NASA-ISRO NISAR · Interactive simulation
You run the water for a farming valley for 24 months. Pump groundwater and the farms earn money, but the ground sinks. Pump too much, and part of that sinking never comes back.
Karapınar (−5.9 cm) is a sub-basin inside Atlas: Konya Plain (rank 1, −9.6 cm / −11.0 cm/100d common) →
One-dimensional Terzaghi compaction: clay springs back while the water stays above its lowest level ever (hpc) and is squeezed for good below it. Specific yield Sy = 0.10; pumping scale k = 0.623.
../data/central_valley/summary.json…24 months later
49.12 mm/km on the California Aqueduct or 57.01 mm/km on the Tulare Canal disrupt gravity flow more than uniform sinking?6.4× faster sinking within 1 km of mapped sinkholes) use 12-day updates without claiming exact collapse dates?Educator Lesson Plan · 40-Minute Lab (Grades 9–12)
Run one of the three 24-month scenarios in one click on the active valley, then use the discussion questions below with docs/story/lesson_plan.md.
57.01 mm/km (Tulare Irrigation District Canal) and 49.12 mm/km (California Aqueduct) disrupt gravity flow more than uniform sinking?6.4× faster sinking within 1 km of 29 mapped sinkholes guide field priorities without predicting an exact collapse date?NISAR data are provisional. Calibration and validation are carried out by the NISAR project (NASA-JPL and ISRO), not by our team.