A5014541907- Coral and Marine Ecosystems Studies
- Water Quality Monitoring Technologies
- Hydrology and Drought Analysis
- Water Quality Monitoring and Analysis
- Flood Risk Assessment and Management
- Water Quality and Pollution Assessment
- Marine and fisheries research
- Remote Sensing in Agriculture
- Climate variability and models
- Urban Heat Island Mitigation
- Hydrology and Watershed Management Studies
- Transboundary Water Resource Management
- Aquatic Ecosystems and Biodiversity
- Remote-Sensing Image Classification
- Marine and coastal ecosystems
- Climate change impacts on agriculture
- Mineral Processing and Grinding
- Oil Spill Detection and Mitigation
- Climate change and permafrost
- Wetland Management and Conservation
- Ichthyology and Marine Biology
- Spacecraft Design and Technology
- Reservoir Engineering and Simulation Methods
- Precipitation Measurement and Analysis
- Plant Water Relations and Carbon Dynamics
Indian Space Research Organisation
2014-2025
Space Applications Services (Belgium)
2022
Institute for International Studies and Training
2022
Indian Institute of Space Science and Technology
2021
Remote sensing is a vital tool to assess water quality parameters in bodies like rivers, lakes, estuaries and lagoons.All these fall under the category of optically complex waters (case 2), where water-leaving radiance affected by active constituents bottom substrate.The present study estimates parameters, viz.turbidity, suspended sediment concentration chlorophyll River Ganga Buxar (Bihar), Howrah (West Bengal) Chilika lagoon (Odisha) using hyperspectral reflectance data...
Sea Surface Temperature is a critical physical attribute of coastal marine habitats. Remote sensing from satellite the most widely used approach for monitoring stress on coral reef ecosystems large scale. Regional bleaching framework has been applied in five major Indian regions to investigate threats. Degradation reefs environmental problem worldwide. ENSO (El Niño Southern Oscillation) event one extreme climate change event, which elevate Temperatures (SSTs) tropical oceans. This warming...
Coral reefs are one of the most ancient, highly productive marine bio-diverse ecosystems on earth.They threatened to collapse under rapid climate change.ENSO is an extreme change event which elevates sea-surface temperature (SST) tropical oceans.This elevated SST increases level thermal stress coral reefs.Also, sensitive among all due change; they exhibit bleaching when exceeds normal summer maxima and remains high for more than 28 days.Bleaching threshold, positive anomaly degree heating...
Abstract. Aquatic macrophytes are important elements of freshwater ecosystems, fulfilling a pivotal role in the ecological functions these environments and biogeochemical cycles. Although aquatic beneficial, some species can hinder human activity. They clog reservoirs reduce water availability for needs. Surveys hindered by logistic problems, remote sensing represents powerful alternative, allowing comprehensive assessment monitoring. The objectives this study was to map temporal changes...
Abstract. Dynamics, distribution and quality of water has a direct impact on environment its dependent human activities. Regular monitoring these hydrological processes help in understanding cycle better management policy making. Recent increase remote sensing satellites offer multiple observations with high spatial temporal resolution, thus calling for extensive use end computational resources. Google Earth Engine(GEE) is an open Application Programing Interface (API), which offers free...
Abstract Spatiotemporal analysis of droughts is important especially for future climate scenarios. We use complex network theoretic measures to understand spatiotemporal properties precipitation‐driven meteorological drought across India in past and construct networks using event synchronization (ES) moderate extreme conditions derived Standardized Precipitation Index at an aggregated scale 6 months (SPI‐6). Network like degree, closeness, betweenness directionality are used events. ES‐based...
Abstract Drought analysis is an important part of risk management plan. usually characterized by variables such as severity and duration. Using standardized precipitation index (SPI) at aggregated scale 12 months, we construct different copula models for river basins India. Based on goodness fit tests, suitable distributions are selected duration severity. These marginal then used to from amongst‐Frank, Gumbel, Clayton Student's t copula. It found that some Frank can capture the dependence...
