Fairbridge (1980) presented a classification system composed of the following seven basic physiographic types: coastal plain (drowned river valley), bar ... near the mouth of the estuary.

TNIE, on Sunday, visited the Kovalam estuary where Muttukadu backwaters drains into the sea. The wide bar mouth of the estuary was found pushing large volume of raw sewage into the sea ...

On Tuesday, the fisherfolk community at the Muthalapozhi harbour appeared restive over the alleged slow progress in dredging the submerged sand bar, which has rendered the sea at the estuary’s inlet ...