Abstract The Bhagirathi Valley is investigated to understand the impact of various barrages and dams on natural river flow. The multiple barrages and dams in the valley (downstream of the Bhatwari Village) have obstructed/disrupted natural flow of the river which has adversely impacted geomorphological and ecological functions of the river. Besides, it is observed that during and after the implementation of the hydropower projects, the terrain stability was severely affected due to creation of fresh landslide zones, destruction of forest and rural infrastructures including the marginal agricultural lands. The study observes that lack of detailed geological, geomorphological and ecological investigation prior to the execution of the hydropower projects led to the terrain instability. Further, dearth of detailed scientific studies was responsible for the lack of comprehensive engineering/bioengineering measures and catchment area treatment plans as also the measures for reservoir rim slope stability. Taking cognizance from the Bhagirathi valley, present study calls for a detailed multidisciplinary study in the Himalayan valleys where the rivers are likely to get impounded for harnessing hydropower.

中文翻译：

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印度北阿坎德邦喜马拉雅山 Bhagirathi 河受阻的地理环境后果

摘要 对 Bhagirathi 山谷进行了调查，以了解各种拦河坝和大坝对自然河流流量的影响。山谷（Bhatwari 村下游）的多个拦河坝和水坝阻碍/扰乱了河流的自然流动，对河流的地貌和生态功能产生了不利影响。此外，据观察，在水电项目实施期间和实施后，由于形成新的滑坡带、破坏森林和农村基础设施，包括边缘农田，地形稳定性受到严重影响。研究观察到，在水电项目实施前缺乏详细的地质、地貌和生态调查导致地形不稳定。更多，缺乏详细的科学研究是缺乏综合工程/生物工程措施和集水区处理计划以及水库边缘斜坡稳定性措施的原因。考虑到 Bhagirathi 山谷，本研究呼吁在喜马拉雅山谷进行详细的多学科研究，那里的河流可能因利用水电而被蓄水。