Smaller hydrologic units detect a substantial decrease in river flow and dryness during the non-monsoon season (sub-catchments and watersheds). River flow depletion or drying is typically noticed near the source and subsequently progresses across the bigger hydrologic units. Rivers are losing water for a variety of causes, including the construction of dams and the usage of irrigation water. However, in many situations, the reduction in flow is due to climate change, which is altering rainfall patterns and increasing evaporation as temperatures rise. Reduced run-off is putting increased pressure on freshwater resources around the world, including in India, especially when demand for water rises as the population grows. Despite the fact that significant quantities of money have been spent on river rehabilitation around the world, there is a lack of understanding of the science of restoration. A scientific and global intervention and technique to address such difficulties in India's river management demands a highly effective approach that is process-based, predictive, and capable of producing the desired outcome. River restoration is one of the most well-known fields of applied water-resources science, sustaining a multibillion-dollar sector in many countries and driving fundamental river research to fill knowledge gaps that obstruct successful restoration. A revival strategy should outline the river basin's long-term prospects, the strategy's desired outcome (goals) across the planning horizon, and specific, quantifiable targets to be met in the short to medium term (objectives). A mix of policies, strategies, and project-level and global-level planning can help with river restoration. With this in mind, this paper discusses some of the revival efforts made both in India and overseas.
Please see the link :- https://www.journalijecc.com/index.php/IJECC/article/view/30297
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