Denudation:
1. Schwerkraftbedingte Massenbewegungen von Fels u. Schutt
2. Massenbewegungen des Regoliths unter Mitwirkung von Wasser, Eis, Schnee
3. Regolithbewegung mit Frostwirkung
4. Abtragung u. Transport durch Gletscher
5. Abfuhr von gelösten Stoffen
6. Abtragung u. Transport durch Wind
7. Abtragung u. Materialtransport durch auftreffende Regentropfen(Splash) u. durch
unkonzentrierten, flächenhaften Abfluss von Niederschlagswasse
Schwellenwert: Grenzschubspannung, Grenzscherspannung s
innere Reibung: Funktion der Kornform u. Lagerungsart der Körner -> eckige Körnern
haben bessere Verkantung
natürlicher Böschungswinkel: Scherspannung = innerer Reibungswiderstand φ
s = σ · tan φ + c
s = Grenzscherspannung
Im Festgesteine & nichtbindigen Böden
σ = Druckpannung
-> Reibung + Kohäsion
tan φ = konstanter Reibungswinkel
je steiler als der Hang,
c = Kohäsion
-> desto geringer ist die Druckspannung σ
-> desto geringer ist die für die Bewegung
erforderliche Grenzscherspannung s
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