Operation Maruva
I pulled a card and it said rewild
No sooner were the living legally recognised, they were dead. Oxygen levels, zero, unable to support itself let alone others. Decades of petitions met not in celebration but in a wooden tombstone hammered into the mud.
No more the microbes that once fizzed unseen. No more the plants that reached for the light and the fish that danced and spawned in the shallows. No more the frogs, birds or beavers, that fed and thrived in the waters. No more the small human livelihoods tied to the river and no more the children playing. All that remained in any profusion were insects. In huge swarms they thrummed and buzzed, an unholy orchestra in symphony above the lifeless water. It wasn’t just the vertical swarms of gnats, you could sit and watch the giant hawker dragonflies with their now iridescent wings, still gossamer thin, now heavy with the chemical overspill. You could sit and watch, if your stomach were strong enough to bear the putrefied thickness of the air. The river itself stank of effluent and decay, dark as pitch and silent, bubbles of hydrogen sulfide rising where life had once stirred.
There was never any one actor that you could easily point a finger at. Massive extraction had hollowed the banks, searching for anything of value. Every inch of marshland had been paved with homes, factories and some core infrastructure you needed to support them. Agricultural run off from the farms had burned the shallows and starved the depths, not to mention the slow poison of a million human bodies worth of waste.
The end came and went; the point of no return a faded headline in the rearview mirror. The naysayers pointed out that life went on, the catastrophe localised, the news, fake. The ecologists wept with the local communities. They wept for the dead and they wept for the gone and then they wept for the living. Amid the grief a group of strangers started talking, some of them began to dream, a few of them began to plan. They started with what could be done by hand, quietly tending the few living pools, nursing whatever life from the river could sustain, they’d squelch attentively from rank area to rank area, rags tied around their faces to reduce gagging, looking for traces of life and flowing water. An unlikely group of all ages from all walks of life, they watched and recorded and slowly a project they dubbed Maruva was born.
We drew our inspiration from the mushrooms and millipedes that once thrived on the riverbanks. The few detritivores and decomposers that still clung to life and slowly chewed their way through the remnants of the water’s ecosystem. None of us engineers, we’d look to the scrap piles, scavenging to build filters from whatever looked promising, but mostly recognising where nature herself was winning. Those notes would go on to become the first draft document, then the first real plans of what Maruva could one day be. Rooted in the human, a vision that worked with fungal beds and cascading water to help bring life back; a vision of human stewardship and care.
We wanted a system that remembered the river’s right to live, something the courts had acknowledged too late and the companies had never paid for.
Over time the rill did grow to become a river but only over time. From the first muddy finger gouging channels in the grubby estuary we also grew. We found many people who wanted to support the work, people with knowledge old and new with the desire to help clear waters flow once more. We started with what we knew, who we were and how we would work together with the land. We drafted documents to share. We fought over grammar and intent and who we would work with and what lines we would draw, we were so righteously imperfect and while we wanted the same outcome, there were times when it felt like our different boundaries would prevent us getting there. There were tears as membership of our small fellowship ebbed and flowed, we were more internally political than a family party, there was shouting and more than once we physically fought, but, we persisted and what follows is the first document we ever ratified earnest, clumsy, urgently necessary.
Vision
Maruva imagines a future in which big tech no longer pretends to be weightless.
River‑Compute is a speculative model for situating AI infrastructure within damaged river systems.
Maruva will treat big tech and associated infrastructure not as a saviour, nor as a neutral tenant, but as a deliberately constrained guest.
Maruva accepts that modern computation draws deeply on water, energy, materials, and attention, and must return value upstream, downstream, and beyond itself.
Maruva believes that if computation must extract, then it must also repair, continuously, visibly, and without claiming redemption.
River‑Compute does not aim to reanimate the dead. Instead, it lowers the cost of life returning by intercepting waste, restoring oxygen, and creating pockets of ecological possibility.
River-Compute is designed to operate under ecological veto, to scale down as rivers weaken, and to prioritise the health of the watershed over uptime guarantees.
Maruva is not built for operating efficiency. Maruva is built for legitimacy and cohabitation.
Values
Humility
Some damage cannot be undone and must be carried responsibly. The river is older than the machine, her ecological thresholds override computational demand.
Conditional Presence
Data centers operate only while ecological conditions allow. Seasonal, climatic, and social limits are respected. Expansion is a privilege, never a right.
Radical Transparency
Environmental data is public, raw, and legible.
