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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Современные проблемы дистанционного зондирования Земли из космоса
физические основы, методы и технологии мониторинга окружающей среды, потенциально опасных явлений
и объектов

  

Современные проблемы дистанционного зондирования Земли из космоса. 2022. Т. 19. № 5. С. 176-189

Анализ временных рядов динамики лесного покрова по градиенту высот в провинции Ганьсу, Китай

И. Ван 1 , Э.А. Курбанов 1 , О.Н. Воробьев 1 
1 Поволжский государственный технологический университет, Йошкар-Ола, Россия
Одобрена к печати: 20.10.2022
DOI: 10.21046/2070-7401-2022-19-5-176-189
В исследовании для оценки динамики лесного покрова с 1990 по 2021 г. вокруг г. Чжанъе в китайской провинции Ганьсу использовались временные ряды спутниковых данных Landsat и экологический индекс дистанционного зондирования (RSEI — англ. Remote Sensing Environmental Index). Также был изучен и проанализирован градиент высот исследуемой территории. На основе традиционного метода регрессии временные ряды были разделены на три тренда кривых RSEI: логарифмического, логистического и экспоненциального типа, которые использовались для оценки текущего состояния леса. Результаты показали, что за последние 32 года на 96,0 % площади лесов Чжанъе показатель RSEI увеличился, на 1,4 % — понизился и остался неизменным на 2,56 %. Среди девяти графиков состояния лесного покрова преобладает линейный тренд. На 89,9 % площади лесная экосистема остаётся стабильной, на 10,1 % находится в процессе изменений. Существуют очевидные различия между типами лесов и их RSEI-трендами по градиенту высот. Увеличение RSEI наблюдается при нормальном распределении между 2500 и 4500 м, в то же время область снижения RSEI образует бимодальное распределение в двух интервалах высот: 500–2500 и 3000–4500 м. Детальная дифференциация трендов временных рядов лесного покрова позволяет более чётко определить лесные площади, которые требуют защиты.
Ключевые слова: RSEI, временные ряды, лесной покров, мониторинг, Landsat, Китай, анализ трендов, логистическая модель
Полный текст

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