Interaction (exchange) of surface water with groundwater at watershed, reach, and sediment-patch scales including bidirectional hyporheic flows. Focus on streams and rivers, consideration of lakes. Steady and unsteady exchange hydraulics including laminar and turbulent flows. Exchange benefits and engineering goals including heat transfer, nutrient processing, and contaminant attenuation. Engineering applications including conjunctive use of surface water and groundwater resources and impact of groundwater pumping on rivers. Field methods.

• Describe how key landscape properties impact exchange of water between rivers, lakes, and groundwater.
• Describe the benefits and water budget components of conjunctive use of surface and groundwater.
• Compute river-groundwater exchange hydraulics using numerical models.
• Calculate the impact of groundwater withdrawal on river flows.
• Describe mechanisms and benefits of hyporheic flow.
• Calculate hyporheic flow induced by streambed topography.
• Measure surface water-groundwater exchange in the field.

• Erich T. Hester