JERUSALEM — For the first time since 1964, Israel will allow Sea of Galilee water to flow into the Jordan River as part of a rehabilitation project that will cost millions of shekels, the Israel Water Authority said.

The project, which started today, also includes diverting brackish water and sewage that has been flowing into the water source, according to an e-mailed statement.

“The Jordan River is renowned abroad and we must do everything we can to make it something to be proud of again and guarantee that visitors continue to come,” Environmental Protection Minister Amir Peretz said in the statement.

Christian tourists make pilgrimages to a site on the Jordan River east of the West Bank town of Jericho where they believe Jesus was baptized. Kayaking and tubing are also offered on the river, which has been threatened by excessive water diversion and pollution.