What does Joel 3:18 mean?

On that day, the mountains will drip with sweet wine, the hills will flow with milk, and all the streams of Judah will run with water. A spring will come out from the Lord's house and water the valley of acacias. Joel 3:18 - Modern Text Bible

(This is a picture of total blessing and abundance for God's people. Everything will be full of life and goodness.)