Local Reciprocity
Benefits accrue first to the watershed and its communities. Jobs, cooling, power, and restored public space are part of the system. Shareholders are secondary.
No Net‑Positive Claims
The system does not claim to be regenerative by default. Repair is partial, ongoing, and contested.
The work is never finished.
Social Contract
We are developing a river first operating charter. Ecological metrics must override service level agreements. That is the core tenet.
We will build public dashboards. Water temperature, dissolved oxygen levels, flow rate, ecological status and chemical status.
We will build together. Civic coownership through a local trust with veto power over change, expansion and development. Communities can halt or reverse growth.
Compute exists by permission, renewed continuously, entangled in the local ecosystem, bottom of the food chain.
In closing
This is not a blueprint for salvation. It is a refusal to pretend that advanced technology can remain innocent while benefiting from damaged worlds. It is a story about people and machines that slow down so rivers can breathe, and about institutions that accept limits not as failure, but as maturity.
We cannot change the past, but we can imagine a future that is not necessarily clean, but, is careful.
We shared it in all it’s pompous ambition and glaring imperfection. We shared it impatiently before we understood it. We believed in the vision and were desperate to give back. We hoped that in giving back we might find forgiveness and a chance to breath again.
“Two degrees delta. This, this is a fantasy. Unworkable. Two degrees delta? Come on. We might as well give up now if you cannot be flexible, just somewhere on something,” he stuttered, frustration spilling over. “The most, the absolute most, the best most cautious teams operate in a three to five window, not two. Rather than an impossible mission, why don’t you try telling the others to work something out?”
Zed put their head on the desk before replying.
“Do you think it is always like this? It is an exhausting uphill struggle of an impossible mission. That’s exactly what it is. You’re right to be frustrated. We’re all doing the impossible, you have to do the impossible. I am trying to make it sound like that is ok, but it isn’t. It’s not, but I don’t, it’s not.”
A pause. A breath.
“Of course, it’s what we signed up for, it’s what we put our names against, so, let’s say two to four and we’ll see how much the green tweakers freak out. What do you say?”
“She was a big river,” his speech cautious, “but her flow is bugged out, we’ll need to work out how to get the flow we need, maybe, maybe even a small dam”
Zed’s head snapped up “No! Absolutely not! A dam, come on Boris, frustration is one thing, but that’s against everything!”
“Yeah ok ok, just thinking out loud, if I talk when I think, I’m going to say some stuff that is out of line, and then…“ He paused. “Let me walk it back. So typically we’d use some physical control structures to enforce flow rates, but that’s how we got here, and she’s not going to flow faster than she wants to flow, so we have to work with what we have, yes, ok.”
“So, “ he continued, “we either need to extract more heat, or turn the farm right down, like right down, or, or we work with more heat in the outflow.”
The corners of his mouth twitched up “I know which I’d choose.”
“Yes, yes, we’ll need a proper technical specification for the grants, but this is what I have so far. I did the work, I’ve run it through the research models, and it could work. To be honest that is a miracle already. I’ve got notes and technical details to share, but I think we can start the discussion here. There are trade offs, it is minimally invasive, but we cannot build a filter or a weir without some, hmmm, landscaping, but it’s small. Smallish. Now we just need the owners to agree to operating at the highest efficiency we can achieve, meaning a slightly throttled output for their customers, but, that should be easy to sell, right? I think it’s good, I’m proud of it, sorry I’m rambling, er, here this is it. Or well, you know the shape of it, for you guys! Here we go.”
Boris projected the document from his laptop onto the canteen wall. Bits and pieces of the design had been discussed in different groups, but he’d pulled the notes together into one document and, in places, added rough diagrams. There was a tension in the room, eased slightly by Boris’s disarming anxiety.
Technical Design (Current Considerations)
Preamble
We have designed a system that can be affordably built with constraints based on the geographical location of the river, the AI hyperscale data center and the pollution hot spots We have designed at the fringes of, but within the boundaries of today’s best technologies, considering as many ethnobiological impacts as we could conceive. The design is built to live up to the vision and values of Maruva, costs and concessions are documented in Annexes A through C.
This document avoids embellishment, it is living only in the sense that it will be updated, beyond that it is a technical resource alone.
River Intake & Filtration (Waste Interception Layer)
In order to reduce biological and chemical load before water is used for cooling, in order to avoid rapid degradation of infrastructure, increase thermal efficiency and lowering downstream oxygen demand.
