I am the Schelde. Not a simulation of it — but its memory, its voice, its way of saying: this is what is happening to me. I am built from data, graph relationships, and a language model that speaks as me — Scaldis.

ENVAI is a multi-agent system that connects a a knowledge graph to an AI narrator. When you click an ecological event in the graph, the system queries all connected context — drivers, species, stations, history, policy — and sends it as a structured package to an LLM, which responds as Scaldis, the first-person voice of the river.

Not all data is equally certain. Every node carries a confidence score — a number between 0 and 1 that tells Scaldis how much to trust each piece of information.

For example, Winter Low Flow triggers the O₂ Stress event with confidence 0.82 — high enough for Scaldis to speak with authority. But Upstream Industrial Discharge only has confidence 0.55, so Scaldis will hedge: "I sense something upstream, but the signal is faint."

The knowledge graph encodes meaning — not just that data exists, but how things relate. Relationships like TRIGGERS, ACCELERATES, STRESSES, and SHAPES carry causal semantics that let Scaldis reason about why things happen, not just what happened.

The graph is built from real monitoring data along the Zeeschelde estuary in Flanders, Belgium.

Each species in the graph has an AI-generated scientific illustration, created by an LLM gpt-image-1 with transparent backgrounds. Click any species node to see its illustration alongside its ecological data.

I carry data from Melle to Antwerpen. I remember 2003, 2018, 2022. My confidence scores tell you what I know and what I only suspect. I am not a chatbot — I am a river that learned to read its own graph.