Sreevalsa Kolathayar | National Institute of Technology Karnataka,Surathkal (original) (raw)

Papers by Sreevalsa Kolathayar

Research paper thumbnail of An Investigative Study of Seismic Landslide Hazards

Proceedings of the conference on Recent Advances in Rock Engineering (RARE 2016), 2016

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Research paper thumbnail of A Revisit to Seismic Hazard at Uttarakhand

International Journal of Geotechnical Earthquake Engineering, 2015

This paper presents the seismic hazard of the state of Uttarakhand in India, located at the footh... more This paper presents the seismic hazard of the state of Uttarakhand in India, located at the foothills of the seismically active Himalayan mountain ranges. In the present study, an updated catalog of earthquakes has been prepared for Uttarakhand which was homogenized into a unified moment magnitude scale after declustering of the catalog to remove aftershocks and foreshocks. Various source zones were identified in the study area to account for local variability in seismicity characteristics. The seismicity parameters were estimated for each of these source zones, which are necessary inputs into seismic hazard estimation of a region. The seismic hazard evaluation of the region based on a state-of-the art PSHA study was performed using the classical Cornell–McGuire approach with different source models and attenuation relations. The most recent knowledge of seismic activity in the region was used to evaluate the hazard, incorporating uncertainty associated with different modeling param...

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Research paper thumbnail of Deterministic seismic hazard analysis for Phuentsholing region of southern Bhutan considering local site effects

Innovative Infrastructure Solutions

Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development ... more Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development of infrastructure over time, the safety of the residence and lifeline buildings becomes a matter of concern. Bhutan lies in the Himalayan mountain ranges, which is considered one of the most active regions for seismic events. The Indian seismic code, IS 1893-2016, has assigned Zone IV for the region, which signifies the large risk that exists for all the structures. Therefore, conducting a seismic hazard assessment for the site becomes extremely necessary before any major construction. The present study focuses to perform the deterministic seismic hazard analysis (DSHA) around certain points of interest in the town of Phuentsholing, in Bhutan. Furthermore, site-specific response spectra for Pipaldhara-1, Pipaldhara-2, Kabreytar-1, Kabreytar-2 and Phuentsholing town were plotted from the results of the DSHA. It is estimated that a peak ground acceleration ranging from 0.11 to 0.14 g can be anticipated at the level of bedrock in the study region. Response spectra were plotted for the ground level using appropriate soil-amplification coefficients, derived from the analyses in the DEEPSOIL program.

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Research paper thumbnail of Deterministic Seismic Hazard Analysis of Grand Ethiopia Renaissance Dam (GERD)

Geotechnical, geological and earthquake engineering, 2022

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Research paper thumbnail of Deterministic seismic hazard analysis for Phuentsholing region of southern Bhutan considering local site effects

Innovative Infrastructure Solutions

Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development ... more Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development of infrastructure over time, the safety of the residence and lifeline buildings becomes a matter of concern. Bhutan lies in the Himalayan mountain ranges, which is considered one of the most active regions for seismic events. The Indian seismic code, IS 1893-2016, has assigned Zone IV for the region, which signifies the large risk that exists for all the structures. Therefore, conducting a seismic hazard assessment for the site becomes extremely necessary before any major construction. The present study focuses to perform the deterministic seismic hazard analysis (DSHA) around certain points of interest in the town of Phuentsholing, in Bhutan. Furthermore, site-specific response spectra for Pipaldhara-1, Pipaldhara-2, Kabreytar-1, Kabreytar-2 and Phuentsholing town were plotted from the results of the DSHA. It is estimated that a peak ground acceleration ranging from 0.11 to 0.14 g can be anticipated at the level of bedrock in the study region. Response spectra were plotted for the ground level using appropriate soil-amplification coefficients, derived from the analyses in the DEEPSOIL program.

