气候变化领域集成服务门户(CCPortal): Remote sensing assessment of anthropogenic and climate variation effects on river channel morphology and vegetation: Impact of dry periods on a European piedmont river

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DOI	10.1002/esp.5791
	Remote sensing assessment of anthropogenic and climate variation effects on river channel morphology and vegetation: Impact of dry periods on a European piedmont river
	Nones, Michael; Guerrero, Massimo; Schippa, Leonardo; Cavalieri, Irene
发表日期	2024
ISSN	0197-9337
EISSN	1096-9837
起始页码	49
结束页码	5
卷号	49 期号:5
英文摘要	Rivers are subject to increasing human pressure, resulting in a loss of their natural characteristics, further enhanced by climate change. The present study focuses on a piedmont reach of the Italian Po River and combines Landsat satellite information with hydrological records to investigate changes in sandbars exposure and riparian vegetation coverage, considering the summer period of 1984-2022. Satellite data were handled via Google Earth Engine, looking at common indexes such as the Modified Normalized Difference Water Index, which was used to identify temporal variations in wetted channel area, and the Normalized Difference Vegetation Index, considered as a proxy of vegetation coverage variations. Changes in the river hydrology were analysed by looking at the annual minimum water levels, the discharge duration curve, the stage-discharge relationship and the yearly annual water volume. Results suggest that a process of oversimplification is affecting this reach of the Po River, showing how climate change can affect piedmont European watercourses. Indeed, after an initial period where bars tended to be barer and somehow stable over time, in the most recent decade a different trend appeared, with vegetation able to colonize the exposed sandbars more. Using the Po River as an exemplary case study, this work suggests that prolonged dry periods, which are more common in recent decades, might impact large and medium rivers located in temperate climates, favouring the development of vegetation on exposed sandbars, eventually resulting in a less dynamic active channel. This research focuses on a piedmont reach of the Italian Po River, and combines satellite information with hydrological records to investigate changes in sandbars exposure and riparian vegetation coverage, considering the summer period 1984-2022. Using the Po River as an exemplary case study, the work shows that prolonged dry periods, more common in recent decades, might impact large and medium rivers located in temperate climates, favouring the development of vegetation on exposed sandbars, resulting in a less dynamic active channel. image
英文关键词	active channel dynamics; drought; Landsat; morphological evolution; Po River; remote sensing; riparian vegetation; river hydrology
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001172601900001
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290891
作者单位	Polish Academy of Sciences; Institute of Geophysics of the Polish Academy of Sciences; University of Bologna; University of Ferrara
推荐引用方式 GB/T 7714	Nones, Michael,Guerrero, Massimo,Schippa, Leonardo,et al. Remote sensing assessment of anthropogenic and climate variation effects on river channel morphology and vegetation: Impact of dry periods on a European piedmont river[J],2024,49(5).
APA	Nones, Michael,Guerrero, Massimo,Schippa, Leonardo,&Cavalieri, Irene.(2024).Remote sensing assessment of anthropogenic and climate variation effects on river channel morphology and vegetation: Impact of dry periods on a European piedmont river.EARTH SURFACE PROCESSES AND LANDFORMS,49(5).
MLA	Nones, Michael,et al."Remote sensing assessment of anthropogenic and climate variation effects on river channel morphology and vegetation: Impact of dry periods on a European piedmont river".EARTH SURFACE PROCESSES AND LANDFORMS 49.5(2024).