Impact of Groins on Beach Morphology: A Case Study near Gopalpur Port, East Coast of India

Mohanty, Pratap Kumar; Patra, Sisir Kumar; Bramha, Satyanarayan; Seth, B.; Pradhan, Umakanta; Behera, Basanta Kumara; Mishra, Pravakar; Panda, Uma Sankar

doi:10.2112/jcoastres-d-10-00045.1

Cited by 56 publications

(15 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The severe erosion in the northern sector in the 1980s and 1990s (see Table 4) has been defused to some extent by the accretion due to the breakwater at the Kayamkulam inlet. The construction of 26 groins during the period 2009-2015 to protect individual stretches of the coast also had its impact on the morphology as observed by some researchers (Guimaraes et al 2016;Mohanty et al 2012). The short-term erosion/accretion scenario presented in Figs.…”

Section: Discussionmentioning

confidence: 79%

Erosion and heavy mineral depletion of a placer mining beach along the south-west coast of India: part III—short- and long-term morphological changes

et al. 2016

View full text Add to dashboard Cite

The Chavara coast of south-west India is well known for its rich beach placer deposits which are being commercially mined by two public sector firms. The erosion of the beach and innershelf and the depletion of heavy mineral content of this coast have attracted a lot of attention of late, and an investigation of the mechanisms that drive these changes was taken up recently. The results of the investigation are presented in three parts. This paper, which is the last in the series, presents a study of the morphological changes of the beach and innershelf and integrates the results from the other two papers with an analysis of multi-dated shoreline and bathymetry data. The analysis of the multi-dated data showed an overall retreat of the shoreline and a relative deepening of the innershelf. The shoreline retreat has been quite alarming at the mining sites with one of the mining sites showing a retreat of nearly 400 m. The sediment deposition adjacent to the breakwater (built during 2000-2007) at the northern inlet has defused to some extent the high erosion observed earlier in the northernmost sector, and the presence of well-maintained seawalls has nearly maintained the shoreline south of the mining site. The erosion of the beach is accompanied by a deepening of the innershelf which is more pronounced in the shallower portions up to 10 m depth. The observed changes in the beach-innershelf morphology are analysed with respect to the nearshore sediment transport regime and heavy mineral distribution of the coast. It is observed that the combined intake of sediments by the two firms during the past one and a half decade is much above the sustainable mining level. Another contributing factor is the 2004 tsunami which drained off a sizable quantity of innershelf sediments rich in heavy minerals to the hinterland regions. The breakwaters at the two inlets bordering this coast have virtually compartmentalized this coast from the rest of the south-west coast making it a sediment sub-cell. In addition, the breakwaters act as groins

show abstract

Section: Discussionmentioning

confidence: 79%

Erosion and heavy mineral depletion of a placer mining beach along the south-west coast of India: part III—short- and long-term morphological changes

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The highest H s measured during Cyclone Phailin is less than that measured (8.4 m on 28 October 1999) in the Bay of Bengal in deep water during the passage of the Orissa super cyclone (Rajesh et al, 2005). The earlier reported maximum H s off Gopalpur based on measured data was 2.4 m in 1990 (Chandramohan et al, 1993) and 3.3 m in 2008 (Mohanty et al, 2012). Due to the cyclone-generated high waves, the Waverider buoy drifted from its moored position at 00:00 UTC on 12 October 2013.…”

Section: Wave Parametersmentioning

confidence: 90%

Waves off Gopalpur, northern Bay of Bengal during Cyclone Phailin

et al. 2014

View full text Add to dashboard Cite

Abstract. The wave statistical parameters during Cyclone Phailin which crossed the northern Bay of Bengal are described based on the Directional Waverider buoy-measured wave data from 8 to 13 October 2013. On 12 October 2013, the cyclone passed within 70 km of the Waverider buoy location with a wind speed of 59.2 m s −1 (115 knots), and during this period, a maximum significant wave height of 7.3 m and a maximum wave height of 13.5 m were measured at 50 m water depth. Eight freak wave events are observed during the study period. The ratio of the maximum wave height to significant wave height recorded is found to be higher than the theoretical value and the ratio of the crest height to wave height during the cyclone was 0.6 to 0.7. The characteristics of the wave spectra before and after the cyclone is studied and found that the high-frequency face of the wave spectrum is proportional to f −3 before the cyclone and is between f −4 and f −5 during the cyclone period.

show abstract

“…In addition, the uncontrolled process of nourishment of a beach can generate silting of some plant species (such as Posidonia oceanica) and, therefore, an imbalance in the profile and increase in erosion [29]. To reduce beach erosion, the use of breakwater in the coastal areas to prevent movement of sediments is common, both transversely and longitudinally, which generates a significant environmental impact within and outside the performance area [30,31] (Fig. 2).…”

Section: Factors Affecting Coastal Erosionmentioning

confidence: 99%

Factors influencing the retreat of the coastline

López¹,

Pagán²,

López³

et al. 2017

Int. J. CMEM

View full text Add to dashboard Cite

One of the main problems of coastlines around the world is their erosion. There are many studies that have tried to link coastal erosion with different parameters such as: maritime climate, sediment transport, sea level rise etc. However, it is unclear to what extent these factors influence coastal erosion. For example, the Intergovernmental Panel on Climate Change (IPCC) has predicted an increase in sea level at a much faster rate than that experienced in the first part of this century, reaching 1 m of elevation in some areas. Another factor to consider is the lack of sediment supply, since currently the contribution of new sediments from rivers or ravines is interrupted by anthropic activities carried out in their basins (dams, channelling, etc.). The big storms, increasingly frequent due to climate change, also should be considered, since they produce an offshore sediments transport, so that these cross the depth of closure, causing nonreturn of the sediment to the beach. Also, the sediment undergoes a process of wear due to various reasons such as the dissolution of the carbonate fraction and/or breakage and separation of the components of the particles. All these elements, to a greater or lesser extent, lead to the retreat of the coastline. Therefore, the aim of this study is to analyse the different factors causing the retreat of the coastline, in order to determine the degree of involvement of each of them and, therefore, be able to pose different proposals to reduce the consequences of coastal erosion.

show abstract

Impact of Groins on Beach Morphology: A Case Study near Gopalpur Port, East Coast of India

Cited by 56 publications

References 14 publications

Erosion and heavy mineral depletion of a placer mining beach along the south-west coast of India: part III—short- and long-term morphological changes

Erosion and heavy mineral depletion of a placer mining beach along the south-west coast of India: part III—short- and long-term morphological changes

Waves off Gopalpur, northern Bay of Bengal during Cyclone Phailin

Factors influencing the retreat of the coastline

Contact Info

Product

Resources

About