GIS tools for preliminary debris-flow assessment at regional scale

被引:0
作者
CAVALLI Marco [1 ]
CREMA Stefano [1 ,2 ]
TREVISANI Sebastiano [3 ]
MARCHI Lorenzo [1 ]
机构
[1] Consiglio Nazionale delle Ricerche, Istituto di Ricerca per la Protezione Idrogeologica
[2] Università di Padova, Dipartimento Territorio e Sistemi Agro-forestali
[3] Università IUAV di Venezia, Dipartimento di Architettura Costruzione Conservazione
关键词
Debris flow; Geographic information system; Digital elevation models; Runout; Alluvial fan; Watershed management; Geomorphometry;
D O I
暂无
中图分类号
P208 [测绘数据库与信息系统]; P642.23 [泥石流];
学科分类号
070503 ; 081603 ; 0818 ; 081802 ; 0837 ;
摘要
The assessment of the areas endangered by debris flows is a major issue in the context of mountain watershed management. Depending on the scale of analysis, different methods are required for the assessment of the areas exposed to debris flows.While 2-D numerical models are advised for detailed mapping of inundation areas on individual alluvial fans, preliminary recognition of hazard areas at the regional scale can be adequately performed by less data-demanding methods, which enable priority ranking of channels and alluvial fans at risk by debris flows. This contribution focuses on a simple and fast procedure that has been implemented for regionalscale identification of debris-flow prone channels and prioritization of the related alluvial fans. The methodology is based on the analysis of morphometric parameters derived from Digital Elevation Models(DEMs). Potential initiation sites of debris flows are identified as the DEM cells that exceed a threshold of slope-dependent contributing area. Channel reaches corresponding to debris flows propagation, deceleration and stopping conditions are derived from thresholds of local slope. An analysis of longitudinal profiles is used for the computation of the runout distance of debris flows. Information on erosion-resistant bedrock channels and sediment availability surveyed in the field are taken into account in the applications. A set of software tools was developed and made available(https://github.com/Hydrogeomorphology Tools) to facilitate the application of the procedure. This approach, which has been extensively validated by means of field checks, has been extensively applied in the eastern Italian Alps. This contribution discusses potential and limitations of the method in the frame of the management of small mountain watersheds.
引用
收藏
页码:2498 / 2510
页数:13
相关论文
共 17 条
  • [1] On the criteria to create a susceptibility map to debris flow at a regional scale using Flow-R[J]. PASTORELLO Roberta,MICHELINI Tamara,D’AGOSTINO Vincenzo.Journal of Mountain Science. 2017(04)
  • [2] Two-dimensional simulation of debris flows over mobile bed: Enhancing the TRENT2D model by using a well-balanced Generalized Roe-type solver[J] . Giorgio Rosatti,Lorenzo Begnudelli.Computers and Fluids . 2013
  • [3] Debris-flow susceptibility of upland catchments
    Bertrand, Melanie
    Liebault, Frederic
    Piegay, Herve
    [J]. NATURAL HAZARDS, 2013, 67 (02) : 497 - 511
  • [4] Flow-R, a model for susceptibility mapping of debris flows and other gravitational hazards at a regional scale[J] . P. Horton,M. Jaboyedoff,B. Rudaz,M. Zimmermann.Natural Hazards and Earth System Science . 2013 (4)
  • [5] An objective approach for feature extraction: distribution analysis and statistical descriptors for scale choice and channel network identification[J] . Sofia G.,Tarolli P.,Cazorzi F.,Dalla Fontana G..Hydrology and Earth System Sciences . 2011 (139)
  • [6] Debris flow hazard modelling on medium scale: Valtellina di Tirano, Italy[J] . Blahut J.,Horton P.,Sterlacchini S.,Jaboyedoff M..Natural Hazards and Earth System Science . 2010 (122)
  • [7] Chapter 23 Modelling Mass Movements and Landslide Susceptibility[J] . S. Gruber,C. Huggel,R. Pike.Developments in Soil Science . 2009
  • [8] Magnitude–frequency relationships of debris flows — A case study based on field surveys and tree-ring records[J] . Markus Stoffel.Geomorphology . 2009 (1)
  • [9] LiDAR-derived slopes for headwater channel network analysis[J] . Alessandro Vianello,Marco Cavalli,Paolo Tarolli.Catena . 2008 (2)
  • [10] Procedures for the Documentation of Historical Debris Flows: Application to the Chieppena Torrent (Italian Alps)[J] . Lorenzo Marchi,Marco Cavalli.Environmental Management . 2007 (3)