Glaciers and Polar Ice Caps

The HKH region is one of the most dynamic, fragile, and complex mountain systems in the world as a result of tectonic activity and the rich diversity of climates, hydrology, and ecology. The high Himalayan region is the freshwater tower of South Asia and has the highest concentration of snow and glaciers outside the polar regions giving it the name Third Pole.

Balati glacier, Pithoragarh district, Uttarakhand (Source: Uttarakhand and I)

The Hindu Kush-Himalayan region has had very few resources to develop a detail scientific understanding needed to assess climatological, environmental, and other data in the past and there is very little information upon which a baseline for comparison with the present can be formed and future impacts can be anticipated.

It includes the present and planned water utilisation across sectors and uses, within a framework of environment, conservation and sustainability. It also examined the present institutional arrangements for water resources management and assessed the requirements for institutional development, improvement in data collection and analysis, catchment and agriculture planning, and other reforms required to ensure sustainable water resources management.

This was done as a part of a project that aimed at compiling scientifically robust and impartial information on the physical impacts of climate change for more than 20 countries.

The Ganges river system originates in the Central Himalayas, and extends into the alluvial Gangetic Plains and drains into the Indian Ocean at the Bay of Bengal. In the upstream mountainous regions, hydropower is the main focus of development with mega and micro projects either under construction or being planned in both Nepal and India.

After the main river channel reaches the plains, it is highly regulated with dams, barrages and associated irrigation canals. All this infrastructure development and abstractions affects the river’s flow regime and reduces flows, which, in turn, impacts downstream water availability, water quality and riverine ecosystems. Furthermore, there are concerns that climate change is likely to exacerbate the water scarcity problem in the Ganges Basin. Therefore, modeling the hydrology of the basin is critical for estimation, planning and management of current and future water resources.

This report by the Assam Science Technology & Environment Council (ASTEC) contains the compiled recommendation of three consultative workshops organized in Assam University, Gauhati University and

The MoEF discussion paper on Himalayan glaciers studies the phenomenon of glaciations and glacier dynamics, a phenomenon that has attained significant attention in recent years, on account of the general belief that global warming and climate change is leading to fast degeneration of glaciers in the Himalayas. It is argued that this would, in the long run, have an adverse effect on the environment, climate and the water.

This article published in the journal Current Science presents the findings of a study that aimed at developing a rapid inventory on the impact of the recent climatic changes on the ecosystem, flora and fauna of the Himalayan region with a special emphasis on livelihoods.  

To provide the background hydrological information for the assessment of environmental flow requirements at four selected ‘Environmental Flow’ sites, a hydrological model was set up to simulate the catchment in the present state (with water regulation  infrastructure) and to generate the natural flows (without water regulation infrastructure).

The greater Himalayan region “the roof of the world” – contains the most extensive and rugged high altitude areas on Earth, and the largest areas covered by glaciers and permafrost outside the polar regions.