Ice Stupa Artificial Glaciers: Solving Ladakh's Water Crisis

In Siachen, agriculture is supported by glacial water that melts from the Siachen Glacier. This glacial water is extremely cold and flows down to irrigate the fields. The video shows how the glacier meltwater is used to water crops, demonstrating the relationship between glacial geography and agricultural practices in the region.

Glacial meltwater creates fertile agricultural land. The instructor uses the example of Canadian prairies, where glacial meltwater deposited rich sediments. The Chinnook wind melts snow, making land available for farming and grazing. This demonstrates how glacial processes create productive agricultural regions.

As air temperatures increase, glacier volume decreases, but initially produces more meltwater. This creates a temporary 'boom' period where glaciers release greater amounts of water during dry seasons, benefiting agriculture and irrigation. However, this increased meltwater production is temporary because as glaciers shrink, they eventually lose their capacity to store and slowly release water. Once glaciers become too small, they can no longer provide this seasonal buffering function.

The video presenter explains that the well-developed irrigation channels (suro) in this village are maintained because of glacial meltwater. The presenter states that glaciers in the region melt during warmer periods, producing water that is then channeled through these irrigation systems to support agriculture. This demonstrates how mountainous regions with glaciers utilize natural water sources for agricultural purposes, creating sustainable irrigation infrastructure that takes advantage of seasonal glacial melt patterns.

The video describes how glacial meltwater patterns change seasonally in mountainous regions. During late summer months, glaciers begin to recede and some ice melts while other areas refreeze, resulting in reduced water flow in rivers and streams. In contrast, during July (monsoon season), increased glacial melting produces abundant water. This seasonal variation affects local ecosystems, agriculture, and water availability for communities dependent on glacial runoff.

The Himalayas serve as Asia's critical 'water tower,' supplying water to approximately 25% of the global population through major river systems like the Indus, Ganges, and Brahmaputra. Research reveals that while glaciers in the southern Himalayan arc are losing mass at rates of about 40 cm water equivalent per year, the Karakoram region exhibits a paradoxical 'anomaly' where glaciers remain stable or even gain mass due to factors including increased atmospheric moisture from regional irrigation and unique glacier properties. Future projections under the Paris Agreement's 1.5°C warming target suggest 36% glacier mass loss by 2100, while RCP 4.5/6.0 scenarios project 50% loss. However, average water availability may remain relatively stable due to compensating increases in precipitation and glacial melt, though significant challenges include seasonal shifts in runoff timing and increased hydrological extremes, with socio-economic water demand growth potentially exceeding climate-driven changes.

IIT Indore's study reveals dramatic Gangotri glacier retreat—from 147 glaciers in 1971 to just 37 today—despite global temperature increases of 1.4°C and Himalayan warming of 2°C above pre-industrial levels. The paradox of declining snow melt despite rising temperatures results from reduced precipitation due to increased evaporation. The Gangotri system covers 549 km² at elevations of 3,700-7,000 meters, sustaining 580 million people dependent on Ganga waters. With business-as-usual emissions trajectories projecting 4-5°C warming in the Hindu Kush Himalaya by 2100, this threatens water supplies, food security, and could displace millions. India has launched the National Mission for Sustaining Himalayan Ecosystem and established research station Himman in Chandra basin.

Climate change is causing Himalayan glaciers to melt and recede, transforming snow-covered mountains into bare rock, which threatens local ecosystems, increases landslide risks, and endangers communities in high-altitude regions like Lamtang, while also impacting Nepal's tourism industry and natural beauty that the country promotes globally.

The monsoon is described as the soul of India, being both essential for feeding over 1.3 million people and potentially destructive when it floods everything in its path. The Brahmaputra River, combined with accelerated Himalayan glacier melting, increases flow and eats away at shores rapidly. Local observations indicate Himalayan glaciers are disappearing due to rising temperatures, with less abundant snowfall compared to previous decades. Villagers attribute these changes to pollution. The most dangerous time to drive on Himalayan roads is during spring when snow begins to melt, creating unstable conditions. At high altitudes, winter completely covers roads with ice, eliminating visibility and making travel impossible. These interconnected environmental changes demonstrate how climate change transforms multiple aspects of life simultaneously, from transportation safety to agricultural viability.

Himalayan glaciers are the water source for 150 crore Indians, with most northern Indian rivers depending on them. Rapid melting will first cause floods followed by complete drought. A single glacier contains as much water as an entire river. The ice-albedo feedback loop creates a dangerous cycle: melting ice exposes dark soil that absorbs more heat, causing more melting. Water vapor released from melting glaciers acts as a powerful greenhouse gas, further accelerating warming. This creates multiple interconnected feedback loops that make climate change increasingly severe.

The rate of heat flow through a rod is given by dQ/dt = kAΔT/L, where k is thermal conductivity, A is cross-sectional area, ΔT is temperature difference, and L is length. The heat required to melt ice is dQ = mLf, where m is mass and Lf is latent heat of fusion. Equating these gives the rate of ice melting: dm/dt = (kAΔT)/(L × Lf). Given k = 235 W/m·K, A = πr² = π(10^-3)² m², ΔT = 20 K, L = 0.1 m, and Lf = 3.34 × 10^5 J/kg, the rate can be calculated.

In fresh water, cold melted water from the ice cube is denser than the surrounding warm water, causing it to sink to the bottom. This creates convection currents that bring warmer fresh water up to meet the ice cube, accelerating melting. In salt water, melted fresh water is less dense than the surrounding salt water, so it stays near the surface around the ice cube, insulating it from the warmer salt water below.

The surface-to-volume ratio principle explains why mittens are warmer than finger gloves. A finger has minimal volume and maximum surface area, making it the worst-case scenario for heat loss. At -20°C with 15 km/h wind, a wool finger glove maintains fingers at +2-5°C, while a mitten of identical material, thickness, and weight maintains fingers at +8-11°C—a 7-10°C difference. This principle applies universally: why round igloos are more efficient than rectangular houses, why cylindrical yurts are better than square tents, why animals curl into balls in cold weather, and why a row house needs 50% less heating energy than a freestanding single-family house. The Mongols understood this principle 3,000 years ago when living in the coldest inhabited climate on Earth. The improvised cold survival system consisted of three parts: (1) Thin wool gloves as an inner layer to wick moisture away from the skin, since wet skin conducts heat 25 times faster than dry skin; (2) Oversized mittens as an outer layer, made from blankets, shirt sleeves, or improvised materials, with a cuff to prevent wind from entering; (3) The belly method for rewarming when fingers became numb.

The rate of ice melting is directly proportional to the heat current through the rod, which depends on thermal conductivity, cross-sectional area, and temperature difference, and inversely proportional to the rod's length. When a cylindrical rod with one end in steam (100°C) and the other in ice (0°C) melts 0.1 g of ice per second, replacing it with a rod of half the length, double the radius (quadrupling the cross-sectional area), and one-fourth the thermal conductivity results in a melting rate of 0.2 g per second, as the heat current doubles due to the combined effects of these dimensional and material changes.

Volume scales with the cube of radius (r³), while surface area scales with the square of radius (r²). This means larger objects have proportionally larger interiors relative to their surfaces, while smaller objects have proportionally larger surfaces relative to their interiors. Tiny ice crystals have more surface area per unit volume than larger ones.