<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">gesj</journal-id><journal-title-group><journal-title xml:lang="en">GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY</journal-title><trans-title-group xml:lang="ru"><trans-title>GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2071-9388</issn><issn pub-type="epub">2542-1565</issn><publisher><publisher-name>Russian Geographical Society</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24057/2071-9388-2021-006</article-id><article-id custom-type="elpub" pub-id-type="custom">gesj-2327</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RESEARCH PAPER</subject></subj-group></article-categories><title-group><article-title>Monitoring of Fragile Ecosystems with Spectral Indices Using Sentinel-2A MSI Data in Shahdagh National Park</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Jabrayilov</surname><given-names>Emil A.</given-names></name></name-alternatives><bio xml:lang="en"><p>115 H.Javid ave, Baku, AZ1143</p></bio><email xlink:type="simple">jabrayilov@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Institute of Geography Azerbaijan National Academy of Sciences</institution><country>Azerbaijan</country></aff><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>28</day><month>03</month><year>2022</year></pub-date><volume>15</volume><issue>1</issue><fpage>70</fpage><lpage>77</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Jabrayilov E.A., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Jabrayilov E.A.</copyright-holder><copyright-holder xml:lang="en">Jabrayilov E.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://ges.rgo.ru/jour/article/view/2327">https://ges.rgo.ru/jour/article/view/2327</self-uri><abstract><p>Studying ecosystems using remote sensing technologies is very relevant since it checks the accuracy of the results of modern research. This study aims to monitor environmental changes in ecosystems of the Shahdagh National Park and its surrounding areas in Azerbaijan using Sentinel 2A MSI data. The study aimed to examine and monitor changes in vegetation, water resources, and drought conditions of the study area in recent years. For analyzing and observing these ecosystems Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), and Normalized Difference Drought Index (NDDI) were calculated using multi-band methods. Obtained indices were compared and changes were investigated analyzing satellite-derived methods. For proper monitoring and assessment of relevant ecosystems, there had been determined 3,825 fishnet points for the study area. This made it possible to compare and coordinate the results of the indices more accurately. After linking fishnet points to raster indices, classification had been made for measuring ecosystems indicators. Vegetation assessments revealed a partial expansion of sparse vegetation or bare rocks, river valleys, as well as nival, subnival, and partial subalpine meadows from 15.1% to 18.1%. Another growth indicator is a significant increase of dense forest ecosystems from 2.3% to 9.2%. According to the results decreases are observed in sparse forests, arable lands, pastures, and shrubs, which are more sensitive to anthropogenic factors. Monitoring of the indices shows that low-humidity areas increase as droughts intensify, especially in plain areas. Finally, the study revealed that the introduction of a specially protected regime within the national park makes ecosystems more sustainable.</p><p> </p></abstract><kwd-group xml:lang="en"><kwd>environmental monitoring</kwd><kwd>NDVI</kwd><kwd>NDWI</kwd><kwd>NDDI</kwd><kwd>Shahdagh National Park</kwd><kwd>ecosystem</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The author would like to acknowledge to European Union’s Copernicus Earth Observation Programme for accessing and using Sentinel 2 data and express his sincere gratitude to anonymous reviewers for the necessary recommendations and valuable suggestions</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Ali M.I., Dirawan G.D., Hasim A.H., &amp; Abidin M.R. (2019). Detection of Changes in Surface Water Bodies Urban Area with NDWI and MNDWI Methods. International Journal on Advanced Science Engineering Informatioan Technology, 9(3), 946–951. DOI: 10.18517/ijaseit.9.3.8692.