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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Wahiawa Reservoir at Spillway at Wahiawa, Oahu Water Level
Live lake level, flow, historical records and forecast for Wahiawa Reservoir at Spillway at Wahiawa, Oahu in HI, United States, built from official government gauge data.
- Location HI, United States
- Watershed oahu
- Primary gauge 16210000 (USGS)
About Wahiawa Reservoir at Spillway at Wahiawa, Oahu
Wahiawa Reservoir - a vital water resource on Oahu.
Located in the heart of Oahu, the Wahiawa Reservoir serves as a significant body of water, positioned at the spillway in Wahiawa. This reservoir captures rainfall, a key element in Hawaii's tropical island hydrology, where events can shift quickly from calm to flooding due to intense rainstorms.
The watershed context
Wahiawa Reservoir is situated within the Oahu watershed, which encompasses a diverse range of water bodies including Heeia Stream and Helemano 6 Reservoir. This region experiences a unique hydrological pattern characterized by rainfall-driven flash floods. Rainfall can cause water levels to rise dramatically within minutes to hours, particularly driven by trade-wind and Kona storms. Given the absence of a snowmelt season, the reservoir plays a crucial role in managing the water flow during these intense weather events.
Why the data matters here
Monitoring the water levels of Wahiawa Reservoir is essential not only for ecological health but also for public safety. As part of the U.S. Geological Survey network, current readings provide valuable data for understanding the reservoir's dynamics. Today's measurements are compared to the median for this calendar day across a historical record spanning more than 21 years. This comparison is vital, as it highlights fluctuations and helps predict potential flooding risks or drought conditions, which are critical for local communities relying on this water source. Understanding the context of the current reading in relation to historical data offers a clearer picture of water management needs in this tropical setting.
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
