Regional Planning Approach to Protect Surrounding Towns and Villages in the Event of Dam Break
Case Study of AghChay Dam
Bibliographic Data
| ID | 21738188 |
|---|---|
| Authors | Nader Zali (0000-0003-2972-4750, Associate Professor, Dept. of Urban Planning, Univ. of Guilan, Rasht 4199613776, Iran (corresponding author), corresponding author), Nasrollah Molaei Hashjin (Professor, Dept. of Geography, Islamic Azad Univ., Rasht Branch, Rasht 4147654919, Iran), Sahand Taghizadeh (University of Guilan) |
| Year | 2021 |
| Volume | 22 |
| Issue | 4 |
| Publication date | 2021-11-01 |
| Open Access | No |
| Type | ARTICLE |
| Venue | Natural Hazards Review (JOURNAL) |
| Journal identifiers | ISSN: 1527-6988 • E-ISSN: 1527-6996 |
| Publisher | American Society of Civil Engineers (ASCE) (PUBLISHER • US) |
| DOI | 10.1061/(asce)nh.1527-6996.0000503 |
| OpenAlex | W3188859688 |
| Language | EN |
| References cited | 26 |
AghChay Dam is located in northwestern Iran in West Azerbaijan Province and is built on the AghChay River. There are many settlements and features situated downstream of the dam, and in the case of a probable break of AghChay Dam, there would likely be significant casualties and financial loss in the region. Therefore, modeling and mapping dam break–induced flooding and identifying high-hazard zones is of utmost importance in order to manage and mitigate flood hazards and also to devise emergency plans. In this paper, using four indices—flood depth, flood velocity, flood arrival time, and hazard index—flood zoning is carried out and flood hazards are assessed in two overtopping and piping scenarios. The goal is to simulate the flood and prepare flood maps for the desired indices and evaluate flood effects on the area. Accordingly, parts of the different layers of data are extracted using Google Earth and Global Mapper applications at the beginning. Then, the data are entered into the Hydraulic Engineering Center’s River Analysis System (HEC-RAS) application, and after specifying the roughness coefficient, discretization of the domain, and entering the dam information, the simulation is done and zoning maps of the indices are produced. Finally, some maps are edited using the QGIS application. The results indicate that, in modeled scenarios, considerable parts of the area and the agricultural lands are inundated and many features and settlements are placed in seriously hazardous zones. AghChay Dam is destroyed after 25 min in the piping scenario and after 45 min in the overtopping scenario, and 16 and 18 settlements are inundated, respectively. Moreover, out of three important access roads, 10 bridges, and three significant historical monuments, only one of the historical monuments is located in the secure zone. Furthermore, flood arrival time, maximum velocity, depth, and type of hazard zone are extracted for each feature
100-year flood · Cartography · Civil engineering · Flood myth · Flood stage · Floodplain · Geography · Geotechnical engineering · Hazard · Human settlement · Water resource management · Zoning · Dam Engineering and Safety · Engineering · Environmental Science · Flood Risk Assessment and Management · Hydrology and Watershed Management Studies · Geology
| Highly cited | No |
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