Sunday 05 May 2024


Threshold typeThreshold codeDescription
EMAPEMAPNormalized cumulative event rainfall (EMAP)



Thresholds sorted by Continent

ContinentNationZoneThreshold typeLandslide codeEquationRangeNotesReferenceImage
AfricaSouth AfricaNatal Group, Durban Area, KwaZulu-NatalEMAPAEMAP < 0.12n.a.Landslides do not occurBell FG, Maud RR (2000) Landslides associated with the colluvial soils overlying the Natal Group in the greater Durban region of Natal, South Africa. Environ Geol 39(9): 1029–1038Graphic
AfricaSouth AfricaNatal Group, Durban Area, KwaZulu-NatalEMAPAEMAP > 0.20n.a.Severe events (> 10 landslides)Bell FG, Maud RR (2000) Landslides associated with the colluvial soils overlying the Natal Group in the greater Durban region of Natal, South Africa. Environ Geol 39(9): 1029–1038Graphic
AfricaSouth AfricaNatal Group, Durban Area, KwaZulu-NatalEMAPA0.16 < EMAP < 0.20n.a.Moderate events (3 to 6 landslides)Bell FG, Maud RR (2000) Landslides associated with the colluvial soils overlying the Natal Group in the greater Durban region of Natal, South Africa. Environ Geol 39(9): 1029–1038Graphic
AfricaSouth AfricaNatal Group, Durban Area, KwaZulu-NatalEMAPA0.12 < EMAP < 0.16n.a.Minor events (1 or 2 landslides)Bell FG, Maud RR (2000) Landslides associated with the colluvial soils overlying the Natal Group in the greater Durban region of Natal, South Africa. Environ Geol 39(9): 1029–1038Graphic
Asian.a.n.a.EMAPA0.05 < EMAP < 0.10n.a.Intermediate probability of landslidesBhandari RK, Senanayake KS, Thayalan N (1991) Pitfalls in the prediction on landslide through rainfall data. In: Landslides (Bell DH, ed). Rotterdam: A.A. Balkema, 2: 887–890Graphic
Asian.a.n.a.EMAPAEMAP < 0.05n.a.Low probability of landslidesBhandari RK, Senanayake KS, Thayalan N (1991) Pitfalls in the prediction on landslide through rainfall data. In: Landslides (Bell DH, ed). Rotterdam: A.A. Balkema, 2: 887–890Graphic
Asian.a.n.a.EMAPA0.10 < EMAP < 0.20n.a.High probability of landslidesBhandari RK, Senanayake KS, Thayalan N (1991) Pitfalls in the prediction on landslide through rainfall data. In: Landslides (Bell DH, ed). Rotterdam: A.A. Balkema, 2: 887–890Graphic
Asian.a.n.a.EMAPAEMAP > 0.20n.a.Landslides will always occurBhandari RK, Senanayake KS, Thayalan N (1991) Pitfalls in the prediction on landslide through rainfall data. In: Landslides (Bell DH, ed). Rotterdam: A.A. Balkema, 2: 887–890Graphic
EuropeItalyPiedmontEMAPA0.22 < EMAP < 0.31n.a.up to 30 landslides per km2Govi M, Sorzana PF (1980) Landslide susceptibility as function of critical rainfall amount in Piedmont basin (North-Western Italy). Studia Geomorphologica Carpatho-Balcanica 14: 43-60Graphic
EuropeItalyPiedmontEMAPA0.28 < EMAP < 0.38n.a.up to 60 landslides per km2Govi M, Sorzana PF (1980) Landslide susceptibility as function of critical rainfall amount in Piedmont basin (North-Western Italy). Studia Geomorphologica Carpatho-Balcanica 14: 43-60Graphic
EuropeItalyPiedmontEMAPA0.10 < EMAP < 0.25n.a.3 to 15 landslides per km2Govi M, Sorzana PF (1980) Landslide susceptibility as function of critical rainfall amount in Piedmont basin (North-Western Italy). Studia Geomorphologica Carpatho-Balcanica 14: 43-60Graphic
South AmericaBraziln.a.EMAPAEMAP > 0.12n.a.Independently of antecedent rainfallGuidicini G, Iwasa OY (1977) Tentative correlation between rainfall and landslides in a humid tropical environment. Bulletin of the International Association of Engineering Geology 16: 13-20Graphic
South AmericaBraziln.a.EMAPA0.08 < EMAP < 0.12n.a.Depending on antecedent rainfallGuidicini G, Iwasa OY (1977) Tentative correlation between rainfall and landslides in a humid tropical environment. Bulletin of the International Association of Engineering Geology 16: 13-20Graphic
South AmericaBraziln.a.EMAPAEMAP < 0.08n.a.Not likely to trigger landslidesGuidicini G, Iwasa OY (1977) Tentative correlation between rainfall and landslides in a humid tropical environment. Bulletin of the International Association of Engineering Geology 16: 13-20Graphic




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