The Harris County Flood Control District collected hydrologic data on 1) coastal prairie, 2) pasture land, and 3) developed land in the Katy Prairie region of NW Harris County using in situ monitoring equipment to compare the runoff reduction characteristics between the three land types. This presentation will discuss the background of how prairie came to be regarded as a flood reduction tool, the methodology and results from four years of collected data, and steps taken to improve and continue this research.