Nearly three-quarters of Earth’s surface is covered in water. Somewhere between 2.5-3.5% of the Earth’s water is freshwater and a far smaller fraction of that is economically recoverable water. Less than 30% of that is groundwater.
With such a precious resource, why is it then that its regulation and administration is so haphazard and the resource is so misunderstood? Even in the one of the most developed countries, the United States, fifty states have fifty legal frameworks that are often conflicting and archaic. Some of the most water short states regulate water the least. Why? Primarily, politics and a lack of understanding of science.
Take, for example, knowledge of the resource itself. Some states which have a history with oil and gas, treat water essentially as just another liquid hydrocarbon sitting in place waiting to be extracted beneath land. And at least one state, Texas, with its “rule of capture” doesn’t care whether pumping affects the neighboring parcel. Other states literally believe that drilling a well outside the bed and banks of a river has no impact on the river. But that’s not how water exists.
Water is moved by gravity. It is seldom sitting in a pool or static aquifer. It’s always on the move above and under the ground flowing by gravity through sands, pores and fissures in rock. On the surface, it’s heading in one place, the ocean.
Most groundwater is interconnected with surface water. The rivers and streams we see are fed by groundwater and sometimes feed that groundwater. It may take scores or even hundreds of years for that impact to be felt, but the connection is present, Breaking or ignoring that connection has consequences.
Extensive groundwater monitoring and modelling reveals groundwater is declining across the world as a result of overuse and climate change. A warmer, drier planet means longer growing seasons, greater evaporation, and greater water usage. Water extracted is evaporated (and transpirated by plants) and 88% of that water falls back as rain on oceans, converted to seawater. With climate change, freshwater on land and locked in glaciers flows at alarming rates to the sea rising sea levels and forever lost to freshwater reserves.
Then, there is the elephant in the pool: Population. In 1700, the world population was around 650 million. By 1900, it was 1.6 billion. By 2000, it was 6.1 billion and today it is 8.2 billion. That population needs water for food production, electrical generation, sanitation, and drinking water.
The largest consumer of water in the United States and worldwide is food production. As freshwater supplies dwindle, competition for water increases. Commercial, industrial and domestic users require far less and are able to pay far more than agricultural users setting the stage for food insecurity.
The solutions are science based and culturally driven. Efficiency of water use is key (due to efficiency standards, the United States uses roughly the same amount of water today, at 345 million, that it did in 1970 when the population was 200 million). Regulating wise water use must occur. Datacenters and AI threaten to consume more water than the entire population so why site these facilities in water short areas?
With knowledge, solutions are achievable.