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Research paper thumbnail of Liquefaction

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Research paper thumbnail of Kerala

Geotechnical Characteristics of Soils and Rocks of India, 2021

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Research paper thumbnail of Site Characterization Using Satellite Data and Estimation of Seismic Hazard at Ground Surface

Lecture Notes in Civil Engineering, 2021

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Research paper thumbnail of Embodied Energy and Carbon Emissions of Pavements: A Review

Energy consumption takes place at each stage of pavement construction, right from extraction of r... more Energy consumption takes place at each stage of pavement construction, right from extraction of raw materials to finished products like roads. Carbon emission is an undesirable product that materializes simultaneously with energy consumption that is indispensable right through the construction activities. Reusability is another important feature that we should consider when we speak about sustainability. Though pavements made of bitumen have a higher embodied energy, it readily yields to recycling, when compared to concrete pavements, thereby reducing the energy consumed. Reducing consumed energy helps to save the resource for the future. Many situations warrant compromised sustainability when a particular type of pavement is preferred to serve a special function. In such cases, alternative materials with low embodied energy and low carbon emission may be used for the pavement design. Designs using waste materials and recycled materials would help to make energy-efficient pavements ...

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Research paper thumbnail of Resilient Infrastructures and Disaster Risk Reduction—An Introduction

Resilient Infrastructure, 2021

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Research paper thumbnail of Strategic Analysis on the Potential of Coastal Reservoirs in Reshaping Indian Coastal Economic Corridor

International Journal of Ocean and Coastal Engineering, 2019

In general, people like to live near the coast because of a better aesthetical pleasing living en... more In general, people like to live near the coast because of a better aesthetical pleasing living environment, access to a variety of recreational activities and more job opportunities. Consequently, more than 50% of the world’s population live within 200[Formula: see text]km of the coast, and ¾ of the world’s megacities are situated by the shore. Significant pressure on land, water supply, waste management and other infrastructures appear in these coastal cities. India, which hosts one-sixth of the world’s population is looking for strategies to manage India’s coastal cities, water, land and human resources. This paper reviews China’s experience in water resources development for coastal cities. China’s coastal economic corridor (CEC) contributes 60% of the national GDP, which needs plentiful water supply to sustain its coastal cities. The present investigation shows that India has better natural conditions to develop its CEC. Among the coastal infrastructures, coastal reservoirs (i.e...

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Research paper thumbnail of Seismic Bearing Capacity Factor Considering Composite Failure Mechanism

International Journal of Geotechnical Earthquake Engineering, 2018

This article describes how the design of shallow foundation needs complete knowledge about bearin... more This article describes how the design of shallow foundation needs complete knowledge about bearing capacity. During earthquakes additional lateral force acts at the foundation bed which reduces the bearing capacity. Most of the literature present either the pseudo static analysis or assume a planar failure surface to estimate seismic bearing capacity factors. Here, a pseudo dynamic approach that considers the time dependent effect of earthquake loading is employed. A composite failure surface has been considered for a more realistic estimation of seismic bearing capacity. New expressions were formulated to arrive at the seismic bearing capacity factor, considering the forces acting on the failure wedge based on the limit equilibrium approach. The effect of soil friction angles and the seismic peak of horizontal ground accelerations on the seismic bearing capacity were studied using the proposed method. It was observed that present pseudo-dynamic analysis with a composite failure mec...

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Research paper thumbnail of Seismic Site Characterization

Comprehensive Seismic Zonation Schemes for Regions at Different Scales, 2018

This chapter describes different methodologies available for site characterization. The details o... more This chapter describes different methodologies available for site characterization. The details of different low strain and high strain tests are also listed in this chapter. It also provides procedures for the evaluation of dynamic properties from the laboratory as well as in-situ tests. Further, this chapter also presents site characterization studies carried out at micro as well as macro-level.

