The reservoir feeds the Soviet-era North Crimean Canal - a channel which has traditionally supplied 85% of Crimea's water.
Russia had taken measures to alleviate Crimea's water supply problem before access to the canal was restored last year, meaning there was now a certain "margin of safety" however, he said.
Mikhail Razvozhaev, the Russian-installed governor of the Crimean city of Sevastopol, the headquarters of Russia's Black Sea Fleet, played down any immediate threat to water supplies.
"Water supply to the city will not be affected by damage to the Kakhovskaya hydro-electric power plant in any way.
The city uses its own reservoir, water reserves are at a maximum, and there are also reserve sources of water supply," he said on Telegram.
Persons:
Dmitry Peskov, Sergei Aksyonov, Aksyonov, Vladimir Putin, Mikhail Razvozhaev, Vladimir Konstantinov, Andrew Osborn, William Maclean
Organizations:
Kremlin, Russian, Thomson
Locations:
Crimea, Nova Kakhovka, Russia, Ukraine, Russian, Kyiv, Moscow, Dnipro, Salt, U.S ., Utah, Crimean, Sevastopol