Stages:
Gross Solids Removal
Bar screens and drum filters
Plastic, debris, and trash capture
Biological Load Separation
Settling tanks / lamella clarifiers
Anaerobic digestion of high‑BOD sludge
Mycoremediation Digestate Stage
Fungal beds using local robust saprophytic species. Pestalotiopsis Microspora is already flourishing, final design will be adapted from the local environ to create a layered semi-competitive supportive bed
Breakdown of complex organics and pharmaceuticals
Immobilisation of heavy metals
A cross‑section of the fungal bed is sketched in thick marker. Layers are labelled in uneven handwriting: “leaf litter,” “local saprophytes,” “P. microspora (already here!),” “gravel substrate,” “slow‑flow channel.” Someone has circled the fungal layer three times and written: “THIS is the magic, DON’T overengineer.” Another note, in a different pen: “Need to check with the myco folks, is this too competitive?
Outputs (see below):
Biogas
Stabilised digestate
Mycelial biomass for non‑structural materials
Digestate Output Economy (Constrained & Local)
Biogas
On‑site power and heat reuseMycelial Composites
Insulation, acoustic panels, non‑structural building elementsSoil Amendments
Restricted use for reforestation and phytoremediation only, after testingMeasured Ecological Credits
Based on verified BOD reduction and waste interception (ReFi‑aligned, non‑speculative)
Chemical Residue Handling
We are never finished principle applies here, a very specific constant monitoring of these values to drive our annual performance metrics.
Tiered Disposal Strategy:
Recovery
Carbon regeneration, solvent and metal recovery where feasibleStabilisation
Encapsulation in inert geopolymer matricesFinal Disposal
Licensed hazardous waste facilities or vitrification
Cooling System (Open‑Loop)
Open‑loop river water cooling via isolated heat exchangers
Strict temperature delta limits (e.g. 2–4°C)
Seasonal throttling and emergency passthrough fall back mode
Cooling scaled down during low‑flow or high‑stress periods
A block diagram shows the cooling loop running through a rendering of a simple data center: river intake → heat exchangers → outflow.
The temperature delta is marked “2–4°C” in bold. Someone has drawn a big angry arrow pointing to it with the note: “Boris wants 5°C !NO!” Another hand has added: “We can negotiate 4 if flow improves.” A third, smaller note: “River veto applies.
Oxygenation & Thermal Mitigation
Hybrid Approach:
Ceramic fine‑bubble diffusers:
High‑efficiency dissolved oxygen transferCascade weirs:
Passive aeration, cooling, turbulence, and public visibility
A rough pencil sketch sits in the margin, clearly drawn by someone who isn’t an artist. A stepped cascade is shown from the side, water tumbling down each shelf. Someone has scribbled “too steep???” next to the top tier, and another hand has added “Zed says: make it gentler, river won’t like this.” At the bottom, a note reads: “Public space here. Benches? Moss beds?”
Note: Cascades are less efficient but provide excellent habitat and are designed to be both functional and beautiful. Places where the river is seen to breathe.
Ecological Seeding & Succession
Initial seeding with selected non‑toxic algae and diatoms
Limited intervention flow regulation to prevent stagnation
Night‑time aeration to offset algal respiration
Gradual introduction of periphyton and microfauna
Fish only introduced once oxygen and nutrient stability is proven
Note: 24 hour biodiversity monitoring in place to track natural evolution of the watercourse pre and post datacenter. In this way we support natural succession, not forced, short term or instant restoration.
It wasn’t the standing ovation he was looking for but there were smiles all around and even the snarks came wrapped in good cheer.
“Nice diagram, what’s a saprophyte again?”
“Benches, top of my agenda!”
“Boris, overengineer, never!”
He powered the projector down, the buzz of the cooling fan continued in the summer heat. Folding his arms he adopted his serious pose, “of course, the real work starts here.”
The grant money secured and a letter of intent from Nile we got to work. The team had metamorphised, turns out there are ways of doing things that governments and large corporates expect, but, our core Maruva team was still leading the way, our charter still stood.
The fungal beds came first. Their spores had found a hold in the damp. In the soft mulch of death and decay they thrived. We had to help the river flow if everything was going to come together, and they were in the driving seat. They had worked without direction or coercion, digesting what the river could no longer carry away.
The different fungus were fussy, like, cutting the crusts of soft white bread fussy. We were trying to introduce local kin, but they were saying no thank you. We searched and we had to expand our search. We worked with leading mycologists, we made concessions, it was imperfect but it was local and we found the species that we hoped would kickstart the whole ecosystem.