</mixed-citation><mixed-citation xml:lang="en">Ali M.I., Dirawan G.D., Hasim A.H., &amp; Abidin M.R. (2019). Detection of Changes in Surface Water Bodies Urban Area with NDWI and MNDWI Methods. International Journal on Advanced Science Engineering Informatioan Technology, 9(3), 946–951. DOI: 10.18517/ijaseit.9.3.8692.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Belgiu M., &amp; Csillik O. (2018). Sentinel-2 cropland mapping using pixel-based and object-based time-weighted dynamic time warping analysis. Remote sensing of environment, 204, 509–523. DOI: 10.1016/j.rse.2017.10.005.</mixed-citation><mixed-citation xml:lang="en">Belgiu M., &amp; Csillik O. (2018). Sentinel-2 cropland mapping using pixel-based and object-based time-weighted dynamic time warping analysis. Remote sensing of environment, 204, 509–523. DOI: 10.1016/j.rse.2017.10.005.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Brundtland G.H. (1987). Report of the world commission on environment and development: our common future (1987). World Commission on Environment and Development, UN, Oxford; New York.</mixed-citation><mixed-citation xml:lang="en">Brundtland G.H. (1987). Report of the world commission on environment and development: our common future (1987). World Commission on Environment and Development, UN, Oxford; New York.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Carlson T.N., Ripley D.A. (1997) On the relation between NDVI, fractional vegetation cover, and leaf area index. Remote Sensing of Environment. 62(3), 241–252. DOI: 10.1016/S0034-4257(97)00104-1.</mixed-citation><mixed-citation xml:lang="en">Carlson T.N., Ripley D.A. (1997) On the relation between NDVI, fractional vegetation cover, and leaf area index. Remote Sensing of Environment. 62(3), 241–252. DOI: 10.1016/S0034-4257(97)00104-1.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Chu T., &amp; Guo X. (2014). Remote sensing techniques in monitoring post-fire effects and patterns of forest recovery in boreal forest regions: A review. Remote Sensing, 6(1), 470–520. DOI: 10.3390/rs6010470.</mixed-citation><mixed-citation xml:lang="en">Chu T., &amp; Guo X. (2014). Remote sensing techniques in monitoring post-fire effects and patterns of forest recovery in boreal forest regions: A review. Remote Sensing, 6(1), 470–520. DOI: 10.3390/rs6010470.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Dataset: © JAXA/METI ALOS PALSAR L1.0 (2007). Accessed through NASA’s Alaska Satellite Facility Distributed Active Archive Center (accessed June 25, 2021), DOI:10.5067/J4JVCFDDPEW1.</mixed-citation><mixed-citation xml:lang="en">Dataset: © JAXA/METI ALOS PALSAR L1.0 (2007). Accessed through NASA’s Alaska Satellite Facility Distributed Active Archive Center (accessed June 25, 2021), DOI:10.5067/J4JVCFDDPEW1.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Dobri R.V., Sfîcă L., Amihăesei V.A., Apostol L., &amp; Țîmpu S. (2021). Drought Extent and Severity on Arable Lands in Romania Derived from Normalized Difference Drought Index (2001–2020). Remote Sensing, 13(8), 1478. DOI:10.3390/rs13081478.</mixed-citation><mixed-citation xml:lang="en">Dobri R.V., Sfîcă L., Amihăesei V.A., Apostol L., &amp; Țîmpu S. (2021). Drought Extent and Severity on Arable Lands in Romania Derived from Normalized Difference Drought Index (2001–2020). Remote Sensing, 13(8), 1478. DOI:10.3390/rs13081478.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Filipponi F. (2018). BAIS2: Burned area index for Sentinel-2. Proceedings, 2(7), 364; DOI:10.3390/ecrs-2-05177.</mixed-citation><mixed-citation xml:lang="en">Filipponi F. (2018). BAIS2: Burned area index for Sentinel-2. Proceedings, 2(7), 364; DOI:10.3390/ecrs-2-05177.