ABSTRACT
Geomorphic literature includes many papers describing relationships among groundwater, surface water and evolution of the drainage system. In the past two decades, however, an increasing number of researchers have shown that drainage networks are initiated by and evolve under the influence of near-surface groundwater flows. Movement of water in soils and unconsolidated sediments that constitute the unconfined aquifer of a basin takes place in four paths: surface runoff, shallow subsurface flow, throughflow and groundwater flow. Several authors have described the unique characteristics of drainage networks and valley forms in areas affected by near-surface groundwater and the related sapping and piping processes. A shallow geologic cross section that was constructed from resistivity surveys and shallow boring programs shows that these unique drainage features are developed over a buried stream valley. A field survey was designed to identify the processes that cause the evolution of anomalous drainage features over the buried stream valley.
