According to officials, at least 70 TMC of water is required for kuruvai in Delta region. At present it is planned to cultivate in an area of one lakh acres in Thanjavur, while in Tiruvarur 80,000 acres and in Nagapattinam at least 92,500 acres. When water release from Mettur takes place as per the customary date, the acreage would go up.