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Giuliani C., Veisz A.C., Piccinno M., &amp; Recanatesi F. (2019). Estimating vulnerability of water body using Sentinel-2 images and environmental modelling: the study case of Bracciano Lake (Italy). European Journal of Remote Sensing, 52(s4), 64–73. DOI:10.1080/227972 54.2019.1689796.</mixed-citation><mixed-citation xml:lang="en">Giuliani C., Veisz A.C., Piccinno M., &amp; Recanatesi F. (2019). Estimating vulnerability of water body using Sentinel-2 images and environmental modelling: the study case of Bracciano Lake (Italy). European Journal of Remote Sensing, 52(s4), 64–73. DOI:10.1080/227972 54.2019.1689796.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Griffiths P., Kuemmerle T., Baumann M., Radeloff V.C., Abrudan I.V., Lieskovsky J., ... &amp; Hostert P. (2014). Forest disturbances, forest recovery, and changes in forest types across the Carpathian ecoregion from 1985 to 2010 based on Landsat image composites. Remote Sensing of Environment, 151, 72–88. DOI:10.1016/j.rse.2013.04.022.</mixed-citation><mixed-citation xml:lang="en">Griffiths P., Kuemmerle T., Baumann M., Radeloff V.C., Abrudan I.V., Lieskovsky J., ... &amp; Hostert P. (2014). Forest disturbances, forest recovery, and changes in forest types across the Carpathian ecoregion from 1985 to 2010 based on Landsat image composites. Remote Sensing of Environment, 151, 72–88. DOI:10.1016/j.rse.2013.04.022.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Gu Y., Brown J.F., Verdin J.P., Wardlow B.D. (2006) A five-year analysis of MODIS NDVI and NDWI for grassland drought assessment over the central Great Plains of the United States. Geophysical Research Letters 34(L06407):6, DOI: 10.1029/2006GL029127.</mixed-citation><mixed-citation xml:lang="en">Gu Y., Brown J.F., Verdin J.P., Wardlow B.D. (2006) A five-year analysis of MODIS NDVI and NDWI for grassland drought assessment over the central Great Plains of the United States. Geophysical Research Letters 34(L06407):6, DOI: 10.1029/2006GL029127.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Higginbottom T.P., &amp; Symeonakis E. (2020). Identifying Ecosystem Function Shifts in Africa Using Breakpoint Analysis of Long-Term NDVI and RUE Data. Remote Sensing, 12(11), 1894. DOI:10.3390/rs12111894.</mixed-citation><mixed-citation xml:lang="en">Higginbottom T.P., &amp; Symeonakis E. (2020). Identifying Ecosystem Function Shifts in Africa Using Breakpoint Analysis of Long-Term NDVI and RUE Data. Remote Sensing, 12(11), 1894. DOI:10.3390/rs12111894.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Hou, K., Li, X., Wang, J., et al., (2016). Evaluating ecological vulnerability using the GIS and Analytic Hierarchy Process (AHP) method in Yan’an, China. Polish J. Environ. Stud. 25 (2), 599–605.</mixed-citation><mixed-citation xml:lang="en">Hou, K., Li, X., Wang, J., et al., (2016). Evaluating ecological vulnerability using the GIS and Analytic Hierarchy Process (AHP) method in Yan’an, China. Polish J. Environ. Stud. 25 (2), 599–605.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Ismayilov M., Jabrayilov E. (2019) Protected Areas in Azerbaijan: Landscape-Ecological Diversity and Sustainability. Ankara Üniversitesi Çevrebilimleri Dergisi. 7(2): 31–42. [Google Scholar].</mixed-citation><mixed-citation xml:lang="en">Ismayilov M., Jabrayilov E. (2019) Protected Areas in Azerbaijan: Landscape-Ecological Diversity and Sustainability. Ankara Üniversitesi Çevrebilimleri Dergisi. 7(2): 31–42. [Google Scholar].</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Jabrayilov E.A. (2021) Ecological Network Model in Shahdagh National Park. Proceedings of Voronezh State University. Series: Geography. Geoecology, 2, pp. 61–69, DOI: 10.17308/geo.2021.2/3449.</mixed-citation><mixed-citation xml:lang="en">Jabrayilov E.A. (2021) Ecological Network Model in Shahdagh National Park. Proceedings of Voronezh State University. Series: Geography. Geoecology, 2, pp. 61–69, DOI: 10.17308/geo.2021.2/3449.