Who punished Stanley by depriving him of water?

Stanley Yelnats, the protagonist of "Holes" by Louis Sachar, is punished by the Warden, who deprives him of water. This punishment occurs as part of the harsh conditions at Camp Green Lake, where the Warden uses extreme measures to exert control over the boys and to find treasure she believes is buried in the area. The lack of water serves to illustrate the cruel and oppressive environment of the camp.