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Nibi Metrics

Real-time water levels, forecasts, and alerts for lakes and rivers across Canada and the US. Built on official government data.

Nibi Metrics turns raw gauge readings from official hydrometric networks into something a person standing on a dock can actually use: is the water high or low for today, which way is it moving, and how unusual is this? This page explains where every number on the platform comes from and what we do to it along the way.

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How snowpack becomes summer water

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Flash Flood Alley: how Texas rivers rise in hours

Why Central and South Texas rivers go from gravel beds to fifty-year records in an afternoon - including July 2026 on the Nueces.

What a "100-year flood" actually means

One percent, every year, forever - unwrapping hydrology's most misunderstood phrase, and how it differs from our own percentiles.

Otonabee River near Robinsons Island Water Level

Live river level, flow, historical records and forecast for Otonabee River near Robinsons Island in Canada, ON, Canada, built from official government gauge data.

About Otonabee River near Robinsons Island

Otonabee River - A vital flow in Ontario's watershed.

The Otonabee River near Robinsons Island is a significant waterway in Ontario, flowing through a diverse landscape that supports both local ecosystems and human activities. This river is part of a larger watershed system, which encompasses a substantial drainage area of approximately 7,660 square kilometres, making it a crucial resource for the communities and environments that rely on its waters.

The watershed context

The Otonabee River is surrounded by several notable peers, including Baxter Creek, Jackson Creek, and the Ouse River, which contribute to the river's overall health and hydrology. As a snowmelt-driven river, the Otonabee experiences a pronounced seasonal cycle. During spring, typically from late April to May, the river sees an increase in flow due to snowmelt, which can lead to freshet conditions. This period is essential for replenishing water levels and supporting aquatic life.

As summer approaches, natural evaporation leads to a gradual drawdown in water levels from July through September, reflecting typical seasonal patterns across Ontario. The river begins to decline early in winter as ice forms, marking the end of an active hydrological period. Such rhythms are crucial for maintaining ecological balance and influencing the life cycles of various species that thrive in the area.

Why the data matters here

Today's reading of the Otonabee River near Robinsons Island provides valuable context, especially when compared against the median for this calendar day across the station's historical record, which spans over six years. This benchmark is critical because it offers insight into current water levels relative to typical conditions, guiding local water management decisions and informing residents about potential flooding or drought conditions. Monitoring agencies like the Water Survey of Canada play a vital role in collecting and sharing this data, ensuring that stakeholders can make informed choices regarding water use and conservation efforts.

How this page is built

Readings come from official government gauges and are rolled into daily records: the daily mean, high and low for every day on record. Each calendar day gets its own baseline from the full history, so the level you see is compared against what this specific date usually looks like rather than an annual average.

How Nibi Metrics works · Water stories