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Jiang W., Ni Y., Pang Z., Li X., Ju H., He G., ... &amp; Qin X. (2021). An Effective Water Body Extraction Method with New Water Index for Sentinel-2 Imagery. Water, 13(12), 1647. DOI:10.3390/w13121647.</mixed-citation><mixed-citation xml:lang="en">Jiang W., Ni Y., Pang Z., Li X., Ju H., He G., ... &amp; Qin X. (2021). An Effective Water Body Extraction Method with New Water Index for Sentinel-2 Imagery. Water, 13(12), 1647. DOI:10.3390/w13121647.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Lange M., Dechant B., Rebmann C., Vohland M., Cuntz M., &amp; Doktor D. (2017). Validating MODIS and sentinel-2 NDVI products at a temperate deciduous forest site using two independent ground-based sensors. Sensors, 17(8), 1855. DOI:10.3390/s17081855.</mixed-citation><mixed-citation xml:lang="en">Lange M., Dechant B., Rebmann C., Vohland M., Cuntz M., &amp; Doktor D. (2017). Validating MODIS and sentinel-2 NDVI products at a temperate deciduous forest site using two independent ground-based sensors. Sensors, 17(8), 1855. DOI:10.3390/s17081855.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Li Y., Cao Z., Long H., Liu Y., &amp; Li W. (2017). Dynamic analysis of ecological environment combined with land cover and NDVI changes and implications for sustainable urban–rural development: the case of Mu Us Sandy Land, China. Journal of Cleaner Production, 142, 697–715, DOI:10.1016/j.jclepro.2016.09.011.</mixed-citation><mixed-citation xml:lang="en">Li Y., Cao Z., Long H., Liu Y., &amp; Li W. (2017). Dynamic analysis of ecological environment combined with land cover and NDVI changes and implications for sustainable urban–rural development: the case of Mu Us Sandy Land, China. Journal of Cleaner Production, 142, 697–715, DOI:10.1016/j.jclepro.2016.09.011.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Mammadov R.M., Hasanov M.S., Ismayilov M.C. (2020) Freshwater ecosystems of Azerbaijan: problems and expectations. Geography and Natural Resources, 2 (12), p. 16–22.</mixed-citation><mixed-citation xml:lang="en">Mammadov R.M., Hasanov M.S., Ismayilov M.C. (2020) Freshwater ecosystems of Azerbaijan: problems and expectations. Geography and Natural Resources, 2 (12), p. 16–22.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">McFeeters S.K. (1996) The use of the Normalized Difference Water Index (NDWI) in the delineation of open water features. Int. J. Remote Sens, 17, 1425–1432. DOI:10.1080/01431169608948714.</mixed-citation><mixed-citation xml:lang="en">McFeeters S.K. (1996) The use of the Normalized Difference Water Index (NDWI) in the delineation of open water features. Int. J. Remote Sens, 17, 1425–1432. DOI:10.1080/01431169608948714.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Nilsson C., Nilsson G., (1995) The Fragility of Ecosystems: A Review. Journal of Applied Ecology 32(4):677–692, DOI: 10.2307/2404808.</mixed-citation><mixed-citation xml:lang="en">Nilsson C., Nilsson G., (1995) The Fragility of Ecosystems: A Review. Journal of Applied Ecology 32(4):677–692, DOI: 10.2307/2404808.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Othman A.A., Al-Saady Y.I., Al-Khafaji A.K., &amp; Gloaguen R. (2014). Environmental change detection in the central part of Iraq using remote sensing data and GIS. Arabian Journal of Geosciences, 7(3), 1017–1028, DOI:10.1007/s12517-013-0870-0.</mixed-citation><mixed-citation xml:lang="en">Othman A.A., Al-Saady Y.I., Al-Khafaji A.K., &amp; Gloaguen R. (2014). Environmental change detection in the central part of Iraq using remote sensing data and GIS. Arabian Journal of Geosciences, 7(3), 1017–1028, DOI:10.1007/s12517-013-0870-0.</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Pettorelli N., Vik J.O., Mysterud A., Gaillard J.M., Tucker C.J., Stenseth N.C., (2005) Using the satellite-derived NDVI to assess ecological responses to environmental change, Trends in Ecology &amp; Evolution, 20 (9), pages 503–510, DOI: 10.1016/j.tree.2005.05.011.