Variations in Tidal Constituents along the Nearshore Waters of Karnataka, West Coast of India

Kumar, V. Sanil; Dora, G. Udhaba; Philip, Sajive; Pednekar, P.; Singh, Jai

doi:10.2112/jcoastres-d-09-00114.1

Cited by 19 publications

(11 citation statements)

References 7 publications

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“…Coastal areas near the river mouths along the study area suffer permanent erosion due to natural shifting and migration of the river mouths [30]. The tides are of mixed semidiurnal type and its range increases towards the north of the state [31]. Significant wave height, during the monsoon, has been assessed to be greater than 3 m [6] and is normally less than 1.5 m during the rest of Advances in Civil Engineering 3 the year.…”

Section: Study Areamentioning

confidence: 99%

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GIS Based Approach for Vulnerability Assessment of the Karnataka Coast, India

Jana

Hegde

2016

Advances in Civil Engineering

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The coastal zones are highly resourceful and dynamic. In recent times, increased events of tropical cyclones and the devastating impact of the December 2004 tsunami have brought forth the importance of assessing the vulnerability of the coast to hazard-induced flooding and inundation in coastal areas. This study intends to develop coastal vulnerability index (CVI) for the administrative units, known astalukasof the Karnataka state. Seven physical and geologic risk variables characterizing the vulnerability of the coast, including rate of relative sea level change, historical shoreline change, coastal slope, coastal regional elevation, mean tidal range, and significant wave height derived using conventional and remotely sensed data, along with one socioeconomic parameter “population,” were used in the study. A total of 298 km of shoreline are ranked in the study. It was observed that about 68.65 km of the shoreline is under very high vulnerable category and 79.26 km of shoreline is under high vulnerable category. Of the remaining shoreline, 59.14 km and 91.04 km are of moderate and low vulnerable categories, respectively.

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Section: Study Areamentioning

confidence: 99%

“…For the current study, coastal areas with high tidal range are considered as highly vulnerable and low tidal range as less vulnerable. Previously, studies were carried out at various locations of the study area and the tidal range has been determined [28,31,37]. Table 2 lists the details of the studies and the tidal range.…”

Section: Tidal Rangementioning

confidence: 99%

GIS Based Approach for Vulnerability Assessment of the Karnataka Coast, India

Jana

Hegde

2016

Advances in Civil Engineering

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“…The tides in the study area are mixed semidiurnal, the range of which raises towards the north of the state (Kumar et al, 2011a). During the monsoon along the west coast of India, significant wave height up to 6 m has been reported (Kumar et al, 2006), and is normally less than 1.5 m during rest of the period.…”

Section: Study Areamentioning

confidence: 86%

Shoreline Transformation Study of Karnataka Coast: Geospatial Approach

Hegde

Akshaya

2015

Aquatic Procedia

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Coastal erosion is a natural phenomenon affecting a large number of coastal areas. The coastal zone is an area with immense geological, geomorphological and ecological interest. Monitoring and mitigation of shoreline erosion along populated coastal areas is an important task and remains a difficult goal to achieve. The coast of Karnataka state extends from Talapadi in south to Sadashivgad in north covering a distance of about 280 km. In this study, an attempt has been made to investigate the shoreline transformation along the Karnataka coast. Fair weather satellite images of LANDSAT from 1991 to 2014 with an interval of eight years were used to delineate the shoreline. A Linear Regression Rate-of-change (LRR) and an End Point Rate (EPR) statistic was carried out using Digital Shoreline Analysis System (DSAS) computer software of United States Geological Survey (USGS). Highest EPR of about 15.96 m (1991-2014) was noticed in the Ankola taluk, whereas highest LRR was about 15.5 m in Karwar, both indicating accretion. Highest erosion was noticed in Honnavar with an LRR of 19.59 m respectively and EPR of 19.95 m.

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“…Areas near the river mouths along the study area suffer permanent erosion due to natural shifting and migration of the river mouths [28]. The tides are of mixed semidiurnal type and its range increases towards the north of the state [25]. Significant wave height, during the monsoon has been assessed to be greater than 3 m [26] and is normally less than 1.5 m during the rest of the year.…”

Section: Study Areamentioning

confidence: 99%