Abstract
Environmental flow is the minimal flow that has to be discharged maintain healthy ecosystem. National Green Tribunal (NGT) law states 15% of the average lean season flow as the environmental flow. Inability to maintain may incite a decline in the health of the ecosystem. The research work evaluates the sufficiency of the NGT's law on environmental flow using the hydrology method. The proposed work evaluates the environmental flow requirements for Larji Hydropower Dam (126 MW), Kullu, Himachal Pradesh. Traditionally to validate the environmental flow requirement results, one of the environmental flow methods will be used. Here to aid the results of the environmental flow assessment, Geographic Information System applications has been used. The environmental flow requirement evaluated from the Flow Duration Curve is more than the 15% of the average lean season flow. The attempted work concludes that up to 20–25% of average lean season flow shall be maintained as environmental flow. For the current ecosystem, the result has an added advantage and is beneficial to the existing ecosystem.
Published Version
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