</mixed-citation><mixed-citation xml:lang="en">Pettorelli N., Vik J.O., Mysterud A., Gaillard J.M., Tucker C.J., Stenseth N.C., (2005) Using the satellite-derived NDVI to assess ecological responses to environmental change, Trends in Ecology &amp; Evolution, 20 (9), pages 503–510, DOI: 10.1016/j.tree.2005.05.011.</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Phinzi K., &amp; Ngetar N.S. (2019). The assessment of water-borne erosion at catchment level using GIS-based RUSLE and remote sensing: A review. International Soil and Water Conservation Research, 7(1), 27–46, DOI:10.1016/j.iswcr.2018.12.002.</mixed-citation><mixed-citation xml:lang="en">Phinzi K., &amp; Ngetar N.S. (2019). The assessment of water-borne erosion at catchment level using GIS-based RUSLE and remote sensing: A review. International Soil and Water Conservation Research, 7(1), 27–46, DOI:10.1016/j.iswcr.2018.12.002.</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Qiao C., Luo J., Sheng Y., Shen Z., Zhu Z., &amp; Ming D. (2012). An adaptive water extraction method from remote sensing image based on NDWI. Journal of the Indian Society of Remote Sensing, 40(3), 421–433, DOI:10.1007/s12524-011-0162-7.</mixed-citation><mixed-citation xml:lang="en">Qiao C., Luo J., Sheng Y., Shen Z., Zhu Z., &amp; Ming D. (2012). An adaptive water extraction method from remote sensing image based on NDWI. Journal of the Indian Society of Remote Sensing, 40(3), 421–433, DOI:10.1007/s12524-011-0162-7.</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">Rawat J.S., &amp; Kumar M. (2015). Monitoring land use/cover change using remote sensing and GIS techniques: A case study of Hawalbagh block, district Almora, Uttarakhand, India. The Egyptian Journal of Remote Sensing and Space Science, 18(1), 77–84, DOI:10.1016/j.ejrs.2015.02.002.</mixed-citation><mixed-citation xml:lang="en">Rawat J.S., &amp; Kumar M. (2015). Monitoring land use/cover change using remote sensing and GIS techniques: A case study of Hawalbagh block, district Almora, Uttarakhand, India. The Egyptian Journal of Remote Sensing and Space Science, 18(1), 77–84, DOI:10.1016/j.ejrs.2015.02.002.</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">Renza D., Martinez E., Arquero A., &amp; Sanchez J. (2010). Drought estimation maps by means of multidate Landsat fused images. Proceedings of the 30th EARSeL Symposium. 775–782. [Google Scholar].</mixed-citation><mixed-citation xml:lang="en">Renza D., Martinez E., Arquero A., &amp; Sanchez J. (2010). Drought estimation maps by means of multidate Landsat fused images. Proceedings of the 30th EARSeL Symposium. 775–782. [Google Scholar].</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">Sakowska K., Juszczak R., &amp; Gianelle D. (2016). Remote sensing of grassland biophysical parameters in the context of the Sentinel-2 satellite mission. Journal of Sensors. DOI:10.1155/2016/4612809.</mixed-citation><mixed-citation xml:lang="en">Sakowska K., Juszczak R., &amp; Gianelle D. (2016). Remote sensing of grassland biophysical parameters in the context of the Sentinel-2 satellite mission. Journal of Sensors. DOI:10.1155/2016/4612809.</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">Semeraro T., Luvisi A., Lillo, A.O., Aretano R., Buccolieri R., &amp; Marwan N. (2020). Recurrence Analysis of Vegetation Indices for Highlighting the Ecosystem Response to Drought Events: An Application to the Amazon Forest. Remote Sensing, 12(6), 907. DOI: 10.3390/rs12060907.</mixed-citation><mixed-citation xml:lang="en">Semeraro T., Luvisi A., Lillo, A.O., Aretano R., Buccolieri R., &amp; Marwan N. (2020). Recurrence Analysis of Vegetation Indices for Highlighting the Ecosystem Response to Drought Events: An Application to the Amazon Forest. Remote Sensing, 12(6), 907. DOI: 10.3390/rs12060907.</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">Shahabi H., Shirzadi A., Ghaderi K., Omidvar E., Al-Ansari N., Clague J.J., ... &amp; Ahmad A. (2020). Flood detection and susceptibility mapping using Sentinel-1 remote sensing data and a machine learning approach: Hybrid intelligence of bagging ensemble based on k-nearest neighbor classifier. Remote Sensing, 12(2), 266, DOI:10.3390/rs12020266.