R. S. Ajin

R. S. Ajin
University of Florence | UNIFI · Department of Earth Sciences

M. Sc. Applied Geology

About

41
Publications
44,068
Reads
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660
Citations
Additional affiliations
June 2018 - February 2020
Idukki District Disaster Management Authority
Position
  • Analyst
December 2017 - May 2018
Kerala State Disaster Management Authority
Position
  • Analyst
December 2017 - December 2022
Kerala State Disaster Management Authority
Position
  • Analyst
Education
June 2010 - April 2012
University of Madras
Field of study
  • Applied Geology
June 2007 - April 2010
University of Kerala
Field of study
  • Geology

Publications

Publications (41)
Article
Full-text available
In this study, a landslide susceptibility assessment is performed by combining two machine learning regression algorithms (MLRA), such as support vector regression (SVR) and categorical boosting (CatBoost), with two population-based optimization algorithms, such as grey wolf optimizer (GWO) and particle swarm optimization (PSO), to evaluate the pot...
Article
Full-text available
Flooding is a recurrent hazard occurring worldwide, resulting in severe losses. The preparation of a flood susceptibility map is a non-structural approach to flood management before its occurrence. With recent advances in artificial intelligence, achieving a high-accuracy model for flood susceptibility mapping (FSM) is challenging. Therefore, in th...
Article
Full-text available
Landslides are among the most perilous hazards that usually happen in hilly terrains. The loss that ensues during a landslide, especially in highly-populated regions, calls for a vulnerability study. Thus, the purpose of this research is to detect landslide-vulnerable villages in a small part of the Western Ghats, an orographic mountain chain in So...
Article
Full-text available
Landslides are prevalent in the Western Ghats, and the incidences that happened in 2021 in the Koottickal area of the Kottayam district (Western Ghats) resulted in the loss of 10 lives. The objectives of this study are to assess the landslide susceptibility of the high-range local self-governments (LSGs) in the Kottayam district using the analytica...
Article
Full-text available
Wildfires are one of the gravest and most momentous hazards affecting rich forest biomes worldwide; India is one of the hotspots due to its diverse forest types and human-induced reasons. This research aims to identify wildfire risk zones in two contrasting climate zones, the Wayanad Wildlife Sanctuary in the Western Ghats and the Kedarnath Wildlif...
Article
Wildfires are a common threat to the Western Ghats region in India, and many protected areas within the Ghat region have been severely battered in the past. This study aims to identify the wildfire risk zones in the Neyyar wildlife sanctuary using GIS technology. The causative factors selected are land cover types, digital elevation model-derived v...
Article
Full-text available
Dengue fever, which is spread by Aedes mosquitoes, has claimed many lives in Kerala, with the Thiruvananthapuram district bearing the brunt of the toll. This study aims to demarcate the dengue risk zones in Thiruvananthapuram district using the analytical hierarchy process (AHP) and the fuzzy-AHP (F-AHP) methods. For the risk modelling, geo-environ...
Article
Idukki district, situated in the Western Ghats of Peninsular India, is one of the high landslide susceptible zones with frequent landslide occurrences during monsoon. Though plentiful studies have been carried out, this study aims to utilize a model based on a decision tree, called the REPTree algorithm, and its ensemble models such as Random Subsp...
Article
Full-text available
Landslides are the most frequently occurring geohazard in the Western Ghats due to the steep terrain and heavy rainfall the area receives. This research aims to develop a framework to demarcate the zones susceptible to landslides employing geographic information system (GIS) technique. The Western Ghats region in Kollam district is selected for the...
Article
Soil erosion is a severe environmental problem worldwide, especially in tropical regions. The Revised Universal Soil Loss Equation (RUSLE), one of the universally accepted empirical soil erosion models, is quite commonly used in tropical climatic conditions to estimate the magnitude and severity of soil erosion. This study, apart from identifying t...
Article
Full-text available
Flooding is one of the most destructive natural catastrophes that can strike anywhere in the world. With the recent, but frequent catastrophic flood events that occurred in the narrow stretch of land in southern India, sandwiched between the Western Ghats and the Arabian Sea, this study was initiated. The goal of this research is to identify flood-...
Article
Full-text available
In recent years, landslides have become a typical monsoon calamity in the Western Ghats region of Kerala, India. In addition to property damage, heavy rainfall (36% above normal) and multiple landslides (4728) killed 48 people in 2018. This tendency continued throughout the monsoon seasons of 2019, 2020, and 2021, resulting in the deaths of over 10...
Article
Full-text available
Wildfires pose a major threat to the forest ecosystems and species of the Western Ghats’ protected areas. Fires have also ravaged the Silent Valley National Park in the past. This study aimed to map the fire risk zones using the analytical hierarchy process (AHP) method, to assess the effect of each factor on the occurrence of fire and to assess th...
Article
The present study was done in order to simulate the flash-flood susceptibility across the Suha river basin in Romania using a number of 3 hybrid models and fuzzy-AHP multicriteria decision-making analysis. It should be noted that flash-flood events are triggered by heavy rainfall in small river catchments. To achieve the proposed results, a total o...
Preprint
Full-text available
The present study aims to estimate the flood susceptibility degree over the Prahova River basin located in the central-southern part of Romania. To obtain the proposed outcomes, the next 10 flood predictors were used as independent variable in the machine learning models: slope angle, convergence index, distance from river, elevation, plan curvatur...
Article
Full-text available
Forest fire is one of the most common natural hazards occurring in the Western Ghats region of Kerala and is one of the reasons for forest degradation. This natural disaster causes considerable damage to the biodiversity of this region during the dry fire season. The area selected for the present study, Eravikulam National Park, which is predominan...
Article
Full-text available
This study aims to demarcate landslide susceptible zones using methods of analytical hierarchy process (AHP) and frequency ratio (FR) to find the most influencing factors and to compare their prediction capability. Ten causative factors (slope angle, elevation, lithology, land use/land cover types, normalized difference moisture index, road buffer,...
