Partial boundary wall collapse raises concern over structures along RK Beach

The recent partial collapse of the boundary wall and concrete floor edges at the baby park near RK Beach, post-Cyclone Michaung, has sparked safety concerns regarding man-made structures along the coastline. Scientists emphasize that while sand erosion is a natural process, man-made constructions exacerbate the issue, disturbing the delicate balance.
Chief Scientist V.V.S.S. Sarma of the National Institute of Oceanography (NIO), Vizag, explains that sand erosion is a temporary phenomenon, with sand deposition occurring in opposite directions during winter and summer, maintaining an overall balance. However, man-made structures, particularly close to the shoreline, disrupt this equilibrium, leading to erosion. During cyclones, extreme currents intensify erosion.
Sarma suggests observing the affected area for a few weeks before implementing remedial measures such as beach nourishment. A previous study by CSIR-NIO, Visakhapatnam, between 2011 and 2015, highlighted changes in the waterfront, aiding in understanding sand accretion and erosion patterns.
Retired Chief Scientist G.P.S. Murty notes that beach erosion is common during surges or cyclonic weather. He recommends beach nourishment, planting coconut and casuarina trees, and beach weeds to counter sand erosion. A successful example is the beach nourishment conducted ahead of the International Fleet Review (IFR) in 2016.
A study conducted by Kollu Sai Satya Mounika of the Department of Geology, Andhra University, suggests constructing groynes at suitable intervals to trap incoming sand and nourish the beach. The pumping of dredged sand towards affected areas can also contribute to stabilizing the beach and preventing further erosion.