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Research paper thumbnail of Joint Time Frequency Analysis Based Synthesis of Acceleration-Time History and Response Spectra for Japanese Earthquakes

Lecture Notes in Civil Engineering, 2021

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Research paper thumbnail of Seismic Risk Assessment for Coimbatore Integrating Seismic Hazard and Land Use

Indian cities are expanding not only in terms of built environment but also in population. Multi-... more Indian cities are expanding not only in terms of built environment but also in population. Multi-story buildings are rising rapidly to accommodate the growing population, undesirably even in hazard prone areas. Such a scenario calls for a proper disaster risk reduction program and plan to control the inevitable damage to lives and properties. Earthquakes are destructive only if the factors that increase the damages prevail. Attention should be given to crowded cities with people and infrastructure vulnerable to hazard. This study presents the details of deterministic seismic hazard analysis (DSHA) done for Coimbatore city of the state of Tamil Nadu, India using the latest available information on seismicity of the region. The earthquake data was compiled from different agencies and homogenized in a unified moment magnitude scale to create an updated earthquake catalog. Seismotectonic map for the study area was prepared by superimposing the earthquake events on the seismogenic source...

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Research paper thumbnail of Seismic Risk Assessment for Coimbatore Integrating Seismic Hazard and Land Use

Proceedings of GeoShanghai 2018 International Conference: Geoenvironment and Geohazard, 2018

Indian cities are expanding not only in terms of built environment but also in population. Multi-... more Indian cities are expanding not only in terms of built environment but also in population. Multi-story buildings are rising rapidly to accommodate the growing population, undesirably even in hazard prone areas. Such a scenario calls for a proper disaster risk reduction program and plan to control the inevitable damage to lives and properties. Earthquakes are destructive only if the factors that increase the damages prevail. Attention should be given to crowded cities with people and infrastructure vulnerable to hazard. This study presents the details of deterministic seismic hazard analysis (DSHA) done for Coimbatore city of the state of Tamil Nadu, India using the latest available information on seismicity of the region. The earthquake data was compiled from different agencies and homogenized in a unified moment magnitude scale to create an updated earthquake catalog. Seismotectonic map for the study area was prepared by superimposing the earthquake events on the seismogenic sources. DSHA was then performed by dividing the study area into grids of size 0.02o × 0.02o (approximately 2 km × 2 km) using a MATLAB code, considering three different attenuation relationships for the stable continental region. Land use (LU) map for the region was developed from LANDSAT 8 data using various GIS platforms. Hazard contour map prepared using ArcGIS, was then overlaid on the LU map to comprehend the seismic risk of the region. It was observed that, though the wards south-west of the city shows higher Peak Ground Acceleration (PGA) values, the wards north-east of the city have larger and denser built-up areas, increasing its vulnerability, in the event of an earthquake.

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Research paper thumbnail of Coastal reservoir strategy to enhance India's freshwater storage by impounding river flood waters: a detailed overview

Water Supply, 2018

This paper revisits the water resource scenario in India and presents the adequacy of the coastal... more This paper revisits the water resource scenario in India and presents the adequacy of the coastal reservoir concept to address water scarcity by impounding excess river flood waters. Although there has been no significant change in India's rainfall pattern in the last 100 years, there is a spatial non-uniformity in the rainfall events that occur which makes it difficult to pre-plan large-scale water storage at different locations. This study highlights the fact that there is enough water available but the deficiency is in storage. A large portion of freshwater from river systems, groundwater and wetlands drains into the sea due to insufficient storage facilities. Coastal reservoirs enable the storage of excess river flood waters near the coast for future use. This paper discusses current water supply solutions available in the country, and the efficacy of coastal reservoirs along with feasibility implications. The associated rewards and challenges are also discussed. The paper p...

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Research paper thumbnail of Earthquake Hazard Assessment

Earthquake Hazard Assessment, 2018

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Research paper thumbnail of Characterization of Regional Seismic Source Zones in and around India

Seismological Research Letters, 2012

... We created separate catalogs for each zone, and based on the threshold magnitude, estimated t... more ... We created separate catalogs for each zone, and based on the threshold magnitude, estimated the ... rate studies (Wiemer and Wyss 1997, 1997) as well as hazard-related studies (Frankel ... Another crucial development in this method is that the space-time distance is based on ...