Article
Full-text available
Landslides are one of the most common geohazards occurring in the Western Ghats region of Kerala, causing substantial loss of life and property. The present study aims to demarcate the landslide susceptible zones in the Western Ghats region of Thiruvananthapuram district using GIS techniques. The analytical hierarchy process (AHP) and fuzzy-analyti...
Article
Full-text available
Forest fires are one of the most common natural hazards that occur in the Western Ghats region. There are many protected areas in this part of the Western Ghats; therefore, fire can pose a serious threat to habitats and wildlife. In the past, fires have also affected the Parambikulam Tiger Reserve. The objectives of this study are to demarcate the...
Article
Full-text available
Forests are invaluable natural resources for the sustenance of terrestrial as well as atmospheric environment. Forests are often threatened by factors like deforestation and global warming. Past records have shown that one major cause of loss of forests is fires. A forest fire whether natural or human induced can pose serious threat to the fragile...
Article
Full-text available
The forests of the Western Ghats in India are often affected by wildfires. Such forest fires are potential hazards seriously damaging the environment. Wildfire occurrence in an area is influenced by environment, terrain, and climatic conditions, alongside with human activities. The records on previous forest fire data show that the present study ar...
Article
Full-text available
Fires are one of the most common disasters occurring in forests, which adversely affect forest resources, biodiversity and endanger lives. The present study area, Peechi-Vazhani Wildlife Sanctuary is also prone to forest fires, where a total of 22 forest fires occurred during the last decade. The aim of this study is to demarcate the fire risk zone...
Article
Full-text available
A Forest fire is a major environmental disaster occurring in many countries of the world, causing damage to ecology, economy, and property. This natural phenomenon causes major changes in the forest structure and function, and above all this, it endangers wildlife. Fires are one of the major natural risks in the forests of the Western Ghats, a biod...
Article
Full-text available
A landslide is a geological phenomenon that describes a wide variety of ground movement processes, like rock falls or debris flows. Landslides, also known as landslips, slumps, or slope failures are the most common geo-hazards occurring in highland regions, especially mountainous regions. This phenomenon can be caused by natural factors or by human...
Article
Full-text available
Forest fires are of common occurrence in parts of Wayanad Wildlife Sanctuary in the central western slopes of Western Ghats, especially during the months from February to April. They pose great threat to forest vegetation, animal life and scattered human settlements. The present study aims to demarcate forest fire risk zones in Wayanad Wildlife San...
Article
Full-text available
In recent years, forest fires have become a major disaster in many countries of the world because of their impact on biodiversity, landscape, health, environment, ecology and economy. Forest fires are one of the major natural hazards occurring in the forests of the Western Ghats, a biodiversity hotspot in India. The present study aims to demarcate...
Article
Full-text available
Forest fires are the most common natural disturbance occurring in the Western Ghats, especially during the summer season. The present study area is also prone to forest fires. In this study, an attempt has been made to locate and map the potential fire risk zones in the Periyar Tiger Reserve using geospatial techniques. The factors selected in this...
Article
Full-text available
Forest fires represent one of the major natural disasters that are common in the tropical forests of India. The forests in Thenmala forest division are also prone to fires. The objective of this study is to demarcate the fire risk zones in Thenmala forest division using geospatial tools. A Fire Risk Index model has been developed considering the la...
Article
A three-dimensional geodetic network is composed by a system of points located on earth " s surface, on an engineering work territory, points which have a known position in an unitary reference coordinate system. Geodetic networks play a significant role in the attainable accuracy of surveying and mapping applications. This paper presents a three-d...
Article
Full-text available
Wildfires bursting into forests are one of the major natural hazards in the Western Ghats region of Kerala. The aim of the present study is to demarcate the forest and wildfire risk zones in Nemmara Forest Division. This area frequently faces wild land and forest fire. In this study a combination of Remote Sensing and GIS technology has been used t...
Article
Full-text available
A three-dimensional geodetic network is composed by a system of points located on earth's surface, on an engineering work territory, points which have a known position in an unitary reference coordinate system. Geodetic networks play a significant role in the attainable accuracy of surveying and mapping applications. This paper presents a three-dim...
Conference Paper
Full-text available
Forest Fire can cause considerable environmental damage and brings about significant change in the ecosystem of a region. The selected study area, Idukki Wildlife Sanctuary is prone to forest fires. The present study aims to demarcate forest fire risk zones of Idukki Wildlife Sanctuary in Kerala using GIS and Remote Sensing techniques. ArcGIS 9.3 a...
Conference Paper
Full-text available
Forest fire is a common problem in the Western Ghats regions of Kerala. Therefore forest fire risk analysis is necessary for forest management. The present study area is also prone to forest fires. The present study deals with the identification of fire risk zones in Peppara Wildlife Sanctuary, Western Ghats mountain region, Kerala using GIS and Re...
Conference Paper
Full-text available
Landslides are one of the natural disasters which account for huge damage of properties in terms of direct and indirect risk (Dai et al., 2002). The term “landslide” basically means a slow to rapid downward movement of instable rock and debris masses under the action of gravity which can be categorized into various types on the basis of failure cha...
Conference Paper
Full-text available
ABSTRACT Floods are the most common type of natural hazards due to its devastating effects in the affected area, and in the world it accounts for 31% of the economic losses resulting from natural hazards. Due to prolonged rainfall and related human activities, it is frequent in river basins. In the present study, Flood hazard prone areas in Achanko...

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