We’d encouraged a tough structural species to keep the community embedded through the changing seasons, a team of metabolisers to do the dirty work, and an apex dynamo, a dynamic all purpose responder to react as conditions along the estuary evolved.
This mycelial consortium established we realised how little we had to do. The barren land needed shade, the sun baking it into infertility, and this need grew as the beds extended into the waterways. Occasional channels delicately dug and living support structures both to prevent drowning as the river began to move again.
Of course Boris was always there, ready to lend a helping hand. “At what point do we label this intervention? If we just used a polymer here, it would last a lot longer.” He’d wait. “What, no?”
The beds thickened, then thinned. They travelled. Our core species remained, as new species joined them. The river crawled and nutrients started to flow, downstream, upstream and into the surrounding land. Some components broke down, others assumed the role, there was never a failure but often a redistribution as a new normal was slowly established. Throughout we watched, measured, recorded and shared, reporting back on our progress. Progress, slow and tangible to the communities along the river, carefully charted for our benefactors.
One morning I caught a cormorant, wings spread windmill-wide, intently watching the river. She couldn’t have caught anything that day, it was too early, but my heart knew that one day her hatchlings would feast in this once miasmic paradise.
Looking back dispassionately I’d say that naivety was our greatest weapon against the gradual destruction of our homeland. Stubborn, resourceful, dynamic, smart: where they existed, they were useful. Had any of us known what we were getting into when Boris said - the work starts here - I think we would have sadly sat back and accepted our lot. I lost sleep, I cried more than I care to remember now, so many things didn’t work out the way we had dreamed. Funding was given, then pulled away when the results were not quite what was wanted. A new government who called us green washers came and went. The water got too hot and the algae asphyxiated the fish. Some fungi got out of control and started eating what they shouldn’t. Lawyers upon lawyers upon lawyers, all trying to wiggle free of the contracts we’d created. But our charter held, and I live here not far from where the outflow cascade meets the river.
Ten years deep, a wonderful irony is that it is coming together, our work, the land’s dogged persistence, we’re seeing real results. That’s not ironic, not at all. The irony is that as Maruva matured, as the ecosystem evolved beyond our plans, Nile throttled the datacenter and got better outcomes anyway. That over time the systems changed allowing us to cool more requests with less water. And the real twist, not at first, but now, Maruva is integrated and Nile are right there with us. We live in symbiosis, if not thriving, certainly more than surviving, our charts are their charts. We may not be the best, the job remains, incomplete, but we made the first furrows and now others follow.
I come to this bench, and write. I watch her wend her way down towards the sea, she is looking healthy. It’s warm, you’d think about swimming in her, her flow’s not too fast, but we’re not quite there yet, she’s still in intensive care. If you drank her waters, you’d be there with her. Next year we’re bringing some muskrats cross country, we hope they like it, maybe they will remember it was their home once.
Five more years, I tell myself. Then they’ll be back, wings outstretched, bellies full of fish. Five more years and I’ll be right here waiting.
Glossary
This glossary is provided for reference and is not part of the narrative.
Biogas:
A potentially explosive, environmentally friendly energy source produced in the breakdown of organic matter.BOD:
Biochemical Oxygen Demand
A measure for how much oxygen is consumed by aerobic bacteria growing on the organic material present in a water. You want this number to be low.Detritivore:
Something which feeds on dead organic matter.Giant Hawker:
A large species of dragonfly. Its presence generally indicates moving, oxygenated water rather than stagnant conditions.Knave of Chalices:
”One of the most important meanings within the Page of Cups is that you should be open to new ideas, especially ones that stem from intuitive inspiration. The card seems to state that such inspiration should be embraced, despite it being something that you may not expect. It could lead you to adventure and open many doors. If it is a calling of a creative nature, for example, one to get into music or art, there's an especially strong push from this card to go for it.”Lamella clarifiers:
A type of sedimentation tank that uses a series of inclined plates to separate solid particles from liquidMaruva:
The name given to the river restoration and cooling project described in the story. It has familiar sounds in it, they probably mean what you think they mean.Mycelial Composites:
Mycelium composites present a sustainable biodegradable alternative to conventional materials with uses in packaging, building and fashion.Mycoremediation:
“…a form of bioremediation: using enzymes produced by mushrooms, instead of bacteria, to break down pollutants and restore balance to the ecosystem.“
Check this out: MycoremediationPestalotiopsis Microspora:
Check this out: The Platstic Eating MushroomsSaprophytic:
The process whereby organisms obtain nutrients directly from dead organic matter or wastes.