| Period | Accretion (m) | Erosion (m) | Net change (m) |
| 1986-2006 | 1472.42 | −32905. 2 | −31432.78 |
| 2006-2008 | 4074.28 | −3714.1 | 360.18 |
| 1986-2008 | 2618.38 | −33691.2 | −31072.82 |