Monitoring of surface water bodies by Sentinel and open data

Spasova, Temenuzhka; Dancheva, Adlin; Ivanova, Iva; Borisova, Denitsa; Stankova, Nataliya

doi:10.1117/12.2600282

Cited by 4 publications

(5 citation statements)

References 3 publications

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“…The drying together with the presence of active tourist season in July leads to the formation of heat islands, which can also be defined in places as urban heat islands (UHI), since they cover populated areas.  LST confirms the same trend and is an indicator that can validate other climate change data 31,32 .  The areas around Cape Kaliakra are a protected area, but despite this, significant changes in the vegetation and in the water were observed in 2019.…”

Section: Resultssupporting

confidence: 72%

“… NDVI values below + 0.3 indicate low vegetation or almost no new vegetation during the growing season, which is an indicator and for the severe drought not only in the region of Dobrich district, but also for the entire North -East Planning region.The drying together with the presence of active tourist season in July leads to the formation of heat islands, which can also be defined in places as urban heat islands (UHI), since they cover populated areas.  LST confirms the same trend and is an indicator that can validate other climate change data31,32 .  The areas around Cape Kaliakra are a protected area, but despite this, significant changes in the vegetation and in the water were observed in 2019.…”

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confidence: 71%

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Assessment of heat islands and renewable energy sources in the north - east planning region of Bulgaria by remote sensing

Spasova,

Ivanova,

Avetisyan

et al. 2024

SPIE Future Sensing Technologies 2024

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Surface and ground air temperatures are one of the variables that best distinguish and characterize the specific climate in urbanized spaces. Over the years, research has shown that urbanized spaces have experienced persistently higher temperatures, which is defined as the urban heat island effect (Urban Heat Island-UHI). Wind turbines and solar panels are two of the main types of renewable energy sources used in Bulgaria. The presence of too many different facilities related to renewable energy sources often has an impact, but sometimes this impact can be negative for specific territories even if they are not highly urbanized, such as the selected territory in Western Pontic steppes, North-Еast Planning Region (BG33). The study covers examples from the planning region defined in the Law on Regional Development of the Republic of Bulgaria under Art. 11 1 , which will support the Integrated Territorial Strategy for the Development of NUTS 2 planning district. These are territories whose selection is determined by the fact that they have extremely high economic and ecological importance for monitoring the normal course of natural processes, disasters and consequences of sudden changes. The aim of the research is to create a methodology for monitoring through a complex approach, to be used by experts and non-experts, in order to make decisions for the management of the territories occupied with renewable energy sources. Different indicators and indices from the optical range, such as Normalized Differential Greenness Index (NDGI), Tasseled cap transformation (TCT), Normalized Difference Vegetation Index (NDVI) and Land surface temperature (LST), were used for the different groups of objects. The spectral reflectance characteristics of natural and anthropogenic objects have been used to classify temperatures. Open data 2,3 , data from the National Spatial Data Portal (Inspire) 4 , Orthophoto and aircraft images from 100 years ago were used for the needs of the methodology.

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Section: Resultssupporting

confidence: 72%

supporting

confidence: 71%

Assessment of heat islands and renewable energy sources in the north - east planning region of Bulgaria by remote sensing

Spasova,

Ivanova,

Avetisyan

et al. 2024

SPIE Future Sensing Technologies 2024

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“…For the disaster assessment [7,9,11,13,15,17,19] in the area of the Türkiye -Syria border Sentinel-2 images with close to zero percentage cloud coverage was selected. Two products covered plate T36SYF in accordance of European Space Agency (ESA) naming nomenclature from dates 2022.10.27 and 2023.03.01 was used for the survey presentation in the paper.…”

Section: Satellite Datamentioning

confidence: 99%

Change detection techniques for urban area disaster assessment using high resolution satellite data

Tsvetkov

2023

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

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Unfortunately, the year 2023 began with a devastating earthquakes unprecedented in recent years, spreading over the territories of two neighboring countries (Turkey and Syria) located on the same tectonic plate. On the night of February 6, 2023, Turkey and Syria were hit by a powerful 7.8 magnitude earthquake. The earthquake was one of the strongest in the region in more than a century. Even more devastation was caused by aftershocks that hit both countries hours later. A few days later, weaker earthquakes were reported in two other countries (Romania and Croatia) located on different with respect to first one, but neighboring, tectonic plate. This paper represents an approach for using change detection techniques based on free access high resolution Earth observation satellite data (Sentinel, Landsat) for assessment of the consequences caused by earthquakes in an urban area. Known change detection techniques have been investigated such as: image differencing, image rationing, change detection based on indexes calculation and comparison, etc.As a result, a comparative analysis of the investigated change detection techniques with respect to an urban area adequacy is presented.

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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%

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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Monitoring of surface water bodies by Sentinel and open data

Cited by 4 publications

References 3 publications

Assessment of heat islands and renewable energy sources in the north - east planning region of Bulgaria by remote sensing

Assessment of heat islands and renewable energy sources in the north - east planning region of Bulgaria by remote sensing

Change detection techniques for urban area disaster assessment using high resolution satellite data

Creating a digital twin and polar digital space in Antarctica

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