R. T. Arun Vignesh

Bio: R. T. Arun Vignesh is an academic researcher from National Institute of Technology, Karnataka. The author has contributed to research in topics: Vegetation & Wave flume. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

Experimental Study on Role of Emergent Artificial Coastal Vegetation in Controlling Wave Run Up

Abstract: Coastal vegetation can protect people and property from erosion and flooding, potentially providing a solution for conservation and development. Recently, there has been a substantial interest in the ability of natural vegetation to protect people and infrastructure from storm, wind, and wave damage. These ecosystem services provide new and powerful reasons for conservation of coastal habitats and may represent solutions that balance conservation and development. Since the costs of installing hard structures for coastal protection are very high; strong negative public reaction to rock emplacements along the coast often aggravate the problem; research in the field of soft measures of coastal protection is important which highlights the need and importance of a sustainable, environment friendly, and cost efficient solution such as coastal or beach vegetation. This paper tries to bring out the effect of artificial emergent vegetation of meadow widths 1 and 2 m on wave run up through an experimental study. The tests were carried out with emergent vegetation placed on the bed of a 50 m long wave flume. For wave heights ranging from 0.08 to 0.16 m at an interval of 0.02 m and wave periods ranging from 1.4 to 2 s in water depths of 0.40 and 0.45 m, measurements of wave run up over the beach slope were observed.

Closure of "Effects of Southern California Kelp Beds on Waves"

Abstract: The effect of a Macrocystis kelp forest on shoreward propagating surface gravity waves was measured. Observations were made over a 67-day period at four locations around a 350-m-wide kelp bed off Carlsbad, California. Instruments were located directly offshore and onshore of the kelp bed at depths of 13 m and 8 m, respectively, and at control stations at the same depths, but displaced 750 m alongshore, away from the kelp bed. The bathymetry between the offshore and onshore sites was gently sloping and featureless. The measured spectra, significant wave height, mean wave direction at peak frequency, and total radiation stress differed only slightly between the offshore kelp and control stations and were similar at the onshore sites. The similarity of the wave field at the onshore kelp and control sites shows that this typical southern California kelp bed, with an average density of about 10 plants per 100 m 2 , does not have a significant effect on waves. These measurements can be used to place upper bound...