Surface water and geomorphological changes of the Blue Nile dynamics associated with the Grand Ethiopian Renaissance Dam (GERD): a multi-temporal analysis

Luna, Leidy; Awange, Joseph; Song, Yongze; Bui, Luyen K.; Zerihun, Ayalsew; Kuhn, Michael

doi:10.1080/15481603.2024.2346383

GIScience & Remote Sensing

2024

DOI: 10.1080/15481603.2024.2346383

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Surface water and geomorphological changes of the Blue Nile dynamics associated with the Grand Ethiopian Renaissance Dam (GERD): a multi-temporal analysis

Leidy Luna,

Joseph Awange,

Yongze Song

et al.

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Identifying Determinants of Spatiotemporal Disparities in Ecological Quality of Mongolian Plateau

Wang,

Song,

Zhang

et al. 2024

Remote Sensing

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Vegetation quality is crucial for maintaining ecological health, and remote sensing techniques offer precise assessments of vegetation’s environmental quality. Although existing indicators and remote sensing approaches provide extensive spatial coverage, challenges remain in effectively integrating diverse indicators for a comprehensive evaluation. This study introduces a comprehensive ecological quality index (EQI) to assess vegetation quality on the Mongolian Plateau from 2001 to 2020 and to identify the determinants of EQI variations over space and time. We developed the EQI using remotely sensed normalized difference vegetation index (NDVI) data and the net primary productivity (NPP). Our analysis revealed distinct spatial patterns, with high ecological quality concentrated in northern Mongolia and eastern Inner Mongolia. Temporal fluctuations, indicative of ecological shifts, were primarily observed in eastern Mongolia and specific zones of Inner Mongolia. We employed a Geographically Optimal Zones-based Heterogeneity (GOZH) model to analyze the spatial scales and interactions influencing EQI patterns. This study found that precipitation, with an Omega value of 0.770, was the dominant factor affecting the EQI, particularly at spatial scales of 40–50 km. The GOZH model provided deeper insights into the spatial determinants of the EQI compared with previous models, highlighting the importance of climatic variables and their interactions in driving ecological quality. This research enhanced our understanding of vegetation quality dynamics and established a foundation for ecosystem conservation and informed management strategies, emphasizing the critical role of climate, especially precipitation, in shaping ecological landscapes.

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Identifying Determinants of Spatiotemporal Disparities in Ecological Quality of Mongolian Plateau

Wang,

Song,

Zhang

et al. 2024

Remote Sensing

View full text Add to dashboard Cite

show abstract

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Surface water and geomorphological changes of the Blue Nile dynamics associated with the Grand Ethiopian Renaissance Dam (GERD): a multi-temporal analysis

Cited by 1 publication

References 63 publications

Identifying Determinants of Spatiotemporal Disparities in Ecological Quality of Mongolian Plateau

Identifying Determinants of Spatiotemporal Disparities in Ecological Quality of Mongolian Plateau

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