is blocked since the 1950s by large penstock pipes of the Periyar hydro-electric project. These developmental activities have also rendered unviable the elephant habitats of Mathikettan Shola and the northern part of Theni Forest Division.
is blocked sincethe 1950s by large penstock pipes of the Periyar hydro-electricproject. These developmental activities have also rendered unviable the elephanthabitats of Mathikettan Shola and the northern part of TheniForest Division.