Vijayawada: Increasing Krishna delta front turns a threat to seashore from natural calamities, cyclones and tsunamis, especially in Machilipatnam area.
The increasing Krishna delta front has been damaging the ecosystem and natural barriers like mangroves, causirina and other plants which protect the seashore from natural calamities.
According to National Institute of Hydrology and ground water department joint studies, the sediments of Krishna river have increased the Krishna delta area during the last 6,000 years. The Geological Survey of India (GIS) has also recognised the various studies and identified similar changes of sea coasts are part of global phenomena.
Under the research and development project, the National Institute of Hydrology and ground water department have jointly studied on Krishna delta evolution in 1976, 1996 and the study on Krishna delta has been expanded in 40 square kilometers in the limits of Machilipatnam, Kaikaluru, Challapalli, Avanigadda, Kruttivennu, Mudenepalli, Kalidindi, Pedana, Guduru, Gudlavalleru and Pamarru mandals in Krishna district.
The studies found that the entire area in the particular mandals was sea in past. But the Krishna river had deposited sediments in the region and naturally developed the Krishna delta. The new area has been developed in the last 6,000 years, said ground water department deputy director A. Varaprasad. The process is natural in part of marine transmission and regression, he added.
However, several studies, which were also recognized by the Geological Survey of India, cautioned that the increasing delta front is damaging the ecosystem and mangrove swamps.