Nonpoint-source contamination is a substantial threat to ground-water resources. Understanding ground-water vulnerability (GWV) to non-point-source contamination is necessary to implement best management practices for resource protection and remediation. However, reaching such understanding is often complicated because of the inherent spatial and temporal variability of hydrogeologic properties of the aquifer, land-use practices, and climate change and variability. This book provides an overview of approaches for improved under-standing of GWV and has specific application to the High Plains ...