scholarly journals Use of remote sensing data to study ice cover in the Dnipro Reservoirs

2020 ◽  
Vol 29 (1) ◽  
pp. 206-216
Author(s):  
Viktor I. Vyshnevskyi ◽  
Serhii A. Shevchuk
Keyword(s):  
Remote Sensing ◽  
Remote Sensing Data ◽  
Ice Cover ◽  
Typical Feature ◽  
Industrial Enterprises ◽  
North East ◽  
The North ◽  
South West ◽  
Ice Regime ◽  
The Impact

The information on the use of remote sensing data when studying the ice cover of the Dnipro Reservoirs is given. The main source of data was the images obtained by the satellites Sentinel-2, Landsat, Aqua and Terra. In addition, the observation data from the hydrological and meteorological stations were used. The combination of these data enabled to study the patterns of ice regime in the Dnipro Reservoirs, to specify some features that cannot be determined by regular monitoring. A typical feature of the ice cover of all reservoirs of the Dnipro Cascade, besides the Kyivske one, is the impact of hydropower plants (HPP) located upstream. The runoff of the rivers flowing into the Kyivske Reservoir significantly influences its ice cover. This is especially relates to the period of spring flood. Besides the Dnipro and the Pripyat Rivers, relatively small the Teteriv and the Irpin Rivers flowing from the south-west to the north-east have a rather significant effect on the ice cover of this reservoir. The distribution of ice cover in the Kanivske Reservoir, compared to the Kanivske one, is significantly less. In addition to more southern location and warmer climate, the city of Kyiv also influences the ice cover on it, namely due to the discharge of wastewater from several industrial enterprises, Kyivska TPP-5 and Bortnitska Station of Aeration are ones of them. The impact of Trypilska TPP, which located downstream, is also significant. The longest duration of ice cover in the Kanivske Reservoir is observed in its south-eastern part. A point of interest about the Kremenchuts’ke Reservoir is the fact that the ice cover in it remains for the longest period compared to the other reservoirs. The largest duration of ice cover in this reservoir is observed in the Sulska Bay. The typical feature of the Kamianske Reservoir is the accumulation of ice in its narrow parts. Within the Dniprovske Reservoir, the longest freezing period is observed in the Samara Bay. Besides the operation of hydropower station, the industrial enterprises of Kamianske town and Dnipro city have a great effect on the upper part of this reservoir. There are significant differences in the ice regime of the different parts of the Kakhovske Reservoir, which extends from the north-east to the south-west. The distribution of ice in its shallow north-eastern part is usually much larger than in narrower south-western part.

scholarly journals Geothermal potential mapping of Northeast Morocco (Bekrane-Ahfir) using remote sensing data and GIS

2021 ◽  
Vol 234 ◽  
pp. 00093
Author(s):  
Intissar El Morabit ◽  
Soufiane Maimouni ◽  
Ahmed Fekri
Keyword(s):  
Remote Sensing ◽  
Active Sites ◽  
Remote Sensing Data ◽  
Landsat 8 ◽  
North East ◽  
The North ◽  
Hydrothermal Springs ◽  
Geothermal Potential ◽  
Geothermal Activity ◽  
Potential Mapping

Geothermal energy is part of the renewable energy mix. It is used for heating, air conditioning and sometimes even for the production of electricity. Prospecting for such a resource proves to be a difficult and capital-intensive task. To overcome this constraint, we have used remote sensing which is an adequate tool to guide the prospecting through the elaboration of hydrothermal resource potential maps at the level of zones that present a favorable potential for exploitation (hyper-tectonized sites, volcanic sites, faulted sites, sites with hot geological formations, seismic zones...). The objective of this work is to carry out a study on the North-East of Morocco (Berkane Province), in order to identify favorable sites for geothermal exploitation such as geologically and hydrogeologically active sites. The methodology adopted consists in processing the images of the OLI (Operational Land Imager) and TIRS (Thermal Infrared Sensor) sensors of the Landsat-8 satellite in order to extract spectral indices (Clay mineral Index and Ferrous mineral Index,) detecting a geothermal activity and the surface temperature map (LST) using muticriteria analysis method (MCA). ) in the north-eastern part of Morocco. The results obtained show an almost perfect concordance of the distribution of the above-mentioned indices, with the map of lineaments which are considered as heat drains from the depth to the surface. Moreover, a correct correlation was established during the validation of these results with the map of the inventory of hydrothermal springs identified in the study area.

