard Map Management System Framework Based on a Client/Server Structure
4. Results and Discussion
4.1. Analysis of Dam-Break Flood
4.2. Flood Maps
4.3. Dam-Break Loss Evaluation
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Categories | Data Contents | |
---|---|---|
Current data | Basic geographical data | Basic arrow data on geological information, including large-scale administration divisions, roads, lake and water systems, and lattice spatial data for the digital elevation model |
Measurement data Hydrologic data | River cross-section data obtained from digital field maps for plotting key areas Type of dam/length/dead storage/design storage/upland water flow/upstream water depth | |
Socio-economic survey data | Population/cultivated area/industrial and commercial enterprises/gross floor area/infrastructure | |
Documentary information | Relevant statistical records of historical disasters, photos, and technical reports | |
Historical data | Historical disaster data | Flood frequency information/catchment point information (depth/area/duration)/history of disaster losses/historical hydro-meteorological data |
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Mao, J.; Wang, S.; Ni, J.; Xi, C.; Wang, J. Management System for Dam-Break Hazard Mapping in a Complex Basin Environment. ISPRS Int. J. Geo-Inf. 2017, 6, 162. https://doi.org/10.3390/ijgi6060162
Mao J, Wang S, Ni J, Xi C, Wang J. Management System for Dam-Break Hazard Mapping in a Complex Basin Environment. ISPRS International Journal of Geo-Information. 2017; 6(6):162. https://doi.org/10.3390/ijgi6060162
Chicago/Turabian StyleMao, Jian, Shandong Wang, Jianhua Ni, Changbai Xi, and Jiechen Wang. 2017. "Management System for Dam-Break Hazard Mapping in a Complex Basin Environment" ISPRS International Journal of Geo-Information 6, no. 6: 162. https://doi.org/10.3390/ijgi6060162