</mixed-citation><mixed-citation xml:lang="en">Shahabi H., Shirzadi A., Ghaderi K., Omidvar E., Al-Ansari N., Clague J.J., ... &amp; Ahmad A. (2020). Flood detection and susceptibility mapping using Sentinel-1 remote sensing data and a machine learning approach: Hybrid intelligence of bagging ensemble based on k-nearest neighbor classifier. Remote Sensing, 12(2), 266, DOI:10.3390/rs12020266.</mixed-citation></citation-alternatives></ref><ref id="cit31"><label>31</label><citation-alternatives><mixed-citation xml:lang="ru">Sonobe R., Yamaya Y., Tani H., Wang X., Kobayashi N., &amp; Mochizuki K. I. (2018). Crop classification from Sentinel-2-derived vegetation indices using ensemble learning. Journal of Applied Remote Sensing, 12(2), 026019, DOI: 10.1117/1.JRS.12.026019.</mixed-citation><mixed-citation xml:lang="en">Sonobe R., Yamaya Y., Tani H., Wang X., Kobayashi N., &amp; Mochizuki K. I. (2018). Crop classification from Sentinel-2-derived vegetation indices using ensemble learning. Journal of Applied Remote Sensing, 12(2), 026019, DOI: 10.1117/1.JRS.12.026019.</mixed-citation></citation-alternatives></ref><ref id="cit32"><label>32</label><citation-alternatives><mixed-citation xml:lang="ru">The Rio Declaration on Environment and Development (1992) United Nations Conference on the Environment and Development – UNCED, Rio de Janeiro.</mixed-citation><mixed-citation xml:lang="en">The Rio Declaration on Environment and Development (1992) United Nations Conference on the Environment and Development – UNCED, Rio de Janeiro.</mixed-citation></citation-alternatives></ref><ref id="cit33"><label>33</label><citation-alternatives><mixed-citation xml:lang="ru">Toming K., Kutser T., Laas A., Sepp M., Paavel B., &amp; Nõges T. (2016). First experiences in mapping lake water quality parameters with Sentinel-2 MSI imagery. Remote Sensing, 8(8), 640, DOI: 10.3390/rs8080640.</mixed-citation><mixed-citation xml:lang="en">Toming K., Kutser T., Laas A., Sepp M., Paavel B., &amp; Nõges T. (2016). First experiences in mapping lake water quality parameters with Sentinel-2 MSI imagery. Remote Sensing, 8(8), 640, DOI: 10.3390/rs8080640.</mixed-citation></citation-alternatives></ref><ref id="cit34"><label>34</label><citation-alternatives><mixed-citation xml:lang="ru">Vihervaara P., Auvinen A. P., Mononen L., Törmä M., Ahlroth P., Anttila S., ... &amp; Virkkala R. (2017). How essential biodiversity variables and remote sensing can help national biodiversity monitoring. Global Ecology and Conservation, 10, 43–59, DOI: 10.1016/j.gecco.2017.01.007.</mixed-citation><mixed-citation xml:lang="en">Vihervaara P., Auvinen A. P., Mononen L., Törmä M., Ahlroth P., Anttila S., ... &amp; Virkkala R. (2017). How essential biodiversity variables and remote sensing can help national biodiversity monitoring. Global Ecology and Conservation, 10, 43–59, DOI: 10.1016/j.gecco.2017.01.007.</mixed-citation></citation-alternatives></ref><ref id="cit35"><label>35</label><citation-alternatives><mixed-citation xml:lang="ru">Wang J., Ding J., Yu D., Ma X., Zhang Z., Ge X., ... &amp; Guo Y. (2019). Capability of Sentinel-2 MSI data for monitoring and mapping of soil salinity in dry and wet seasons in the Ebinur Lake region, Xinjiang, China. Geoderma, 353, 172–187, DOI: 10.1016/j.geoderma.2019.06.040.</mixed-citation><mixed-citation xml:lang="en">Wang J., Ding J., Yu D., Ma X., Zhang Z., Ge X., ... &amp; Guo Y. (2019). Capability of Sentinel-2 MSI data for monitoring and mapping of soil salinity in dry and wet seasons in the Ebinur Lake region, Xinjiang, China. Geoderma, 353, 172–187, DOI: 10.1016/j.geoderma.2019.06.040.</mixed-citation></citation-alternatives></ref><ref id="cit36"><label>36</label><citation-alternatives><mixed-citation xml:lang="ru">Xu H. (2006). Modification of normalised difference water index (NDWI) to enhance open water features in remotely sensed imagery. International journal of remote sensing, 27(14), 3025–3033, DOI: 10.1080/01431160600589179.