Lakshminarayan Satpati

Abstract: The present study assessed climate change vulnerability in agricultural sector of low-lying Sagar Island of Bay of Bengal. Vulnerability indices were estimated using spatially aggregated biophysical and socio-economic parameters by applying principal component analysis and equal weight method. The similarities and differences of outputs of these two methods were analysed across the island. From the integration of outputs and based on the severity of vulnerability, explicit vulnerable zones were demarcated spatially. Results revealed that life subsistence agriculture in 11.8% geographical area (2829 ha) of the island along the western coast falls under very high vulnerable zone (VHVZ VI of 84–99%) to climate change. Comparatively higher values of exposure (0.53 ± 0.26) and sensitivity (0.78 ± 0.14) subindices affirmed that the VHV zone is highly exposed to climate stressor with very low adaptive capacity (ADI= 0.24 ± 0.16) to combat vulnerability to climate change. Hence, food security for a population of >22 thousands comprising >3.7 thousand agrarian households are highly exposed to climate change. Another 17% area comprising 17.5% population covering 20% villages in north-western and eastern parts of the island also falls under high vulnerable (VI= 61%–77%) zone. Findings revealed large spatial heterogeneity in the degree of vulnerability across the island and thus, demands devising area specific planning (adaptation and mitigation strategies) to address the climate change impact implications both at macro and micro levels.

TL;DR: In this paper, a study comprehensively assessed soil site suitability for selected winter crops in the coastal saline agro-ecological environment of Sagar Island, India by integrating land limitation and crop suitability evaluation framework of FAO Soil properties (eg texture, pH, organic carbon; SOC, electrical conductivity; EC and available macronutrients- NPK) were obtained through extensive grid-based soil sampling and estimation in the laboratory following standard procedures.

TL;DR: The present study highlights the adaptive capacity of crop planning including abiotic stress-tolerant cultivars to monsoon rainfall variability for sustaining rainfed rice production vis-à-vis food and livelihood security in vulnerable islands of coastal ecosystem.

TL;DR: In this paper, a set of relevant morphodynamic variables like rainfall, discharge, groundwater, geology and soil, and also human factors have been considered for understanding the nature of river bank erosion.

TL;DR: In this paper, the authors examined the role of man as an important controlling element of a river system and examined the human interventions over river, as a control system, and discussed about the associated changing characters of river behaviour as the response, e.g. longitudinal profile has been changed temporally due to human impact; cross profiles have been changed due to the impact of bridge and other human influences; and the tidal discharge of the river has been altered downstream upward due to intake of water for different purposes.