Effects of the Caspian Sea water level change on Boujagh National Park, southwest the Caspian Sea

Khoshravan, H.; Naqinezhad, A.; Alinejad-Tabrizi, T.; Yanina, T.

Авторы: Khoshravan H., Naqinezhad A., Alinejad-Tabrizi T., Yanina T.
Журнал: Caspian Journal of Environmental Sciences
Год издания: 2020
Издательство: UNIV GUILAN
Местоположение издательства: FAC NATURAL RESOURCES, SOMEHE SARA, GUILAN, IRAN,1144
Первая страница: 1
Последняя страница: 12
Аннотация: Nowadays, climate change and sea level rise are serious threats to the social, economical and environmental vulnerability of the ocean coasts all around the world, and the Caspian Sea rapid fluctuations during the thirdmillennium have set different conditions on the environmental structure of coastal areas. The main target of this study is to evaluate the coastline morphology behavior and the deformation of habitats and ecological condition of Boujagh National Park (BNP) due to Caspian Sea level changing during the progression and regression phasesbetween 1978-2019. Initially, based on the available scientific documents, familiarity with the study area was carried out and the axes of measurements were defined. In field operations, sedimentation and erosion units ofcoastal zones and also different habitats were identified and geographically determined. In the next step, the rateof deformation of coastal habitats was calculated and classified using satellite images and GIS, and ultimately,validity of the results was verified with field evidence. The comparison of regression amount in BNP indicated that maximum negative shoreline displacement (892 m) has occurred in the east part of Sefid-rud River mouth during 1978-1995. So that, the shoreline negative changing has reached to 850 m in the north- western of central part of study area, while 738 m in north- eastern of central part in the period of 1995- 2019. The inundation zoneextent has declined 104 ha between 1995 and 2019. Also the sea regression amount of area was 111 ha in the period of 1978- 1995, while changed to 380 ha during 1995-2019. During the last 24 years, there have been widespread environmental alterations in the studied area and a large part of the coastal wetlands has been dried up. The most important habitats affected by the Caspian Sea fluctuations include coastal lagoons, dry and wet sandy beach, fluvial meadow and river estuary.
Добавил в систему: Янина Тамара Алексеевна

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Effects of the Caspian Sea water level change on Boujagh National Park, southwest the Caspian Seaстатья

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