</mixed-citation><mixed-citation xml:lang="en">Xu H. (2006). Modification of normalised difference water index (NDWI) to enhance open water features in remotely sensed imagery. International journal of remote sensing, 27(14), 3025–3033, DOI: 10.1080/01431160600589179.</mixed-citation></citation-alternatives></ref><ref id="cit37"><label>37</label><citation-alternatives><mixed-citation xml:lang="ru">Yang G., Chen Z., (2015) RS-based fuzzy multiattribute assessment of eco-environmental vulnerability in the source area of the Lishui River of northwest Hunan Province, China. Natl. Hazards 78, 1145–1161, DOI: 10.1007/s11069-015-1762-2.</mixed-citation><mixed-citation xml:lang="en">Yang G., Chen Z., (2015) RS-based fuzzy multiattribute assessment of eco-environmental vulnerability in the source area of the Lishui River of northwest Hunan Province, China. Natl. Hazards 78, 1145–1161, DOI: 10.1007/s11069-015-1762-2.</mixed-citation></citation-alternatives></ref><ref id="cit38"><label>38</label><citation-alternatives><mixed-citation xml:lang="ru">Yang X., Zhao S., Qin X., Zhao N., &amp; Liang L. (2017). Mapping of urban surface water bodies from Sentinel-2 MSI imagery at 10 m resolution via NDWI-based image sharpening. Remote Sensing, 9(6), 596, DOI: 10.3390/rs9060596.</mixed-citation><mixed-citation xml:lang="en">Yang X., Zhao S., Qin X., Zhao N., &amp; Liang L. (2017). Mapping of urban surface water bodies from Sentinel-2 MSI imagery at 10 m resolution via NDWI-based image sharpening. Remote Sensing, 9(6), 596, DOI: 10.3390/rs9060596.</mixed-citation></citation-alternatives></ref><ref id="cit39"><label>39</label><citation-alternatives><mixed-citation xml:lang="ru">Yuan L., Chen X., Wang X., Xiong Z., &amp; Song C. (2019). Spatial associations between NDVI and environmental factors in the Heihe River Basin. Journal of Geographical Sciences, 29(9), 1548–1564, DOI: 10.1007/s11442-019-1676-0.</mixed-citation><mixed-citation xml:lang="en">Yuan L., Chen X., Wang X., Xiong Z., &amp; Song C. (2019). Spatial associations between NDVI and environmental factors in the Heihe River Basin. Journal of Geographical Sciences, 29(9), 1548–1564, DOI: 10.1007/s11442-019-1676-0.</mixed-citation></citation-alternatives></ref><ref id="cit40"><label>40</label><citation-alternatives><mixed-citation xml:lang="ru">Zhang W.J., Lu Q.F., Gao Z.Q., Peng J. (2008) Response of remotely sensed Normalized Difference Water Deviation Index to the 2006 Drought of eastern Sichuan Basin. Science in China Series D-Earth Sciences, 51(5) 748–758, DOI: 10.1007/s11430-008-0037-0.</mixed-citation><mixed-citation xml:lang="en">Zhang W.J., Lu Q.F., Gao Z.Q., Peng J. (2008) Response of remotely sensed Normalized Difference Water Deviation Index to the 2006 Drought of eastern Sichuan Basin. Science in China Series D-Earth Sciences, 51(5) 748–758, DOI: 10.1007/s11430-008-0037-0.</mixed-citation></citation-alternatives></ref><ref id="cit41"><label>41</label><citation-alternatives><mixed-citation xml:lang="ru">Zhao C., &amp; Lu Z. (2018). Remote sensing of landslides—A review. Remote Sensing, 10(2), 279, DOI: 10.3390/rs10020279.</mixed-citation><mixed-citation xml:lang="en">Zhao C., &amp; Lu Z. (2018). Remote sensing of landslides—A review. Remote Sensing, 10(2), 279, DOI: 10.3390/rs10020279.</mixed-citation></citation-alternatives></ref><ref id="cit42"><label>42</label><citation-alternatives><mixed-citation xml:lang="ru">Zhao J., Ji, G., Tian Y., Chen Y., &amp; Wang Z. (2018). Environmental vulnerability assessment for mainland China based on entropy method. Ecological Indicators, 91, 410–422., DOI:10.1016/j.ecolind.2018.04.016</mixed-citation><mixed-citation xml:lang="en">Zhao J., Ji, G., Tian Y., Chen Y., &amp; Wang Z. (2018). Environmental vulnerability assessment for mainland China based on entropy method. Ecological Indicators, 91, 410–422., DOI:10.1016/j.ecolind.2018.04.016</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
