Agricultural land use degrades water quality and reduces wildlife habitat, but drainage water management (DWM) can alleviate those impacts. With DWM, farm fields are seasonally flooded to create wildlife habitat and to retain nutrients on the field. Although DWM is an approved practice by the Natural Resources Conservation Service, its effectiveness for water quality has not been examined in the Pacific Northwest or in similar climates. DWM improves habitat for migratory waterfowl in Washington state. If it also improves downstream water quality without impacts on agriculture production, then natural resource managers may want to implement it more extensively. We propose to use the DRAINMOD and DRAINMOD-N models to examine the effects of DWM on nutrient loads and crop yield in three farms in Washington, which currently use DWM for farm and wetland rotations. In addition, we will measure the effects of DWM on water temperature. We will communicate the results directly to Ducks Unlimited and the Washington Department of Ecology, both supporters of this project. The proposed research will support 2 graduate students, who will gain experience in interdisciplinary research and working with agencies.