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This chapter innovatively tried to apply water-based indices for exploring the pixel-scale eco-hydrological state including range of variability (RVARange of Variability Approach (RVA))-based flow failureFlow failure estimation, eco-deficit/surplus analysis, and degree of impact at pixel-scale coupling with historical satellite imageries. Result clearly depicted that in the pre-dam phase, safe area in the post-monsoon season was 37% of the total wetlandWetland area, and in post-dam phase, it was decreased to only 9% leading to34% increase of area under high failure rate (FR) (FR > 66%). About 53–62% wetlandWetland area was accounted under high eco-hydrological deficitEco-hydrological deficit zone in post-dam period. Landscape morphological condition shows that growing fragmentation in post-dam period. Eco-hydrological deficitEco-hydrological deficit is more predominant over patch, edge, and small core areas. These statistics prove that damming incident has lead wetlandWetland toward increasing hydrological and ecological vulnerabilities. Pixel-scale identification of eco-hydrological stress would be beneficial for regional-level planning and implementation.

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Eco-hydrological Modification

  • 章节

  • 发表日期：

    2026年

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  • Swades Pal,
  • Swapan Talukdar,
  • Tamal Kanti Saha,
  • Rajesh Sarda

摘要

This chapter innovatively tried to apply water-based indices for exploring the pixel-scale eco-hydrological state including range of variability (RVARange of Variability Approach (RVA))-based flow failureFlow failure estimation, eco-deficit/surplus analysis, and degree of impact at pixel-scale coupling with historical satellite imageries. Result clearly depicted that in the pre-dam phase, safe area in the post-monsoon season was 37% of the total wetlandWetland area, and in post-dam phase, it was decreased to only 9% leading to34% increase of area under high failure rate (FR) (FR > 66%). About 53–62% wetlandWetland area was accounted under high eco-hydrological deficitEco-hydrological deficit zone in post-dam period. Landscape morphological condition shows that growing fragmentation in post-dam period. Eco-hydrological deficitEco-hydrological deficit is more predominant over patch, edge, and small core areas. These statistics prove that damming incident has lead wetlandWetland toward increasing hydrological and ecological vulnerabilities. Pixel-scale identification of eco-hydrological stress would be beneficial for regional-level planning and implementation.