In this study, scientists investigated how phosphorus (P) is carried away by water during rainfall. They used controlled rainfall on different slopes to see how much P ended up in the runoff and sediment. Results showed that more P was in the runoff at first, then it stabilized. More runoff and sediment were seen on steeper slopes and with heavier rain. The runoff had higher P levels right after starting, which then stabilized. Most of the P traveled through the sediment that was lost.