Faculty Publications
Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736
Publications by NITK Faculty
Browse
3 results
Search Results
Item Overview of Water Resources in Kerala and Feasibility of Coastal Reservoirs to Ensure Water Security(Springer Science and Business Media Deutschland GmbH, 2022) Amala Krishnan, U.S.; Kolathayar, S.Kerala is rich with the beauty of nature, greenery, backwaters, rivers, etc. All the rivers are entirely monsoon-fed and many of them shrink into rivulets or dry up completely during dry months. The total runoff of all rivers adds to about 70,300 million cubic meters. The average rainfall of the State is reported as 3055 mm, which is double the national average. The water received as precipitation drains quickly into the sea due to the physiographical pattern and topography of the region. The farming activities get affected adversely due to the erratic rainfall pattern, which in turn affects the food security of the state. This paper presents the current scenario of water resources in the state and proposes alternative ways to ensure water security considering the unique geography of the state. The annual water demand of Kerala state is around 45.36 TMC feet and the total runoff of all rivers adds to about 2500 TMC feet. Kerala’s coast spans over 570 km and has excellent potential to store freshwater in coastal reservoirs. The capacity to store the water is huge without acquiring land and zero displacements of people. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.Item Landslides and debris flow triggered by the July 2024 extreme rainstorm in the Chooralmala watershed in Wayanad, India(Springer Science and Business Media Deutschland GmbH, 2025) Kolathayar, S.; Menon, V.; Kundu, P.[No abstract available]Item Deterministic Seismic Hazard Analysis of Sree Padmanabhaswamy Temple, Kerala State(Springer, 2025) Padmanabhan, M.P.H.; Siddhardha, R.; Kolathayar, S.; Hegde, R.; Beekanahalli Mokshanatha, B.M.Deterministic seismic hazard analysis (DSHA) is a technique employed to estimate potential hazards and ground shaking resulting from specific earthquake scenarios at a given location. In the present study, DSHA is conducted for the Sree Padmanabhaswamy Temple, situated in the southernmost district of Kerala, India. This seismic hazard study is crucial due to the temple’s proximity to seismic events such as the 1900 AD Coimbatore earthquake with a magnitude of 6.3 Mw and the 2000 Pala earthquake with a magnitude of 4.7 Mw. This study examines earthquake data within a 500 km radius surrounding the Sree Padmanabhaswamy Temple in Thiruvananthapuram District, Kerala, from 1819 to 2022 AD. The seismic zone of the temple site is III according to the Indian zonation map (IS 1893 (Part 1): 2016), relying on past earthquakes recorded throughout India. The collected earthquake data underwent a homogenization process to determine the moment magnitude (Mw), distinguishing foreshocks and aftershocks from the main shocks. A seismotectonic map was developed comprising of geological discontinuities and 316 earthquakes events with moment magnitudes between 3.0 and 6.3 Mw. The software tools employed for this work include MATLAB, QGIS and ZMAP. The Log-likelihood technique (LLH) was used to choose the ground motion prediction equations (GMPEs) for the location. The GMPEs were then given weights based on the computed values of the data support index (DSI). The study region was partitioned into a grid size of 0.05° × 0.05° (5 km × 5 km). Using MATLAB code, the peak ground acceleration (PGA) was estimated for the site and PGA was found in the center of each grid cell, taking into account all seismic sources within a 500 km radius. In addition, site-specific deterministic spectrum was also developed. The findings show that Sree Padmanabhaswamy Temple has low seismicity, which is defined by weak to moderate earthquakes that have sources close to the temple. © The Author(s), under exclusive licence to Indian Geotechnical Society 2024.