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Table 1 Liquefaction Susceptibility of Sedimentary deposits present in Greater Chennai based on Geological and Geomorphological criteria (Youd and Perkins 1978)

From: GIS based urban social vulnerability assessment for liquefaction susceptible areas: a case study for greater Chennai, India

Type of deposit

General distribution of cohesionless sediments in deposits

Likelihood that cohesionless sediments, when saturated, would be susceptible to liquefy

(by age of deposit)

 < 500 years

Holocene

Pleistocene

Pre-Pleistocene

River channel

Locally Variable

Very high

High

Low

Very low

Flood plain

Widespread

High

Moderate

Low

Very low

Alluvial plain

Widespread

Moderate

Low

Very low

Very low

Coastal delta

Widespread

Very high

High

Low

Very low

Estuarine

Locally Variable

High

Moderate

Low

Very low

Artificial compacted fill

Variable

Low