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TheEco-hydrological flow indicator of hydrological alteration (IHAIndicator of Hydrological Alteration (IHA)) and range of variability centric eco-hydrological flowEco-hydrological flow in river assessment were tried to be done in this chapter. Ecological flowEcological flow was also estimated in order to provide a guide toward restoration of river flow. Result shoed that mean monthly RVARange of Variability Approach (RVA)-based flow failure rateFlow Failure Rate (FFR) ranges from 7.69 to 69.23%. This degree of hydrological alterationDegree of Hydrological Alteration (DHA) for different IHAIndicator of Hydrological Alteration (IHA) groups range from − 0.65 to − 0.81 which signifies high degree of flow alterationFlow alteration. Integrated degree of impact due to hydrological control is 0.406 which also signifies high degree of flow alterationFlow alteration impact. Flow duration curveFlow Duration Curves (FDC) (FDCFlow Duration Curves (FDC)) analysis revealed that in eco-deficit is more often than eco-surplus. Estimation of environmental flowEnvironmental flow using global flow calculator revealed that the current flow state falls under largely modified environmental management classesEnvironmental Management Classes (EMC) (EMCsEnvironmental Management Classes (EMC)), and in order to restore flow, the amount of flow to be further released from damDam was also computed. The chapter further stated that such change in eco-flow is harmful and going to be further harmful to the river ecology.

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Eco-hydrological Flow

  • 章节

  • 发表日期：

    2026年

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

摘要

TheEco-hydrological flow indicator of hydrological alteration (IHAIndicator of Hydrological Alteration (IHA)) and range of variability centric eco-hydrological flowEco-hydrological flow in river assessment were tried to be done in this chapter. Ecological flowEcological flow was also estimated in order to provide a guide toward restoration of river flow. Result shoed that mean monthly RVARange of Variability Approach (RVA)-based flow failure rateFlow Failure Rate (FFR) ranges from 7.69 to 69.23%. This degree of hydrological alterationDegree of Hydrological Alteration (DHA) for different IHAIndicator of Hydrological Alteration (IHA) groups range from − 0.65 to − 0.81 which signifies high degree of flow alterationFlow alteration. Integrated degree of impact due to hydrological control is 0.406 which also signifies high degree of flow alterationFlow alteration impact. Flow duration curveFlow Duration Curves (FDC) (FDCFlow Duration Curves (FDC)) analysis revealed that in eco-deficit is more often than eco-surplus. Estimation of environmental flowEnvironmental flow using global flow calculator revealed that the current flow state falls under largely modified environmental management classesEnvironmental Management Classes (EMC) (EMCsEnvironmental Management Classes (EMC)), and in order to restore flow, the amount of flow to be further released from damDam was also computed. The chapter further stated that such change in eco-flow is harmful and going to be further harmful to the river ecology.