Comparison of remote sensing-based indices for ash vitality detection in North-East Germany

2020 ◽  
Author(s):  
Michael Förster ◽  
Anne Clasen ◽  
Kai Jütte ◽  
Veronika Döpper ◽  
Birgit Kleinschmit
Keyword(s):  
Remote Sensing ◽  
East Germany ◽  
Remote Sensing Data ◽  
North East ◽  
The North ◽  
Ash Trees ◽  
One Year ◽  
Regional Forest ◽  
Structural Indices ◽  
Higher Sensitivity

<p>The north-East of Europe is affected by the ash (Fraxinus excelsior) dieback caused by the fungal pathogen Hymenoscyphus pseudoalbidus. A great variety of studies utilize remote sensing data and subsequently derived spectral indices to estimate the magnitude and spatial distribution of the damage for different tree types. </p><p>Often, structural indices, such as the NDVI are applied to detect already affected tree (sometimes even for early detection). However, there are differences in the suitability of an index. While a structural index, might have advantages when the canopy is not closed, pigment-based indices can show more variation within a full crown coverage forest. Therefore, the season of data acquisition might define the preferred index-selection. The same accounts not just for seasonal but for inter-annual changes, too. Here, the pigment indices show a higher sensitivity towards changes due to damages than structural indices.</p><p>To show these differences, the presented study is evaluating a variety of indices derived by hyperspectral imagery for affected ash trees in north-east Germany. This includes images from different phenological stages within one year (2015) and a comparison between 2011, 2015, and 2019 because the decline increased severely within this timespan for the observed trees. The indices were compared with tree damage estimations from the regional forest administration. </p><p>Preliminary results show a better relation for structural indices in autumn, but higher relation for pigment-based indices in spring and summer, once the crown is closed. A higher sensitivity to changes between 2011 and 2019 can be shown for pigment-based indices.</p>

scholarly journals Perspectives of the development of complex interdisciplinary hydrological and geocryological research in the North-East of Russia

2021 ◽  
Vol 66 (1) ◽  
Author(s):  
Olga M. Makarieva ◽  
◽  
Nataliia V. Nesterova ◽  
Andrey A. Ostashov ◽  
Anastasia A. Zemlyanskova ◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Remote Sensing ◽  
Water Balance ◽  
River Runoff ◽  
Remote Sensing Data ◽  
Field Research ◽  
River Basins ◽  
Soviet Period ◽  
North East ◽  
The North

Climate warming and anthropogenic impact causes transformation of geocryological conditions in the river basins of the North-East of Russia. Changes in the thickness of the active layer, configuration of taliks, types of landscapes and other factors lead to transformation of water exchange processes between surface and groundwater runoff. This is manifested in the seasonal redistribution of the components of the water balance, accelerated melting of aufeis, change in the ratio of waters of different genesis in the structure of river runoff. As a result, natural and anthropogenic risks that affect the safe and efficient development of infrastructure and socio-economic processes are increasing. At the same time the system of observations developed in the Soviet period has been practically destroyed in the region. This paper offers a vision of organizing complex multidisciplinary research to assess and project the changes in the conditions of underground and surface water interaction in natural and disturbed river basins of the cryolithozone of the North-East of Russia, including for solving applied problems, based on permafrost, hydrology, hydrogeology, landscape science and geophysics with applications of remote sensing and field research integrated through mathematical modeling methods. To achieve the goal, the identification of natural and disturbed landscapes using remote sensing data, and key areas for detailed research will be selected. Geophysical and drilling works will be carried out within the sites to establish permafrost-hydrogeological conditions, monitoring stations will be equipped to determine hydrogeological, hydrometeorological and geocryological characteristics, including sampling for isotopic and hydrogeochemical studies. As the main key sites, it is proposed to use the area of ​​the Kolyma water-balance station and the site on Anmangynda aufeis, for which there are long-term observation series in the 20th century. Field data will become the basis for improving the mathematical model of runoff formation, considering the relationship between groundwater and river runoff in the conditions of permafrost. Mathematical modeling will make it possible to quantitatively analyze the water balance of rivers considering various factors and project water availability both for specific industrial facilities and for the region as a whole.