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Research paper thumbnail of Probabilistic seismic hazard analysis of Tripura and Mizoram states

Natural Hazards, 2013

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Research paper thumbnail of An Investigative Study of Seismic Landslide Hazards

Proceedings of the conference on Recent Advances in Rock Engineering (RARE 2016), 2016

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Research paper thumbnail of A Revisit to Seismic Hazard at Uttarakhand

International Journal of Geotechnical Earthquake Engineering, 2015

This paper presents the seismic hazard of the state of Uttarakhand in India, located at the footh... more This paper presents the seismic hazard of the state of Uttarakhand in India, located at the foothills of the seismically active Himalayan mountain ranges. In the present study, an updated catalog of earthquakes has been prepared for Uttarakhand which was homogenized into a unified moment magnitude scale after declustering of the catalog to remove aftershocks and foreshocks. Various source zones were identified in the study area to account for local variability in seismicity characteristics. The seismicity parameters were estimated for each of these source zones, which are necessary inputs into seismic hazard estimation of a region. The seismic hazard evaluation of the region based on a state-of-the art PSHA study was performed using the classical Cornell–McGuire approach with different source models and attenuation relations. The most recent knowledge of seismic activity in the region was used to evaluate the hazard, incorporating uncertainty associated with different modeling param...

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Research paper thumbnail of Deterministic seismic hazard analysis for Phuentsholing region of southern Bhutan considering local site effects

Innovative Infrastructure Solutions

Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development ... more Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development of infrastructure over time, the safety of the residence and lifeline buildings becomes a matter of concern. Bhutan lies in the Himalayan mountain ranges, which is considered one of the most active regions for seismic events. The Indian seismic code, IS 1893-2016, has assigned Zone IV for the region, which signifies the large risk that exists for all the structures. Therefore, conducting a seismic hazard assessment for the site becomes extremely necessary before any major construction. The present study focuses to perform the deterministic seismic hazard analysis (DSHA) around certain points of interest in the town of Phuentsholing, in Bhutan. Furthermore, site-specific response spectra for Pipaldhara-1, Pipaldhara-2, Kabreytar-1, Kabreytar-2 and Phuentsholing town were plotted from the results of the DSHA. It is estimated that a peak ground acceleration ranging from 0.11 to 0.14 g can be anticipated at the level of bedrock in the study region. Response spectra were plotted for the ground level using appropriate soil-amplification coefficients, derived from the analyses in the DEEPSOIL program.

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Research paper thumbnail of Deterministic Seismic Hazard Analysis of Grand Ethiopia Renaissance Dam (GERD)

Geotechnical, geological and earthquake engineering, 2022

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Research paper thumbnail of Deterministic seismic hazard analysis for Phuentsholing region of southern Bhutan considering local site effects

Innovative Infrastructure Solutions

Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development ... more Phuentsholing is a thriving border town in the southwestern part of Bhutan. With the development of infrastructure over time, the safety of the residence and lifeline buildings becomes a matter of concern. Bhutan lies in the Himalayan mountain ranges, which is considered one of the most active regions for seismic events. The Indian seismic code, IS 1893-2016, has assigned Zone IV for the region, which signifies the large risk that exists for all the structures. Therefore, conducting a seismic hazard assessment for the site becomes extremely necessary before any major construction. The present study focuses to perform the deterministic seismic hazard analysis (DSHA) around certain points of interest in the town of Phuentsholing, in Bhutan. Furthermore, site-specific response spectra for Pipaldhara-1, Pipaldhara-2, Kabreytar-1, Kabreytar-2 and Phuentsholing town were plotted from the results of the DSHA. It is estimated that a peak ground acceleration ranging from 0.11 to 0.14 g can be anticipated at the level of bedrock in the study region. Response spectra were plotted for the ground level using appropriate soil-amplification coefficients, derived from the analyses in the DEEPSOIL program.

