{"id":14634,"date":"2026-01-31T08:04:30","date_gmt":"2026-01-31T08:04:30","guid":{"rendered":"https:\/\/blog.geostru.eu\/la-frana-di-niscemi-analisi-del-rischio-idrogeologico-e-strumenti-avanzati-per-la-stabilita-dei-versanti\/"},"modified":"2026-09-20T09:25:59","modified_gmt":"2026-09-20T09:25:59","slug":"niscemi-landslide-hydrogeological-risk-slope-stability","status":"publish","type":"post","link":"https:\/\/blog.geostru.eu\/en\/niscemi-landslide-hydrogeological-risk-slope-stability\/","title":{"rendered":"The Niscemi landslide: hydrogeological risk analysis and advanced tools for slope stability"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text css=”.vc_custom_1770050812622{background-color: #a3a3a3 !important;}”]<\/p>\n

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Case study \u2022 Hydrogeological instability<\/div>\n

The Niscemi landslide: from mapped risk to 3D modelling and stability analyses<\/h1>\n

An integrated approach: GeoRisk for hazard, GeoStru Maps for the three-dimensional reconstruction, Slope (LEM+DEM) for 2D\/3D stability and Debris Flow for rapid phenomena.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=”.vc_custom_170000000010{padding-top:40px !important;padding-bottom:10px !important;}”][vc_column width=”2\/3″][vc_column_text css=””]<\/p>\n

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Why this event matters<\/h2>\n

The Niscemi landslide shows how much risk management requires tools able to move from hazard mapping<\/strong> to 3D modelling<\/strong> and to geotechnical analyses<\/strong> (slope stability and possible rapid evolutions).<\/p>\n

\ud83d\udccd Hazard<\/span><\/div>\n
\ud83e\udded 3D modelling<\/span><\/div>\n
\ud83e\uddf1 2D\/3D stability<\/span><\/div>\n
\ud83c\udf0a Debris flow<\/span><\/div>\n<\/div>\n

[\/vc_column_text][\/vc_column][vc_column width=”1\/3″][vc_column_text]<\/p>\n

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In brief<\/div>\n
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\ud83d\uddfa\ufe0f<\/div>\n
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GeoRisk<\/strong><\/p>\n

maps hazard and risk<\/div>\n<\/div>\n<\/div>\n
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\ud83e\udde9<\/div>\n
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GeoStru Maps<\/strong><\/p>\n

3D model and mesh<\/div>\n<\/div>\n<\/div>\n
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\u26f0\ufe0f<\/div>\n
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Slope<\/strong><\/p>\n

LEM + DEM (large displacements)<\/div>\n<\/div>\n<\/div>\n
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\ud83c\udf27\ufe0f<\/div>\n
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Debris Flow<\/strong><\/p>\n

analysis of rapid phenomena<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row css=”.vc_custom_170000000020{padding-top:20px !important;padding-bottom:20px !important;}”][vc_column width=”1\/2″][vc_single_image image=”14600″ img_size=”large” alignment=”center” css=””][\/vc_column][vc_column width=”1\/2″][vc_column_text css=””]<\/p>\n

1) Mapping hazard and risk with GeoRisk<\/h2>\n

Mapping is the first step: it frames the event in its territorial context and correlates landslide hazard<\/strong>, hydrogeological risk<\/strong> and seismic hazard<\/strong>.<\/p>\n

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    \n
  • quick reading of the PAI (hydrogeological plan) areas<\/li>\n
  • overlay with urbanised areas<\/li>\n
  • support for priorities and planning<\/li>\n<\/ul>\n<\/div>\n
    [vc_btn title=”Open GeoRisk” style=”custom” custom_background=”#0ea5e9″ custom_text=”#061018″ shape=”round” size=”md” link=”url:https%3A%2F%2Fgeoapp.geostru.eu%2Fapp%2Fgeorisk%2F|title:GeoRisk|target:_blank”]<\/div>\n

    [\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n

    [\/vc_column_text][\/vc_column][\/vc_row][vc_row css=”.vc_custom_170000000030{padding-top:20px !important;padding-bottom:20px !important;}”][vc_column width=”1\/2″][vc_column_text css=””]<\/p>\n

    2) From the territory to 3D with GeoStru Maps<\/h2>\n

    Once the critical area is defined, the three-dimensional reconstruction correctly describes scarps, detachment niches and unstable volumes. The triangular 3D mesh becomes a solid basis for the analyses. Triangular 3D mesh (TIN)<\/strong><\/p>\n

    \n
    \n
    mesh created with GeoStru Maps<\/div>\n<\/div>\n<\/div>\n
    [vc_btn title=”Open GeoStru Maps” style=”custom” custom_background=”#22c55e” custom_text=”#07110a” shape=”round” size=”md” link=”url:https%3A%2F%2Fmaps.geoapp.eu|title:GeoStru%20Maps|target:_blank”]<\/div>\n

    [\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_single_image image=”14596″ img_size=”large” alignment=”center” css=””][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n

    [\/vc_column_text][\/vc_column][\/vc_row][vc_row css=”.vc_custom_170000000040{padding-top:20px !important;padding-bottom:20px !important;}”][vc_column width=”1\/2″][vc_single_image image=”14629″ img_size=”large” alignment=”center” css=””][\/vc_column][vc_column width=”1\/2″][vc_column_text css=””]<\/p>\n

    3) Stability and large displacements with Slope (LEM + DEM)<\/h2>\n

    For complex cases, in addition to limit equilibrium (LEM)<\/strong> checks, it can be useful to study the evolution of the phenomenon with a discrete element (DEM)<\/strong> approach, particularly suited to large displacements<\/strong> and fast kinematics.<\/p>\n

