Table 1 Classification scheme for inlet Type and stability conditions (Reproduced from Duong et al.13, all rights reserved).

From: Probabilistic projections of the stability of small tidal inlets at century time scale using a reduced complexity approach

Inlet Type

r = P/M

Bruun classification

Type 1

 > 150

Good

100–150

Fair

50–100

Fair to Poor

20–50

Poor

Type 2

10–20

Unstable (open and migrating)

Type 2/3

5–10

Unstable (migrating or intermittently closing)

Type 3

0–5

Unstable (intermittently closing)