Historical Subak System
As water rich as Bali may look to the outsider, Bali had been suffering from unprecedented droughts amplified by the extreme groundwater abstraction for the tourist industry. The water stress affects farmers and their vulnerable local communities hardest. During the excursion local nature expert Wayan Sumadi showed us how the ancient Subak (irrigation) system is being undermined as it does no longer provide enough water for the rice farmers. Below you can read more about the Subak system.
https://whc.unesco.org/en/list/1194
Tourism related water stress
The tourism is literary sucking the island dry. 65 percent of the island’s groundwater is poured into the tourism industry, drying up 260 out of more than 400 Balinese rivers. Bali and its inhabitants rely heavily on the tourism industry, making it extremely difficult to tackle and advocate for a ban on groundwater abstraction for tourist accommodations.
In The Asean Post article below you can read more about the impact of tourism on the water supply of Bali.
https://theaseanpost.com/article/losing-our-water-tourism