A Major Ecosystem Shift in Coastal East African Waters during the 1997/98 Super El Niño as Detected Using Remote Sensing Data

2021 ◽  
Author(s):  
Zoe Jacobs ◽  
Fatma Jebri ◽  
Meric Srokosz ◽  
Dionysios Raitsos ◽  
Stuart Painter ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Indian Ocean ◽  
Remote Sensing Data ◽  
Temporary Increase ◽  
Wind Stress Curl ◽  
Indian Ocean Dipole Event ◽  
The North ◽  
Positive Indian Ocean Dipole ◽  
Central Indian Ocean ◽  
The Impact

<p>Under the impact of natural and anthropogenic climate variability, upwelling systems are known to change their properties leading to associated regime shifts in marine ecosystems. These often impact commercial fisheries and societies dependent on them. In a region where in situ hydrographic and biological marine data are scarce, this study uses a combination of remote sensing and ocean modelling to show how a stable seasonal upwelling off the Kenyan coast shifted into the territorial waters of neighboring Tanzania under the influence of the unique 1997/ 98 El Niño and positive Indian Ocean Dipole event. The formation of an anticyclonic gyre adjacent to the Kenyan/ Tanzanian coast led to a reorganization of the surface currents and caused the southward migration of the Somali–Zanzibar confluence zone and is attributed to anomalous wind stress curl over the central Indian Ocean. This caused the lowest observed chlorophyll-a over the North Kenya banks (Kenya), while it reached its historical maximum off Dar Es Salaam (Tanzanian waters). We demonstrate that this situation is specific to the 1997/ 98 El Niño when compared with other the super El-Niño events of 1972,73, 1982–83 and 2015–16. Despite the lack of available fishery data in the region, the local ecosystem changes that the shift of this upwelling may have caused are discussed based on the literature. The likely negative impacts on local fish stocks in Kenya, affecting fishers’ livelihoods and food security, and the temporary increase in pelagic fishery species’ productivity in Tanzania are highlighted. Finally, we discuss how satellite observations may assist fisheries management bodies to anticipate low productivity periods, and mitigate their potentially negative economic impacts.</p>

scholarly journals USING REMOTE SENSING AND GIS TO IDENTIFY TREND OF EXPANSION OF URBAN AREA IN HOCHIMINH CITY

2010 ◽  
Vol 13 (1) ◽  
pp. 14-25
Author(s):  
Viet Bach Pham
Keyword(s):  
Remote Sensing ◽  
Spectral Analysis ◽  
Urban Area ◽  
Spectral Response ◽  
Remote Sensing And Gis ◽  
Landsat Data ◽  
Spatial Expansion ◽  
North East ◽  
The North ◽  
South West

Studying on the trend of spatial expansion of urban in Hohiminh city, which used remote sensing and spatial analysis of GIS, has revealed changes of spatial urban over times.. Analysis of spectral response for main land cover types had been done on Landsat data from 1975 to 2005 in order to discriminate urban type with the others. Based on this spectral analysis, the expansion of urban area over times has been identified. Spatial statistics analysis was applied to estimate trends of urban area of Hochiminh city. Tthe results showed a wide spreading out from 1975 to 2008, the urban area has been extended two times in radius and three times in area. The trends of spatial expansion is anisotropic. There is a spatial expansion trend in the north east-south west axis.

scholarly journals INDEKS KUALITAS LINGKUNGAN (IKL) DI WILAYAH PERAIRAN NATUNA TERKAIT DENGAN AKTIVITAS INDUSTRI MIGAS

2016 ◽  
Vol 12 (2) ◽  
pp. 93
Author(s):  
Rahayu Kusuma Risdianto ◽  
Undang Hernawan
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Environmental Quality ◽  
Quality Index ◽  
Remote Sensing Data ◽  
Analysis Data ◽  
Quality Parameters ◽  
North East ◽  
The North ◽  
Industry Area