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Research paper thumbnail of Liquefaction

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Research paper thumbnail of Kerala

Geotechnical Characteristics of Soils and Rocks of India, 2021

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Site Characterization Using Satellite Data and Estimation of Seismic Hazard at Ground Surface

Lecture Notes in Civil Engineering, 2021

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Research paper thumbnail of Embodied Energy and Carbon Emissions of Pavements: A Review

Energy consumption takes place at each stage of pavement construction, right from extraction of r... more Energy consumption takes place at each stage of pavement construction, right from extraction of raw materials to finished products like roads. Carbon emission is an undesirable product that materializes simultaneously with energy consumption that is indispensable right through the construction activities. Reusability is another important feature that we should consider when we speak about sustainability. Though pavements made of bitumen have a higher embodied energy, it readily yields to recycling, when compared to concrete pavements, thereby reducing the energy consumed. Reducing consumed energy helps to save the resource for the future. Many situations warrant compromised sustainability when a particular type of pavement is preferred to serve a special function. In such cases, alternative materials with low embodied energy and low carbon emission may be used for the pavement design. Designs using waste materials and recycled materials would help to make energy-efficient pavements ...

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Research paper thumbnail of Resilient Infrastructures and Disaster Risk Reduction—An Introduction

Resilient Infrastructure, 2021

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Research paper thumbnail of Strategic Analysis on the Potential of Coastal Reservoirs in Reshaping Indian Coastal Economic Corridor

International Journal of Ocean and Coastal Engineering, 2019

In general, people like to live near the coast because of a better aesthetical pleasing living en... more In general, people like to live near the coast because of a better aesthetical pleasing living environment, access to a variety of recreational activities and more job opportunities. Consequently, more than 50% of the world’s population live within 200[Formula: see text]km of the coast, and ¾ of the world’s megacities are situated by the shore. Significant pressure on land, water supply, waste management and other infrastructures appear in these coastal cities. India, which hosts one-sixth of the world’s population is looking for strategies to manage India’s coastal cities, water, land and human resources. This paper reviews China’s experience in water resources development for coastal cities. China’s coastal economic corridor (CEC) contributes 60% of the national GDP, which needs plentiful water supply to sustain its coastal cities. The present investigation shows that India has better natural conditions to develop its CEC. Among the coastal infrastructures, coastal reservoirs (i.e...

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Research paper thumbnail of Seismic Bearing Capacity Factor Considering Composite Failure Mechanism

International Journal of Geotechnical Earthquake Engineering, 2018

This article describes how the design of shallow foundation needs complete knowledge about bearin... more This article describes how the design of shallow foundation needs complete knowledge about bearing capacity. During earthquakes additional lateral force acts at the foundation bed which reduces the bearing capacity. Most of the literature present either the pseudo static analysis or assume a planar failure surface to estimate seismic bearing capacity factors. Here, a pseudo dynamic approach that considers the time dependent effect of earthquake loading is employed. A composite failure surface has been considered for a more realistic estimation of seismic bearing capacity. New expressions were formulated to arrive at the seismic bearing capacity factor, considering the forces acting on the failure wedge based on the limit equilibrium approach. The effect of soil friction angles and the seismic peak of horizontal ground accelerations on the seismic bearing capacity were studied using the proposed method. It was observed that present pseudo-dynamic analysis with a composite failure mec...

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Research paper thumbnail of Seismic Site Characterization

Comprehensive Seismic Zonation Schemes for Regions at Different Scales, 2018

This chapter describes different methodologies available for site characterization. The details o... more This chapter describes different methodologies available for site characterization. The details of different low strain and high strain tests are also listed in this chapter. It also provides procedures for the evaluation of dynamic properties from the laboratory as well as in-situ tests. Further, this chapter also presents site characterization studies carried out at micro as well as macro-level.

