The city of Clive, FEMA and the Army Corps of Engineers have partnered to research what future Walnut Creek flooding could look like once most of the watershed is developed, Clive announced Monday evening. Today, almost half of the 83-square-mile Walnut Creek watershed is developed, and over 400 additional acres are being converted each year. Clive makes up 10 percent of the land area in the watershed, but experiences more than 90 percent of the creek’s flows. “We’re seeing rain events now that quickly turn our creek into a massive river,” Clive Mayor Scott Cirksena said. “As our flood risk grows, it’s essential that we keep collaborating with stakeholders throughout the watershed and use the best research to shape flood management strategies.”