On the use of SAR and optical data in assessment of flooded areas

Spasova, Temenuzhka; Nedkov, Roumen

doi:10.1117/12.2533660

Cited by 7 publications

(6 citation statements)

References 9 publications

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“…The NDWI is a remote sensing based indicator, sensitive to the change in the water content of the leaves. As well as NDVI, NDWI is derived from remote sensing data 13,14,15 , and it uses the differences in reflectance between two bands of the electromagnetic spectrum to identify the presence of water.…”

Section: Ndwimentioning

confidence: 99%

Using Sentinel-2 data for efficient monitoring and modeling of wetland protected areas

Ivanova,

Spasova,

Stankova

2023

Ninth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2023)

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Wetlands are ecologically vital habitats that play a crucial role in supporting biodiversity and providing essential ecosystem services. They are considered to be among the most productive ecosystems on the planet that provide numerous benefits.For the purposes of this study, Straldzha Complex Protected Area, Bulgaria was chosen as the object of investigation. Straldzha Complex Protected Area includes a reservoir and surrounding wetlands and meadows, the remains of the eastern part of the former Straldzha Plateau (the largest plateau ever in Bulgaria). The wetland is sensitive to human activities, related to the water management and unsustainable use of the former plateau as agricultural land.For the purposes of this study, data from Sentinel-2 satellite of the European Space Agency were used. The monitoring was carried out during the study period 2017 -2022. An index-based classification was used in the study, utilizing NDVI, NDWI and MSAVI2 indices for classifying the contents within the wetlands boundaries. NDGI model was applied as well, evaluating the vegetation dynamics in the marsh. The obtained results showed successful mapping and monitoring of wetlands. The wetlands are of high importance and should be protected and conserved to maintain the benefits they provide to the environment and society.The data and results of this research will be able to serve Destination Earth (DestinE), which is an ambitious initiative of the European Union to create a digital model of the Earth that will be used for monitoring the effects of natural and human activities on our planet, prediction of extreme events and adapting policies to the climate challenges. The data and models will serve the Bulgarian initiative for the construction of the Digital Twins, which is being pilot developed in the

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Section: Ndwimentioning

confidence: 99%

Using Sentinel-2 data for efficient monitoring and modeling of wetland protected areas

Ivanova,

Spasova,

Stankova

2023

Ninth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2023)

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“…This stems from the different wavelengths in the optical and microwave ranges, and the use of the microwave range appears to be more appropriate for the purposes of the study. With the help of radar images, the detection, identification and recognition of water, wet areas, wet snow, ice and rocks is easier and is applicable for polar research 12,13 .…”

Section: Data Acquisitionmentioning

confidence: 99%

“…SAR gives information about the presence of wet snow, ice and helps to identify ice rocks, as there is already a proven classification of objects 8,13 .…”

Section: Leeⓒ and Fujiⓒ And Lb/cc Indexmentioning

confidence: 99%

Creating a digital twin and polar digital space in Antarctica

Spasova

2023

Ninth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2023)

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Through the creation of a polar digital space and the data architecture in it, an attempt will be made to get as close as possible to the real possibilities of building a Digital Twin in the Antarctic or the polar region, and also to propose the European data policy in the Antarctic and the Arctic.The data sources and instruments at many of the Antarctic bases are not interoperable, and this creates a major problem for comparison and simulation modeling even on a single island, let alone a larger area or the Antarctic mainland.In most of the polar summer, the optical data is not of good quality due to the presence of frequent cloud cover. This necessitates the mandatory use of in situ data in order to verify the others.The purpose of this type of research is to enforce certain standards for data dissemination such as Open Data, Open Science, and also to show the dynamics of certain territories on Livingstone Island based on research from the summer of 2022-2023 through various methods, indices and applications, published on the project page 1 . The complex approach used in the research provides reliable, up-to-date and interoperable information, regardless of the geographical location of the objects and is devoid of subjective interference.The use of data from a drone, ground data from SEKONIC spectrometer, data from NAVAL RSV 421ship 2 , satellites isn't a new method, but a complex. Using the maximum number of applications and also creating an innovative weather station certainly brings even greater added value to society and science, which seriously investigates climate change in polar latitudes.A ground weather station AWG, powered by an environmentally friendly magnesium-air battery, was developed especially for a project of the Bulgarian Antarctic Base 3 .The data and models will serve the Bulgarian initiative for the construction of the Digital Twins in Antarctica and Arctica or Digital polar space, initiatives such as Oceans and Seas, which is being pilot developed in the

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“…The availability of ground-based data in addition allows effective and cost-effective monitoring of climate change in remote areas using SAR data. The SAR C-band enables the effective study of various objects [5][6][7][8][9][10][11][12][13][14][15] and especially wet snow and ice 3,4,[16][17][18][19] . Using SAR data, we studied the type of changes in the digital value of the reflected signal (Q) from various objects, including water in different phase states.…”

Section: Introductionmentioning

confidence: 99%

A synchronized remote sensing monitoring approach in the Livingstone island region of Antarctica

Spasova,

Avetisyan

2023

Ninth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2023)

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Data-driven innovations bring significant benefits to societies directly affected by global warming, as they underpin Global and European climate change policy. The application of a synchronous approach and interoperability of data from different sources for environmental monitoring in one of the most vulnerable to climate change regions in the World is the aim of this research. The research was conducted at Hannah Point peninsula, near the Bulgarian Antarctic base "St. Kliment Ohridski" on Livingstone Island, South Shetland Islands, Antarctica. The study area has high ecological importance for tracking the dynamics of processes not only on a local but also on a global scale. Various research sites with different groups of objects serving as environmental benchmarks were selected to be studied. The study objects include snow cover, wet snow, water, ice (including sea ice), herbaceous vegetation, lichens, mosses, soils, and sand. For each of the objects, ground GPS points were defined and in situ spectrometric measurements were performed. Data from an innovative automatic recording weather station (AWG), as well as various indicators and indices based on the spectral reflectance characteristics of the investigated objects in the optical and microwave range, were used. For their generation were used satellite images from Sentinel-1 and Sentinel-2 sensors of European Space Agency. Multiple optical indices were used to demonstrate the changes in the state of the objects for the summer season of 2022-2023. The data obtained and models used will serve the Bulgarian initiative for the construction of the Digital Twins, which is being on pilot developed in the Department of Aerospace Information (SRTI-BAS) and could be used by a wide range of scientists in the field of polar research as well as for climate change education. Open Data were used in this study, to promote the Open science policy and FAIR principles as much as possible.

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On the use of SAR and optical data in assessment of flooded areas

Cited by 7 publications

References 9 publications

Using Sentinel-2 data for efficient monitoring and modeling of wetland protected areas

Using Sentinel-2 data for efficient monitoring and modeling of wetland protected areas

Creating a digital twin and polar digital space in Antarctica

A synchronized remote sensing monitoring approach in the Livingstone island region of Antarctica

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