Indeks Kualitas Lingkungan (IKL) dapat digunakan untuk memantau kondisi lingkungan. Analisis Indeks Kualitas Lingkungan (IKL) dilakukan di kawasan industri migas di perairan Laut Natuna. Studi ini menggunakan data penginderaan jauh dan analisa sembilan parameter kualitas air dari 15 titik lokasi untuk menyusun algoritma kualitas air. Hasil dari studi ini menunjukkan distribusi IKL tergolong kriteria baik (70-91) dan sangat baik (91-100). Nilai IKL baik berada di bagian Utara (U) sampai Timur Laut (TL) dan Timur (T) sampai Selatan (S) dan terlihat dominan di bagian Selatan (S) sampai Utara (U). Nilai IKL sedang berada di bagian Barat Daya (BD) sampai Barat (B). Distribusi IKL sangat baik dominan berada di bagian Utara (U) sampai Timur Laut (TL), Timur (T) sampai Selatan (S) dan terlihat dominan di bagian Timur Laut (TL) sampai Timur (T). Kata kunci: IKL, penginderaan jauh, MODIS, kualitas Air, perairan Natuna. Environmental Quality Index (EQI) can be used for monitoring of environmental condition. Analysis of Environmental Quality Index (EQI) in petroleum and gas industry area had been done at Natuna waters. This study was based on remote sensing data and analysis data of nine water quality parameters from fifteen sampling sites to arrange water quality algorithm. The result shows that the distribution of EQI is within good (70-91) to very good (91-100) criteria. The good value of EQI is distributed from north (N) to north east (NE) and east (E) until south (S) that is dominated at the soutern to northern parts. The medium value of EQI is in southwest to west parts. The very good EQI is dominated at the north (N) until North East (NE), East (E) to southern parts that is dominated at the northeast to eastern parts. Keywords: EQI, Remote Sensing, MODIS, Water Quality.

scholarly journals Analysing the Impact of Climate Change on Hydrological Ecosystem Services in Laguna del Sauce (Uruguay) Using the SWAT Model and Remote Sensing Data

2021 ◽  
Vol 13 (10) ◽  
pp. 2014
Author(s):  
Celina Aznarez ◽  
Patricia Jimeno-Sáez ◽  
Adrián López-Ballesteros ◽  
Juan Pablo Pacheco ◽  
Javier Senent-Aparicio
Keyword(s):  
Climate Change ◽  
Remote Sensing ◽  
Ecosystem Services ◽  
Water Resources ◽  
Swat Model ◽  
Remote Sensing Data ◽  
Erosion Control ◽  
Sensing Data ◽  
Extreme Precipitation Events ◽  
The Impact

Assessing how climate change will affect hydrological ecosystem services (HES) provision is necessary for long-term planning and requires local comprehensive climate information. In this study, we used SWAT to evaluate the impacts on four HES, natural hazard protection, erosion control regulation and water supply and flow regulation for the Laguna del Sauce catchment in Uruguay. We used downscaled CMIP-5 global climate models for Representative Concentration Pathways (RCP) 2.6, 4.5 and 8.5 projections. We calibrated and validated our SWAT model for the periods 2005–2009 and 2010–2013 based on remote sensed ET data. Monthly NSE and R2 values for calibration and validation were 0.74, 0.64 and 0.79, 0.84, respectively. Our results suggest that climate change will likely negatively affect the water resources of the Laguna del Sauce catchment, especially in the RCP 8.5 scenario. In all RCP scenarios, the catchment is likely to experience a wetting trend, higher temperatures, seasonality shifts and an increase in extreme precipitation events, particularly in frequency and magnitude. This will likely affect water quality provision through runoff and sediment yield inputs, reducing the erosion control HES and likely aggravating eutrophication. Although the amount of water will increase, changes to the hydrological cycle might jeopardize the stability of freshwater supplies and HES on which many people in the south-eastern region of Uruguay depend. Despite streamflow monitoring capacities need to be enhanced to reduce the uncertainty of model results, our findings provide valuable insights for water resources planning in the study area. Hence, water management and monitoring capacities need to be enhanced to reduce the potential negative climate change impacts on HES. The methodological approach presented here, based on satellite ET data can be replicated and adapted to any other place in the world since we employed open-access software and remote sensing data for all the phases of hydrological modelling and HES provision assessment.

