Vegetation dynamic in the water level fluctuating zone of Three Gorges reservoir area during 2015-2018 using GF-2

Jiang, Weiwei; Liu, Lun; Zhu, Song; Li, Wentao; Xiao, Henglin

doi:10.1109/iaeac47372.2019.8997814

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“…Cui simulated the dynamic evolution process of vegetation coverage in the WLFZ of Guanting Reservoir based on seven-phase Landsat TM/ETM+/OLI remote sensing images [ 22 ]. Jiang et al analyzed the characteristic of vegetation recovery in WLFZ of Three Gorges reservoir using multi-temporal GF-2 satellite images [ 23 ]. Yin et al studied the 17-year dynamic changes in the WLFZ of Danjiangkou Reservoir using Landsat series and HJ-1A/B satellite images from 2000 to 2016 [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Composition and distribution of vegetation in the water level fluctuating zone of the Lantsang cascade reservoir system using UAV multispectral imagery

et al. 2021

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With the development of a large number of tall dams and large cascade reservoir projects in the Lantsang River Basin, a large water level fluctuating zone (WLFZ) containing cascading reservoirs has formed. This newborn ecosystem is related to the sustainable development of hydropower projects, and has become a new problem to be studied urgently. Taking WLFZs in the Huangdeng, Xiaowan and Nuozhadu Reservoirs in the Lantsang River Basin as study areas, this study used multi-spectral remote-sensing field data obtained with unmanned aerial vehicles (UAVs) to ascertain the species types, coverage, distribution characteristics, dominant species and pioneer species of naturally restored vegetation. The considered data were subjected to UAV data processing, vegetation classification using multi-spectral images and a geographic information system (GIS) terrain-distribution analysis. Results show that: Polygonum Plebeium, Cynodon dactylon, Xanthium sibiricum, Ageratum conyzoides, Eleusine indica, Digitaria sanguinalis and Verbena officinalis are the dominant species of vegetation that could be naturally restored in the WLFZ; the vegetation coverage and the number of species are significantly positively correlated with the age and restoration periods of the WLFZ; the vegetation coverage of each study area increases at first, and then decreases, as a function of elevation; gentle slopes about 0–25°are more suitable for vegetation restoration. This study provides first-hand data on the natural restoration of vegetation in WLFZs, and gives a useful reference for its ecological restoration as a consequence of hydropower cascade development in the Lantsang River Basin. Finally, the study demonstrates that light UAV remote sensing is an attractive choice for investigating vegetation in reservoir WLFZs.

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Section: Introductionmentioning

confidence: 99%