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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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What a "100-year flood" actually means

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Mariposa Brook near Little Britain Water Level

Live river level, flow, historical records and forecast for Mariposa Brook near Little Britain in Canada, ON, Canada, built from official government gauge data.

About Mariposa Brook near Little Britain

Mariposa Brook - a vital tributary of the Scugog watershed.

Mariposa Brook flows gracefully near Little Britain in Ontario, Canada, encompassing a vital part of the Scugog watershed. This river, with its catchment area of approximately 186 square kilometres, plays an essential role in the local hydrological network, contributing to water levels in both the brook itself and the adjacent Lake Scugog.

The watershed context

The Scugog watershed, which includes Mariposa Brook, is characterized by its snowmelt-driven seasonal hydrology. As the spring thaw occurs, typically in late April to May, water levels in the brook rise significantly during the freshet, replenishing the surrounding areas. This significant influx supports both aquatic and terrestrial ecosystems. As summer approaches, natural evaporation and low inflow lead to a gradual drawdown in July through September, resulting in lower water levels as the brook transitions into the drier months of the year. Early winter brings another decline as ice forms, marking the seasonal rhythm that defines the region's hydrological patterns.

Why the data matters here

Monitoring the water levels of Mariposa Brook is crucial for understanding local conditions. Today's reading from the Water Survey of Canada indicates how current measurements compare against the historical median for this calendar day, allowing residents and stakeholders to gauge whether water levels are above or below average for this time of year. This context is vital for various users, including farmers, cottagers, and those engaged in recreational activities. With 43 years of historical data available, users can gain insights into trends and make informed decisions based on the river's behavior, ensuring they respond appropriately to the natural fluctuations of Mariposa Brook.

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