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Review
. 2022 Aug 27;9(1):525.
doi: 10.1038/s41597-022-01658-y.

Two multi-temporal datasets to track debris flow after the 2008 Wenchuan earthquake

Lei Wang  1   2 , Ming Chang  3 , Jian Le  2 , Lanlan Xiang  1 , Zhang Ni  1
Affiliations
Review

Two multi-temporal datasets to track debris flow after the 2008 Wenchuan earthquake

Lei Wang et al. Sci Data. .

Abstract

We provide two datasets for tracking the debris flow induced by the 2008 Wenchuan Mw 7.9 earthquake on a section of the Longmen mountains on the eastern side of the Tibetan plateau (Sichuan, China). The database was obtained through a literature review and field survey reports in the epicenter area, combined with high-resolution remote sensing image and extensive data collection and processing. The first dataset covers an area of 892 km2, including debris flows from 2008 to 2020 (an updated version). 186 debris flows affecting 79 watersheds were identified. 89 rainfall stations were collected to determine the rainfall events for the post-earthquake debris flow outbreak. The second database is a list of mitigation measures for post-earthquake debris flows, including catchment name, check dam number, coordinates, construction time, and successful mitigation date. The datasets can aid different applications, including the early warning and engineering prevention of post-earthquake debris flow, as well as provide valuable data support for research in related disciplines.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Fig. 1
Fig. 1
General view of the study area and the flow chart in Wenchuan Country, Sichuan, China; (a) details of the area in which the multi-temporal dataset was carried out, details of the area in which debris flows were recorded, with the indication of rain gauges and check dam; (b) flow chart of the database construction.
Fig. 2
Fig. 2
The classification standard of rainfall events used in the study. (The classification standard of rainfall events in this study by Zhou et al., 2013).
Fig. 3
Fig. 3
The catastrophic debris flows in the study area and the corresponding daily rainfall.
Fig. 4
Fig. 4
Time span of collected rainfall data in the database from 2008 to 2020.
Fig. 5
Fig. 5
Catastrophic debris flow and rainstorm in the study area. (a) Hourly and accumulated precipitation in the Hongchun catchment on August 14, 2010 (C_ID W25). A rainfall station in the Yingxiu catchment recorded rainfall data; (b) hourly and accumulated precipitation in the Er catchment on July 10, 2013 (C_ID W7). Rainfall data was recorded by a rainfall gauge located in Er. (c) Hourly and accumulated precipitation in the Cutou catchment (C_ID W70), caused catastrophic debris flow on August 20, 2019. (d) Hourly and accumulated precipitation in the Taoguan catchment (C_ID W48).
Fig. 6
Fig. 6
Mitigation measures, successful debris flow prevention, and control cases in the study area. (a,b) check dam in Qipan catchment after the 2013 debris flow; (c) remote sensing image after 20 August 2019 debris flow in Qipan catchment; (d) remote sensing image before 2013 in Qipan catchment; (e) UAV image in Shaofang catchment after 2010; and (f) the period of effective debris flow mitigation measures in the study area.
See this image and copyright information in PMC

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