Turbidity is an optical determination of water clarity. It one the most important optically active parameter to assess quality through remote sensing observations. measurements come from suspension sediment such as silt or clay, inorganic materials, organic matter algae, plankton and decaying material. total suspended often overlap each other. However, it not a direct measurement materials in water. Instead, measure relative clarity, turbidity used indicate changes solids concentration...
The study investigates seasonal variations in chlorophyll content and water quality, emphasizing their impact on vegetation growth ecosystem health, with a focus the pre-monsoon, monsoon, post-monsoon seasons. Over five-year period, pre-monsoon emerges as critical for vitality, marked by higher levels due to favorable conditions like optimal temperature, moisture, nutrients. northern region stands out hotspot elevated content. During monsoon seasons, fluctuates erratic rainfall, variable...
Thermal Infrared Imaging Spectrometer (TIS), which operates in the infrared spectral region (7-13 μm), is one of five instruments on-board Mars Orbiting Mission (MOM). TIS was designed to detect emitted thermal radiation from Martian environment, would enable estimation ground temperature surface and also map its composition. instrument a grating-based spectrometer has spatial resolution 258 m at periapsis (372 km). hardware realized with light-weight miniaturized components (total weight...
Remote sensing measurements in coral reef environments commonly confront the problem of overlying atmosphere and modification spectral signal due to water column over bottom substrates. In order correct these problems, hyperspectral observations offer an advantage multispectral observations. Airborne remote data from Visible Infrared Imaging Spectrometer- Next Generation (AVIRIS-NG) sensor was acquired during low tidal condition on 14 February 2016 at Pirotan reef, Gulf Kachchh region,...
In this study we identify a region of submarine groundwater discharge (SGD) near Okha coast, Gujarat, India using thermal infrared remote sensing technique.Observations brightness temperature (BT) in the spectral (10.6-11.19μm) from Landsat-8 satellite coastal showed unique localized cooling Arabian Sea during winter.We observed lowering BT range 0.6°-2.3°C associated with SGD comparison to sea surface ocean low-tide conditions.Consistent geographical pattern contrast was same location...
Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI
This article highlights major scientific outcomes of the studies carried out using Airborne Visible/Infrared Imaging Spectrometer-Next Generation (AVIRIS-NG) airborne data over coastal regions Mangaluru, Gulf Kachchh (GoK) and Chilika lagoon.Various hyperspectral remote sensing techniques involving bio-optical models spectral classification algorithms are used to achieve different objectives related ecosystem monitoring.AVIRIS-NG estimate particle size suspended solids along waters Mangaluru...
Turbidity is one of the important water quality parameters, which required to understand eco-hydrological process such as a trophic state water, soil erosion into river system, mixing other sources, runoff, discharge etc. An algorithm has been developed estimate turbidity (in NTU: Nephelometric Unit) over inland waters using Red band optical multispectral dataset. Field measurements were carried out Ukai reservoir for 27-28th March 2018 pre monsoon and 27-30th September post seasons,...
Abstract. Land Surface Temperature (LST) is an important parameter in the land surface processes on regional and global scale. The Diurnal (LSTD) cycle of different cover excellent indicator their interaction with planetary boundary layer. Kalpana-1 very high resolution radiometer (VHRR) LST product available 30 minute spatial 0.1 degree temporal resolution. A study was carried out objective to determine LSTD parameters directly from K1-VHRR monthly averaged observations over Indian...
Abstract Floods are one of the most common natural disasters. In recent decades, climate change has increased occurrence and severity floods, which is exacerbated by population growth. Pakistan witnessed its devastating floods during monsoon 2022. present study, spatio-temporal characteristics 2022 in Indus river basin been studied using an integrated framework multi-satellite observations hydrological modelling. Satellite sensors including Synthetic Aperture Radar (SAR), passive microwave...