The Metamorphosed Limestones and Associated Contaminated Igneous Rocks of the Carlingford District, Co. Louth

1932 ◽  
Vol 69 (5) ◽  
pp. 209-233 ◽  
Author(s):  
G. D. Osborne
Keyword(s):  
Igneous Rocks ◽  
The South ◽  
Ordnance Survey ◽  
Igneous Complex ◽  
North East ◽  
The North ◽  
South West ◽  
Carboniferous Limestone ◽  
Contamination Effects

THE Carlingford-Barnave district falls within the boundaries of Sheet 71 of the Ordnance Survey of Ireland, and forms part of a broad promontory lying between Carlingford Lough on the north-east and Dundalk Bay on the south-west. The greater part of this promontory is made up of an igneous complex of Tertiary age which has invaded the Silurian slates and quartzites and the Carboniferous Limestone Series. This complex has not yet been investigated in detail, but for the purposes of the present paper certain references to it are necessary, and these are made below. The prevalence of hybrid-relations and contamination-effects between the basic and acid igneous rocks of the region is a very marked feature, and because of this it has been difficult at times to decide which types have been responsible for the various stages of the metamorphism.

scholarly journals Capacity Development for Use of Remote Sensing for REDD+ MRV Using Online and Offline Activities: Impacts and Lessons Learned

2021 ◽  
Vol 13 (11) ◽  
pp. 2172
Author(s):  
Sarah Carter ◽  
Martin Herold ◽  
Inge Jonckheere ◽  
Andres Espejo ◽  
Carly Green ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Forest Cover ◽  
Hybrid Approach ◽  
Remote Sensing Data ◽  
Lessons Learned ◽  
Multiple Partners ◽  
Large Audience ◽  
Forest Cover Changes ◽  
The Impact ◽  
And Training

Four workshops and a webinar series were organized, with the aim of building capacity in countries to use Earth Observation Remote Sensing data to monitor forest cover changes and measure emissions reductions for REDD+ results-based payments. Webinars and workshops covered a variety of relevant tools and methods. The initiative was collaboratively organised by a number of Global Forest Observations Initiative (GFOI) partner institutions with funding from the World Bank’s Forest Carbon Partnership Facility (FCPF). The collaborative approach with multiple partners proved to be efficient and was able to reach a large audience, particularly in the case of the webinars. However, the impact in terms of use of tools and training of others after the events was higher for the workshops. In addition, engagement with experts was higher from workshop participants. In terms of efficiency, webinars are significantly cheaper to organize. A hybrid approach might be considered for future initiatives; and, this study of the effectiveness of both in-person and online capacity building can guide the development of future initiatives, something that is particularly pertinent in a COVID-19 era.

Part VI. The Cyclopean Terrace Building and the Deposit of Pottery beneath It

1954 ◽  
Vol 49 ◽  
pp. 267-291
Author(s):  
Elizabeth B. Wace
Keyword(s):  
Contour Line ◽  
The South ◽  
Main Road ◽  
North West ◽  
North East ◽  
The North ◽  
South West

The Cyclopean Terrace Building lies to the north-west of the Lion Gate on the northern end of the Panagia Ridge and faces almost due west across the valley of the Kephissos and modern main road from Corinth to Argos. It lies just below the 200 m. contour line, and one terrace below the houses excavated in 1950–51 by Dr. Papadimitriou and Mr. Petsas to the east at the same end of the ridge. The area contains a complex of buildings, both successive and contemporary, and in view of the discovery of structures both to the south-west and, by the Greek Archaeological Service, to the north-east it is likely that this whole slope was covered by a portion of the outer town of Mycenae. This report will deal only with the structure to which the name Cyclopean Terrace Building was originally given, the so-called ‘North Megaron’, supported by the heavy main terrace wall.The excavation of this structure was begun in 1923. The main terrace wall was cleared and two L.H. IIIC burials discovered in the top of the fill in the south room. In 1950 it was decided to attempt to clear this building entirely in an endeavour to find out its date and purpose. The clearing was not, however, substantially completed until the close of the 1953 excavation season, and this report presents the available evidence for the date as determined by the pottery found beneath the building; the purpose is still a matter for study, though various tentative conclusions can be put forward.

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