Fuel type mapping using object-based image analysis of DMC and Landsat-8 OLI imagery     

A. Stefanidou  E. Dragozi  D. Stavrakoudis  I. Z. Gitas 《国际地球制图》2018,33(10):1064-1083

Efficient forest fire management requires precise and up-to-date knowledge regarding the composition and spatial distribution of forest fuels at various spatial and temporal scales. Fuel-type maps are essential for effective fire prevention strategies planning, as well as the alleviation of the environmental impacts of potential wildfire events. The aim of this study was to assess and compare the potential of Disaster Monitoring Constellation and Landsat-8 OLI satellite images (Operational Land Imager), combined with Object-Based Image Analysis (GEOBIA), in operational mapping of the Mediterranean fuel types at a regional scale. The results showcase that although the images of both sensors can be used with GEOBIA analysis for the generation of accurate fuel-type maps, only the OLI images can be considered as applicable for regional mapping of the Mediterranean fuel types on an operational basis.  相似文献   

‘Filament’ marker beds in the Karababa-A Member (Turonian) of the Arabian platform,SE Turkey: Palaeo-environmental significance,stratigraphy and correlation potential     

O. Mülayim  I.O. Yilmaz  B. Sari  B. Ferré 《Proceedings of the Geologists' Association. Geologists' Association》2021,132(2):188-198

A ‘filament’ event bed/level corresponds to the occurrence of thin elongate calcitic, shells, or plates of pelagic, bivalve or crinoidal, origin, within pelagic, laminated and organic-matter rich limestones. These organic-rich limestones had been generally deposited under hypoxic/anoxic conditions in an outer-ramp environment. These thin elongate, bivalve shells, or crinoidal plates, are found broken in small pieces, disintegrated, or simply preserved parallel to bedding as almost complete specimens. Such ‘filament’ beds were spotted in SE Turkey in deposits, namely the Karababa-A Member, around the Cenomanian-Turonian boundary (C/TB) and above. On a global scale, these filament event beds illustrate sea-level rise related to eustacy and/or climatic change. The abundance of filaments close to the C/TB is a biological marker of high organic productivity resulting from a climatic change to warmer conditions. The prevailing higher sea-level conditions were then favourable to the accumulation and preservation of organic-rich facies, characteristic of the Oceanic Anoxic Event 2 (OAE2). Using both biostratigraphic and carbon isotopic data, those deposits were dated from the latest Cenomanian-Turonian age. ‘Filament’ event beds were recorded in the same order, except for some small differences. A good number of these bio-events are global. Consequently, on a global scale, they are susceptible to constrain the C/TB, especially the base of the Turonian stage, with a significant degree of confidence.  相似文献   

Trend Analysis of Polynomial Surfaces and Surface Dynamics (TAPS‒SDs): A Paradigm from (MMT‒NPHMZ) in the Northwestern Himalayas,Pakistan     

Kaukab  I. S.  Batool  S.  Mahmood  S. A. 《Geotectonics》2021,55(2):273-292

Geotectonics - Generation and interpretation of geomorphometric maps through remote sensing and GIS techniques are significant platforms for the investigations of neotectonics. This investigation...  相似文献   

Geological Conditions of the Formation and Dissociation of Gas Hydrates in the Sea of Okhotsk: Tectonic and Genetic Aspects     

Obzhirov  A. I.  Sokolova  N. L.  Telegin  Yu. A. 《Lithology and Mineral Resources》2021,56(4):333-342

Lithology and Mineral Resources - The paper is dedicated to gas hydrate fields and active underwater gas seeps found in the Sea of Okhotsk. The study of geological conditions of the generation and...  相似文献   

Relationship between Strong Earthquakes and Activation of Deep Faults in Central Asia (Uzbekistan): Numerical Simulation of Stress Field Variations     

Atabekov  I. U.  Artikov  T. U.  Ibragimov  R. S.  Ibragimova  T. L.  Mirzaev  M. A. 《Geotectonics》2021,55(3):377-392

Geotectonics - The results of analyzing the data on strong М ≥ 5 earthquakes in Central Asia for 1901–2013 are presented. A statistical method for studying the influence of the...  相似文献   

Neotectonics and the Upper Mantle Structure of Central Asia     

Trifonov  V. G.  Sokolov  S. Yu.  Bachmanov  D. M.  Sokolov  S. A.  Trikhunkov  Ya. I. 《Geotectonics》2021,55(3):334-360

Geotectonics - Studies carried out by the authors show that the uplift of Central Asia situated between the eastern Alpine–Himalayan and western Altai–Stanovoy orogenic belts formed in...  相似文献   

Tectonic Position of the South Anyui Suture     

Sokolov  S. D.  Tuchkova  M. I.  Ledneva  G. V.  Luchitskaya  M. V.  Ganelin  A. V.  Vatrushkina  E. V.  Moiseev  A. V. 《Geotectonics》2021,55(5):697-716

Geotectonics - The South Anyui Fold System was formed at the end of the Early Cretaceous at the site of a closed oceanic basin as a result of the collision of the Chukotka microcontinent with the...  相似文献   

Statistical forecast of the marine surge     

Quintana  Gonzalo Iñaki  Tandeo  Pierre  Drumetz  Lucas  Leballeur  Laurent  Pavec  Marc 《Natural Hazards》2021,108(3):2905-2917

Natural Hazards - This paper studies different machine learning methods for solving the regression problem of estimating the marine surge value given meteorological data. The marine surge is...  相似文献   

Detailing the impact of the Storegga Tsunami at Montrose,Scotland     

Mark D. Bateman  Tim C. Kinnaird  Jon Hill  Robert A. Ashurst  Jenna Mohan  Rebecca B. I. Bateman  Ruth Robinson 《Boreas: An International Journal of Quaternary Research》2021,50(4):1059-1078

The Storegga tsunami, dated in Norway to 8150±30 cal. years BP, hit many countries bordering the North Sea. Run-ups of >30 m occurred and 1000s of kilometres of coast were impacted. Whilst recent modelling successfully generated a tsunami wave train, the wave heights and velocities, it under-estimated wave run-ups. Work presented here used luminescence to directly date the Storegga tsunami deposits at the type site of Maryton, Aberdeenshire in Scotland. It also undertook sedimentological characterization to establish provenance, and number and relative power of the tsunami waves. Tsunami model refinement used this to better understand coastal inundation. Luminescence ages successfully date Scottish Storegga tsunami deposits to 8100±250 years. Sedimentology showed that at Montrose, three tsunami waves came from the northeast or east, over-ran pre-existing marine sands and weathered igneous bedrock on the coastal plain. Incorporation of an inundation model predicts well a tsunami impacting on the Montrose Basin in terms of replicate direction and sediment size. However, under-estimation of run-up persisted requiring further consideration of palaeotopography and palaeo-near-shore bathymetry for it to agree with sedimentary evidence. Future model evolution incorporating this will be better able to inform on the hazard risk and potential impacts for future high-magnitude submarine generated tsunami events.  相似文献   

The Nature of Platinoid Minerals from Gold Placers of Southern Sikhote-Alin (Primorye)     

Ivanov  V. V.  Khanchuk  A. I.  Kolesova  L. G. 《Doklady Earth Sciences》2021,498(2):482-486

Doklady Earth Sciences - Gold placers of two streams that drain Permian dislocated terrigenous deposits overlying Cambrian metagabbroids and metadiorites in southern Sikhote-Alin have been studied....  相似文献