A Land Without a Sponge
Cherrapunji, locally known as Sohra, sits on a plateau in the Khasi Hills and holds records for the most rainfall in a calendar month and year. It receives an average of 11,777 millimeters of rain annually. This immense precipitation is the result of monsoon clouds from the Bay of Bengal rising over the Khasi Hills, a process known as orographic lift. The region faces severe water shortages, especially during the dry winter months from November to March. Some residents get water for only a few hours a day and must buy it from private tankers.
The problem is geological and ecological. The plateau is composed of porous limestone and sandstone. Whatever water is not immediately lost as surface runoff drains quickly into subterranean channels. More critically, the landscape has been stripped of its topsoil. Centuries of deforestation have left the ground with little capacity to absorb and retain the monsoon rains. The soil that remains is shallow and acidic in essential nutrients like nitrogen, phosphorus, and potassium. During a heavy downpour, rainwater sheets across the exposed bedrock and compacted earth, flowing immediately into deep gorges and down to the plains of Bangladesh.
An Unraveling Ecosystem
The primary driver of this soil degradation is historical and ongoing deforestation. Traditional slash-and-burn agriculture, known as jhum cultivation, has been a long-standing practice. Historically, long fallow periods of 15-20 years allowed forests to regenerate. However, increasing population pressure has shortened these cycles to just 2-3 years, preventing ecological recovery and leading to severe soil erosion. One study found that shifting cultivation in Meghalaya can cause an average soil loss of 40.9 tonnes per hectare.
Other factors compound the problem. Limestone and coal mining scar the landscape, physically removing soil and vegetation. The constant, heavy rainfall leaches the remaining thin soil of its nutrients, leaving it infertile. This process has transformed much of the area from dense subtropical forest into scrubland or barren grassland. Satellite imagery analysis shows that grasslands now dominate the region (73%), with forests covering only a small fraction (18%). The ecological result is a landscape that, despite record-breaking rainfall, cannot support lush vegetation or store water for the dry season.