In videos that went viral on social media, Vishwas is seen sitting under a red umbrella as diesel pumps run to drain water from the reservoir.
Vishwas told local media the water in the reservoir was unusable for irrigation and he had received permission from a senior official to drain it.
The smartphone was eventually retrieved but wouldn’t start because it was waterlogged.
Authorities later suspended Vishwas after he was widely criticised for wasting water resources.
India is one of the most water-stressed countries and extreme temperatures had led to severe water scarcity, causing crop losses, forest fires and cuts to power.