    \n

    Why LEM + DEM is useful in cases like Niscemi<\/strong><\/p>\n

      \n
    • global analysis of the safety factor<\/li>\n
    • simulation of kinematic evolutions and displacements<\/li>\n
    • support for emergency and post-collapse scenarios<\/li>\n<\/ul>\n<\/div>\n
      [vc_btn title=”Go to Slope” style=”custom” custom_background=”#ffffff” custom_text=”#111827″ shape=”round” size=”md” link=”url:https%3A%2F%2Fwww.geostru.eu%2Fen%2Fshop%2Fsoftware-en%2Fgeotechnical-software%2Fslope-slope-stability-analysis%2F|title:Slope|target:_blank”]<\/div>\n

      [\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n

      [\/vc_column_text][\/vc_column][\/vc_row][vc_row css=”.vc_custom_170000000050{padding-top:10px !important;padding-bottom:10px !important;}”][vc_column width=”1\/2″][vc_column_text css=””]<\/p>\n

      4) When the landslide evolves into a debris flow<\/h2>\n

      With loose materials and water supply, the mechanism can evolve into a debris flow<\/strong>. In these cases it is important to estimate the possible propagation, the volumes and the areas potentially involved.<\/p>\n

      \n
      \n

      Propagation<\/strong><\/p>\n

      tracking of paths and run-out areas<\/div>\n<\/div>\n
      \n

      Parametric estimates<\/strong><\/p>\n

      volumes and intensity scenarios<\/div>\n<\/div>\n<\/div>\n
      [vc_btn title=”Open Debris Flow” style=”custom” custom_background=”#8b5cf6″ custom_text=”#0b0720″ shape=”round” size=”md” link=”url:https%3A%2F%2Fgeoapp.geostru.eu%2Fapp%2Fdebris-flow%2F|title:Debris%20Flow|target:_blank”]<\/div>\n

      [\/vc_column_text][\/vc_column][vc_column width=”1\/2″][vc_single_image image=”14612″ img_size=”large” alignment=”center” css=””][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n

      [\/vc_column_text][\/vc_column][\/vc_row][vc_row full_width=”stretch_row” css=”.vc_custom_170000000060{padding-top:28px !important;padding-bottom:28px !important;background-color:#0b1220 !important;}”][vc_column][vc_column_text css=””]<\/p>\n

      \n

      From analysis to solution: possible interventions<\/h2>\n

      Mitigation starts from one principle: reduce the triggering cause<\/strong>. Water control (regulation and drainage) is often decisive, together with temporary measures to contain displacements and a reprofiling with permanent works.<\/p>\n

      \n
      \n
      1) Water regulation<\/div>\n
      Channels, deep drains and\/or drainage wells downstream of the built-up area to reduce pore pressures.<\/div>\n<\/div>\n
      \n
      2) Rapid containment<\/div>\n
      Bolts and \u201cfast\u201d anchors to limit immediate displacements and increase safety in the emergency phase.<\/div>\n<\/div>\n
      \n
      3) Reprofiling and permanent works<\/div>\n
      Reprofiling of the unstable area and structural works to restore the equilibrium of the slope.<\/div>\n<\/div>\n<\/div>\n
      [vc_btn title=”GeoRisk” style=”custom” custom_background=”#0ea5e9″ custom_text=”#061018″ shape=”round” size=”md” link=”url:https%3A%2F%2Fgeoapp.geostru.eu%2Fapp%2Fgeorisk%2F|title:GeoRisk|target:_blank”]
      \n[vc_btn title=”GeoStru Maps” style=”custom” custom_background=”#22c55e” custom_text=”#07110a” shape=”round” size=”md” link=”url:https%3A%2F%2Fmaps.geoapp.eu|title:GeoStru%20Maps|target:_blank”]
      \n[vc_btn title=”Slope” style=”custom” custom_background=”#ffffff” custom_text=”#111827″ shape=”round” size=”md” link=”url:https%3A%2F%2Fwww.geostru.eu%2Fen%2Fshop%2Fsoftware-en%2Fgeotechnical-software%2Fslope-slope-stability-analysis%2F|title:Slope|target:_blank”]
      \n[vc_btn title=”Debris Flow” style=”custom” custom_background=”#8b5cf6″ custom_text=”#0b0720″ shape=”round” size=”md” link=”url:https%3A%2F%2Fgeoapp.geostru.eu%2Fapp%2Fdebris-flow%2F|title:Debris%20Flow|target:_blank”]<\/div>\n<\/div>\n

      [\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

      [vc_row][vc_column][vc_column_text css=”.vc_custom_1770050812622{background-color: #a3a3a3 !important;}”] Case study \u2022 Hydrogeological instability The Niscemi landslide: from mapped risk to 3D modelling and stability analyses An integrated approach: GeoRisk for hazard, GeoStru Maps for the three-dimensional reconstruction, Slope (LEM+DEM) for 2D\/3D stability and Debris Flow for rapid phenomena. [\/vc_column_text][\/vc_column][\/vc_row][vc_row css=”.vc_custom_170000000010{padding-top:40px !important;padding-bottom:10px !important;}”][vc_column width=”2\/3″][vc_column_text css=””] Why this event matters The…<\/p>\n","protected":false},"author":21284,"featured_media":14596,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1649,144,1901],"tags":[1879,2552,1608],"class_list":["post-14634","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ingegneria-2-en","category-geology","category-geotechnics","tag-geoapp","tag-niscemi","tag-slope","category-1649","category-144","category-1901","description-off"],"yoast_head":"\nThe Niscemi landslide: risk analysis and slope stability tools<\/title>\n<meta name=\"description\" content=\"Technical analysis of the Niscemi landslide: hydrogeological risk mapping with GeoRisk, 3D modelling with GeoStru Maps, slope 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