ISLAND LAB · INTERNAL, BEHIND THE GATE

Water over time

v0.14 · built 2026-10-04
WHAT THIS IS
River flow at three public gauges, measured daily since 1946.
WHY IT MATTERS
Water security shows as low flow in late summer; flood safety shows as peak flow.
HOW TO USE IT
Read each river's line: is summer flow falling, and how often does it run under its legal flow?
low flow per yeartrend, full recordrecent trendpeak flow per yearsummer days below legal flow

Each year's lowest seven-day summer flow and highest daily flow.

Legal flows are set for fish and often go unmet. Daily averages understate the rule; Nooksack values hold flat between the 1st and 15th.