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Water·applied

Water Storage

Why it matters

Rain keeps its own schedule. It falls in bursts: days of downpour, then weeks of nothing. A site without buffering runs dry between inputs even when the annual total is generous. That is the quiet finding behind most "water-scarce" homesteads: the deficit is rarely water. Storage is what runs short. In a freezing climate the problem doubles, because the months when stored water matters most are exactly the months when an unprotected tank turns into a block of ice. With storage solved, autonomy becomes arithmetic. The rest of the chain, collection and treatment, meets its limit at this one link. Storage is also what resilience physically looks like: cubic metres you control, indifferent to grid failures, dry seasons, and supply chains.

Role in 001's holistic picture

Storage is the buffer organ between the harvest and treatment. It is sized not by averages but by scenarios: the quiet week, the winter crew, the festival. Its living sibling is the pond, which stores technical water while hosting life. And its slowest, largest form is not a tank at all: soil that absorbs rain instead of shedding it is the site's biggest reservoir (sustainable landscapes).

The options

A ladder of options, each with a freeze strategy. Food-grade IBC tanks: modular, cheap, proven. Above ground they freeze through, so they need frost-protected enclosures. Earth-covered spaces (the traditional root cellar) hold water liquid all winter without energy. Underground reservoirs are limited only by effort and resources. A community can build one itself: excavated pit, concrete floor, block walls, potable-grade lining. Its volume equals whatever you are prepared to dig. Elevated insulated tanks (3–10 m³) add what the others lack: gravity. Three to five metres of height gives 0.3–0.5 bar. That is enough for basic fixtures with no pump, through any power outage.

The underground rung of this ladder is old knowledge in the world's drylands. In the Thar Desert of Rajasthan, GRAVIS has revived the taanka, a covered underground rainwater cistern of roughly 20,000–25,000 litres. That volume is enough to see a family through the dry months. The cisterns are built together with desert villagers; GRAVIS reports thousands built, serving over 100,000 residents. The storage, not the rain, was the part that had to be engineered.

The same rung works at the scale of a whole capital. Vienna's drinking water has flowed by gravity from Alpine springs since 1873: not one pump along the route. The city is now expanding its underground reservoir at Neusiedl am Steinfeld in two phases, from today's 600 million litres to roughly one billion, a full million cubic metres. On completion it becomes the world's largest enclosed drinking-water store, and the water will pass through the new chambers just as pump-free. Vienna's answer to climate change repeats the desert family's: the water already exists; the buffer is what gets engineered.

How 001 engages with it

Our working storage is VodaLab at Tepla Gora: a repurposed stone root cellar (пивниця) holding 9 m³ of food-grade IBC tanks. Stone and earth alone keep it above freezing in winter and cool in summer. It is the backbone of the community's daily supply. That same room also defines the current bottleneck: 9 m³ is two to three days of water when an event is running, and the cellar is full. Our published strategy works the expansion question honestly. More IBCs first need another frost-protected structure. Once earthworks start anyway, a 30–50 m³ underground reservoir built with the same methods as the community's septic may beat another cellar of plastic cubes. A builder's estimate will decide. An insulated water tower completes the ladder: a small gravity-fed daily buffer that keeps taps alive when pumps have no power.

At House 001, above-ground tanks freeze through in winter and hold only weeks of supply. That is exactly why the natural pond study exists: a deep pond keeps a liquid reserve under its own ice, a property beyond the reach of any practical above-ground tank. What that winter reserve would actually serve is one of the study's open questions: pond water stays technical-tier.

Maturity: applied. VodaLab operates year-round; the expansion options are designed and awaiting cost estimates.

Further reading