The rapid expansion of pattern tile drainage (PTD) to enhance agricultural production in the Prairie Pothole Region (PPR) has the potential to negatively impact ecosystem services provided by wetlands. To better understand and assess these impacts we will develop a spatial database to provide a regional characterization of areas at risk to PTD. Spatial information in conjunction with existing data and models will be used to make preliminary projections on the effects of PTD on cosystem services such as duck production, water storage and water quality. Spatial information will be used to identify study sites that will be instrumented to quantify and model the effects of PTD systems on wetland hydrology; this information...