water
What-if water dashboards
Interactive models of real water bodies. Each one is built from public USGS data, runs entirely in your browser, and answers a simple question: what happens to the water if the inflows or diversions change?
gsl ↗
Great Salt Lake
Utah, USA · 1949–2026
The largest salt lake in North America, and the last stop on the Colorado River's journey west.
bear-river ↗
Bear River
Utah, USA · 1949–2026
The largest tributary of the Great Salt Lake. Its flow is diverted in the Box Elder Valley before reaching the lake — drag the diversions to see what actually arrives.
sevier-river ↗
Sevier River
Utah, USA · 1949–2026
Flows into Sevier Lake, a terminal lake that mostly evaporates; only in wet years does it overflow to the Great Salt Lake. Drag the Sevier Valley diversions to see what reaches the lake.
jordan-river ↗
Jordan River
Utah, USA · 1949–2026
A highly regulated river that flows from Utah Lake through the Salt Lake Valley and empties directly into the Great Salt Lake. Drag the SLC supply and lower-reach diversions to see what arrives at the lake.
weber-river ↗
Weber River
Utah, USA · 1949–2026
A Wasatch Range river that irrigates the Weber Valley and joins the Bear River near Brigham City — so its flow feeds the lake indirectly. Drag the lower-reach diversions to see what it delivers to the Bear River.