Deriving landslide dam geometry from remote sensing images for the rapid assessment of critical parameters related to dam-breach hazards
- 963 Downloads
Dam-breaches that cause outburst floods may induce downstream hazards. Because landslide dams can breach soon after they are formed, it is critical to assess the stability quickly to enable prompt action. However, dam geometry, an essential component of hazard evaluation, is not available in most cases. Our research proposes a procedure that utilizes post-landslide orthorectified remote sensing images and the pre-landslide Digital Terrain Model in the Geographic Information System to estimate the geometry of a particular dam. The procedure includes the following three modules: (1) the selection of the reference points on the dam and lake boundaries, (2) the interpolation of the dam-crest elevation, and (3) the estimation of dam-geometry parameters (i.e., the height, length, and width), the catchment area, the volumes of barrier lake and landslides dam. This procedure is demonstrated through a case study of the Namasha Landslide Dam in Taiwan. It was shown the dam-surface elevation estimated from the proposed procedure can approximate the elevation derived from profile leveling after the formation of the landslide dam. Thus, it is feasible to assess the critical parameters required for the landslide dam hazard assessment rapidly once the ortho-photo data are available. The proposed procedure is useful for quick and efficient decision making regarding hazard mitigation.
KeywordsLandslide dam Hazards Remote sensing image Digital terrain model
This work was supported by the National Science Council of the Republic of China (Taiwan) under contract nos. NSC 99-2625-M-009-004-MY3 and NSC 99-2116-M-008-028. This support is gratefully acknowledged. The authors are grateful to editor and two reviewers for they provided very constructive comments.
- Chen SC, Hsu CL (2009) Landslide dams induced by Typhoon Morakot and its risk assessment. Sino–Geotechnics 122:77–86, in ChineseGoogle Scholar
- Costa JE (1985) Floods from dam failures. US Geological Survey, Open-File Report 85–560:54Google Scholar
- Creager WP, Justin JD, Hinds J (1950) Engineering for Dams. 4th printing. John Wiley & Sons, New YorkGoogle Scholar
- Evans SG, Delaney KB, Hermanns RL, Strom A, Scarascia-Mugnozza G (2011) The formation and behaviour of natural and artificial rockslide dams: implications for engineering performance and hazard management. In: Evans SG, Hermanns RL, Strom A, Scarascia-Mugnozza G (eds) Natural and artificial rockslide dams: lecture notes in Earth Sciences, 133rd edn. Springer, Berlin. doi: 10.1007/978-3-642-04764-0_1 CrossRefGoogle Scholar
- Fan X, van Westen CJ, Korup O, Gorum T, Xu Q, Dai F, Huang R, Wang G (2012a) Transient water and sediment storage of the decaying landslide dams induced by the 2008 Wenchuan earthquake, China. Geomorphology 171:58–68Google Scholar
- Fan X, van Westen CJ, Xu Q, Gorum T, Dai F (2012b) Analysis of landslide dams induced by the 2008 Wenchuan earthquake. J Asian Earth Sci 57:5–37Google Scholar
- Schuster RL, Costa JE (1986) A perspective on landslide dams. In: Schuster, R.L. (ed.) Landslide dam: processes risk and mitigation: ASCE Geotechnical Special Publication 3:1–20Google Scholar
- Shieh CL, Tsai YF (1997) Experimental study on the configuration of debris-flow fan, Proc., the First International Conference on Debris-flow Hazards Mitigation: Mechanics, Prediction and Assessment. ASCE, New York, pp 133–142Google Scholar
- Sung QC, Lin CW, Lin WH, Lin WC (2000) Explanatory text of the geologic map of Taiwan. Chiahsien sheet, scale 1/50,000. Central Geological Survey. Ministry of Economic Affairs, Taiwan, p 57Google Scholar
- Taiwan Forestry Bureau (2010) Investigations and strategy for hazard mitigation of the Namasha and Shih-Wun landslide dam. Research report of Forestry Bureau, TaiwanGoogle Scholar
- Yang SH, Pan YW, Dong JJ, Yeh KC, Liao JJ (2012) A systematic approach for the assessment of flooding hazard and risk associated with a landslide dam. Nat Hazard 65:41–62Google Scholar