A study looked at how much water is used in farming in a place called Rechna Doab in Pakistan. The researchers wanted to figure out a way to measure the water balance in irrigation systems there. They studied different models to help them do this. Their work was part of a bigger project to make sure there's enough water for farming in the area. They were able to show how much water goes into the ground and how much gets used on the surface for growing crops. This helps farmers and water managers know how to use water more wisely to grow crops.