Nepal Himalayas

This manual by International Centre for Integrated Mountain Development (ICIMOD) deals with an inventory of Greater Himalayan Wetlands and has been developed to assist governm

Author: Anupam Mishra

"The water in springs of my hills is cool, Do not migrate from this land o my beloved.”

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.

Recent scientific studies show that global warming is already causing environmental changes that will have significant global economic and social impacts. As the world's 4th largest emitter of greenhouse gases, India has to juggle the imperative demand for economic development with pressures for greater efficiency in the use of energy.

Climate change is a change in the statistical properties of the climate system when considered over long periods of time, regardless of cause. Climate change reflects a change in the energy balance of the climate system, i.e. changes the relative balance between incoming solar radiation and outgoing infrared radiation from Earth. The threat emanates from accumulated green house gas emissions in the atmosphere, generated through long term and intensive industrial growth and high consumption life styles of developed countries.

This report by the Strategic Foresight Group is a follow-up to its earlier report The Himalayan Challenge: Water Security in Emerging Asia, 2010 . The growing water stress, plans for dams on shared rivers, and uncertainties about the precise impact of climate change have brought water to the forefront of the political agenda of countries in the Himalayan River Basins.

The report recommends policy options for national governments as well as strategies which can be implemented by local authorities and community groups in a politically viable manner. Some of the ideas may on the surface appear to be addressing micro-level issues. However, such micro-level issues do have an important bearing on security at the macro-level in a large continent such as Asia. This is the experience of many other regions as well, as illustrated in several of the chapters in this report.

The objective of this report is to explore how river basins in the Himalayan region, and particularly shared water resources, can foster cooperation and security between Bangladesh, China, India and Nepal. The conventional view is that depleting water resources, growing problem of pollution, uncertain risks posed by climate change together may lead to competition for resources, migration, social instability, internal conflicts and diplomatic tensions between countries. This view is realistic and was discussed in detail in a previous report of Strategic Foresight Group. It has contributed to spreading the awareness of security risks associated with water crisis in the Himalayan region.

However, increasing anthropogenic intervention in the recent times appears to be contributing to terrain instability in addition to natural factors, as observed by increasing frequency and magnitude of landslides since 1970.

During August and September 2010, Uttarakhand Himalaya witnessed large-scale slope destabilization, particularly along the roads where widening work was in progress leading to huge damage. The cause of regional-scale landslides has been attributed to exceptionally high rainfall in the region during September. When the average rainfall for the month of August and September from 2000 to 2009 is compared with rainfall data of the same period of 2010, it was found that in September 2010, 336 per cent higher rainfall was received by the area. However, the question that arises is: was it unusual rainfall-induced calamity or a result of human intervention?

It explores the understanding of the local controls on the retreat of glaciers of the Baspa valley in Himachal Pradesh. The geomorphic records mapped are accumulation zone, exposed ablation zone, moraine-covered ablation zone, snout, deglaciated valley, lateral moraine, medial moraine, terminal moraine and hanging glacier.

This report by ICIMOD contains an assessment of the threat facing the Hindu Kush-Himalayan region from the recent (post-1950s) and rapid formation of meltwater lakes on the surface or at the end of a large number of the region’s glaciers owing to current climate warming. Individual case studies of the catastrophic outburst (glacial lake outburst floods or GLOFs) from such glacial lakes are introduced.