Shimla-The area under snow cover in Himachal Pradesh has declined by 18.5% according to a recent report published by State Centre on Climate Change (SCCC) and Space Application Center (ISRO) Ahmedabad. The report revealed this decreasing trend for the five major river basins in the State.

As the report points out, the high altitude regions of Himachal Pradesh receive precipitation mainly in the form of snow during the winter season. One-third of the geographical area of ​​the state is covered by a thick blanket of snow during the winter season. Rivers like Chenab, Beas, Parvati, Baspa, Spiti, Ravi, Sutlej and its tributaries flowing through Himachal are dependent on snowfall in winter. These rivers mainly feed into the Indus water system and a decline at this rate rings a death knell for water and also food security for millions of people from Himachal to Kashmir, the plains of Punjab, the food bowl of the country.

Using images and data received from satellites, the report states, that the winter precipitation was mapped in all the basins from October 2020 to May 2021 (a period of two years). The findings indicate that there has been an average decrease of 8.92 percent in Chenab basin, 18.54 percent in Beas basin, 23.16 percent in Ravi basin, 23.49 percent in Sutlej basin compared to last year. The ice covered area of ​​Chenab basin was 7154.11 sq km in 2019-20, which has come down to 6515.91 sq km in 2020-21. Similarly, Beas basin was reduced from 2457.68 to 2002.03 square kilometer, Ravi basin from 2108.13 square kilometer to 1619.82 square kilometer and Sutlej from 11823.1 square kilometer to 9045 square kilometers. Overall, the snow covered area was reduced from 23542 square kilometer to 19183 square kilometer in the entire Himachal.

Figure Source: Hindustan Times

Sutlej Basin covers 45 per cent of the total geographical area of Himachal and it is the longest river of the state. It flows for around 320 kms here, passing through Lahaul and Spiti, Kinnaur, Shimla, Kullu, Mandi, Solan and Bilaspur districts, along its course. The above study shows that the maximum reduction in snow cover has occurred in the Sutlej basin. An area of ​​4359 square kilometers under snow cover has decreased for the whole state, of which more than half of the Sutlej Basin.

Just two years ago another study had indicated that more than half of glaciers in Sutlej Basin are set to vanish by 2050. Yet another study also showed that the Sutlej basin has the highest 562 number of glacial lakes. These lakes stand the risk of sudden outbursts, which then causes flash floods downstream as the valley has already experienced. So, while the crisis that is unfolding, be it deglaciation, lake formation or reduction in area under snow cover, it seems that the Sutlej river basin is more vulnerable to these changes.

Prakash Bhandari, an environmental researcher and activist and member of Himdhara Collective expressing his concern states that the situation in the Sutlej river basin is certainly indicative of a serious climate emergency and it is critical to look into the drivers of this both local and global.

“The Sutlej basin catchment is the largest and so the changes visible here are more significant. Many factors have worked together to create this crisis which should be studied closely. There is no doubt that global warming is contributing to these changes. But the local conditions also play a role in reducing or increasing its impact”, he says.

The upper reaches of the Sutlej Valley, especially areas like Kinnaur are geologically fragile, with sharp gradients and loose soil strata. Vegetation is in a very small area so the proneness to erosion. We have seen the catastrophic impacts of flashfloods and landslides over the last decade and a half, where crores worth of property has been damaged. This year saw a spate of landslides where lives were lost. “In such a sensitive and also strategically important area, changes in the landscape will have far reaching and irreversible impacts. More construction activities will lead to more deforestation, more erosion”.  

Construction of dams has been rampant in the Sutlej valley, a phenomena that started post independence and continues today. If all of the planned dams are built the Sutlej will be cho-a-cloc with more then 150, large and small projects. At the bottom of the valley in Bilaspur is the Bhakra Dam, built almost 6 decades ago, which has a size of 168 sq km and a storage capacity of 9.340 cubic km. Is. This is followed by the Kol Dam which extends for 42 km up to Sunni, which has a total storage capacity of 90 million cubic metres. Nathpa Jhakri Project which is 27.394 kms. is long. When a dam is built, a huge amount of water is stored. The debris of many villages, trees etc. also gets absorbed inside the dam. When water is stagnant, it receives heat from the Sun to form mist in the surrounding area by evaporation and simultaneously generates methane gas. The experience of the lake formed by the Kol dam at Tattapani in Mandi district shows that the area is experiencing heavy haze which was not there earlier.

“In the 30s and 40s, Shikari Devi and Kamrunag used to have snow on the peaks for about 6 months, which now could barely stop for only 2 months. The air route distance of Shikari Devi and Kamrunag is only 26 to 30 kms from Tattapani lake. At the same time, their distance is not much from the cement factories of Darlaghat, Sundernagar”, the elders in the area say. “Today, fog is prevalent and this has also made the area warmer”.

Due to the warming of the weather due to the clouds formed from the mist, the snow has started melting quickly. Apart from this the local crop patterns are affected. Post the 1990s, the Sutlej became a site for run of the river hydroelectric projects using extensive underground tunneling. This involves massive use of explosives for blasting through the mountains. Of the 23,000 MW worth of projects to be constructed in Himachal more than 10,000, a third are from this valley alone. Kinnaur continues to be a hydel powerhouse with 10 run of the river projects in progress and 30 more to be set up including two mega projects of 1500 MW and 1000 MW each. This paints a scary picture.

Interactive Sutlej River-Basin Map indicate Hydropower Station location

It is not just the hydro-electric dams but unplanned tourism and other development activities like mining, cement plants, road expansion and mindless construction across the high Himalayan regions have also add to the shift in local weather patterns, land use changes and thus the ecological crisis. But the reason why we should put the limelight on hydropower is that this is being pushed as “Green Energy”, in the name of climate change mitigation. As opposed to other forms of generating power, hydropower projects are said to cause lesser carbon emissions, which is why there has been a global push to shift to renewable resources. But the climate emergency in the Himalayas has put a question mark on ‘water’ as a renewable resource.

The question then arises that with all this data indicating a steady decline in river discharge and snow cover have our planners and policy makers not considered what will happen to these projects? Will they be able to generate the power they propose to? The people of Himalaya have to wake up to this wastage of public resources. Scarce funds should be diverted to better planning for securing local livelihoods by protecting the forest ecosystems and water sources for the future.

Author: Gagandeep Singh-From Himdhara (Environment Research and Action Collective)

Feature Images:  unsplash/@raimondklavins