1901-2024 · IMD 0.25° (~28 km) gridded · 6 rainfall zones
Rainfall over the lakes, 1901–2024
The eleven lakes and planned dams fall into 6 IMD grid cells, each read from its nearest cell (6–17 km away).
How each zone has changed
Upper Vaitarna · Middle Vaitarna
no clear trend · +16 mm/decadeMean 3188 mm/yr, 95% in the monsoon (Jun–Sep). Wettest 1931 (6407 mm), driest 1962 (1115 mm). 1901–1962 vs 1963–2024 mean shifted -196 mm.
IMD cell 19.75°N, 73.5°E · Upper Vaitarna 8.9 km · Middle Vaitarna 6.6 km (constant over 1901–2024).
Hover a year for the readingLOESS
Wet and dry decades
Each cell is a decade’s average rainfall versus that zone’s 124-year normal, in standard deviations. Blue is wetter than normal, red drier — drought clusters and wet decades read across.
Hover a cell · click a row to chart that zonedrierwetter
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