Where the shore is moving: erosion in the fishing villages

Sample articleIllustrative text, not published research

Along Kanyakumari's western coast, from Colachel towards the Kerala border, fishing villages sit on a narrow strip of sand between the sea and the road. In many of them the beach has narrowed within living memory. In some, the waves now reach houses during the monsoon swell.

One wall moves the problem

Seawalls and groynes are the most common defences. A groyne traps sand on one side, and the beach beyond it, starved of that sand, often erodes faster. A seawall can hold a line but tends to lose the beach in front of it. Each village's defence changes the shore of the next one along.

“Every sea defence is also a decision about which beach is allowed to shrink.”

Village by village

For each village between Colachel and the border we compare satellite images and shoreline surveys over time, and set them beside the record of when and where each structure was built. Fishers' own accounts of where boats can still land fill the gaps the images leave.

The result is a map of change that does not stop at administrative lines, because the sand does not either.