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Research paper thumbnail of Joint Time Frequency Analysis Based Synthesis of Acceleration-Time History and Response Spectra for Japanese Earthquakes

Lecture Notes in Civil Engineering, 2021

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Research paper thumbnail of Seismic Risk Assessment for Coimbatore Integrating Seismic Hazard and Land Use

Indian cities are expanding not only in terms of built environment but also in population. Multi-... more Indian cities are expanding not only in terms of built environment but also in population. Multi-story buildings are rising rapidly to accommodate the growing population, undesirably even in hazard prone areas. Such a scenario calls for a proper disaster risk reduction program and plan to control the inevitable damage to lives and properties. Earthquakes are destructive only if the factors that increase the damages prevail. Attention should be given to crowded cities with people and infrastructure vulnerable to hazard. This study presents the details of deterministic seismic hazard analysis (DSHA) done for Coimbatore city of the state of Tamil Nadu, India using the latest available information on seismicity of the region. The earthquake data was compiled from different agencies and homogenized in a unified moment magnitude scale to create an updated earthquake catalog. Seismotectonic map for the study area was prepared by superimposing the earthquake events on the seismogenic source...

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Research paper thumbnail of Seismic Risk Assessment for Coimbatore Integrating Seismic Hazard and Land Use

Proceedings of GeoShanghai 2018 International Conference: Geoenvironment and Geohazard, 2018

Indian cities are expanding not only in terms of built environment but also in population. Multi-... more Indian cities are expanding not only in terms of built environment but also in population. Multi-story buildings are rising rapidly to accommodate the growing population, undesirably even in hazard prone areas. Such a scenario calls for a proper disaster risk reduction program and plan to control the inevitable damage to lives and properties. Earthquakes are destructive only if the factors that increase the damages prevail. Attention should be given to crowded cities with people and infrastructure vulnerable to hazard. This study presents the details of deterministic seismic hazard analysis (DSHA) done for Coimbatore city of the state of Tamil Nadu, India using the latest available information on seismicity of the region. The earthquake data was compiled from different agencies and homogenized in a unified moment magnitude scale to create an updated earthquake catalog. Seismotectonic map for the study area was prepared by superimposing the earthquake events on the seismogenic sources. DSHA was then performed by dividing the study area into grids of size 0.02o × 0.02o (approximately 2 km × 2 km) using a MATLAB code, considering three different attenuation relationships for the stable continental region. Land use (LU) map for the region was developed from LANDSAT 8 data using various GIS platforms. Hazard contour map prepared using ArcGIS, was then overlaid on the LU map to comprehend the seismic risk of the region. It was observed that, though the wards south-west of the city shows higher Peak Ground Acceleration (PGA) values, the wards north-east of the city have larger and denser built-up areas, increasing its vulnerability, in the event of an earthquake.

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Research paper thumbnail of Coastal reservoir strategy to enhance India's freshwater storage by impounding river flood waters: a detailed overview

Water Supply, 2018

This paper revisits the water resource scenario in India and presents the adequacy of the coastal... more This paper revisits the water resource scenario in India and presents the adequacy of the coastal reservoir concept to address water scarcity by impounding excess river flood waters. Although there has been no significant change in India's rainfall pattern in the last 100 years, there is a spatial non-uniformity in the rainfall events that occur which makes it difficult to pre-plan large-scale water storage at different locations. This study highlights the fact that there is enough water available but the deficiency is in storage. A large portion of freshwater from river systems, groundwater and wetlands drains into the sea due to insufficient storage facilities. Coastal reservoirs enable the storage of excess river flood waters near the coast for future use. This paper discusses current water supply solutions available in the country, and the efficacy of coastal reservoirs along with feasibility implications. The associated rewards and challenges are also discussed. The paper p...

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Research paper thumbnail of Earthquake Hazard Assessment

Earthquake Hazard Assessment, 2018

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Research paper thumbnail of Characterization of Regional Seismic Source Zones in and around India

Seismological Research Letters, 2012

... We created separate catalogs for each zone, and based on the threshold magnitude, estimated t... more ... We created separate catalogs for each zone, and based on the threshold magnitude, estimated the ... rate studies (Wiemer and Wyss 1997, 1997) as well as hazard-related studies (Frankel ... Another crucial development in this method is that the space-time distance is based on ...

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Research paper thumbnail of Probabilistic seismic hazard analysis of Tripura and Mizoram states

Natural Hazards, 2013

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