Groundwater flow in sedimentary rock saprolite, and in soils derived from this material, is strongly influenced by sedimentary layering and fractures inherited from the parent bedrock. The main objectives of this study were to determine whether parent bedrock lithology and infilling of fractures and other macropores with pedogenically derived clays and Fe/Mn oxides also play major roles in cont...

It has now been well established that the depth of bedrock is a key parameter in assessing the impact of local site conditions on seismic hazard analysis. Where conventional geotechnical testing like standard penetration test (SPT) or cone penetration test (CPT) requires a far greater cost and manpower to be used for such purposes, geophysical testing like ground-penetrating radar (GPR) and mul...

[1] The age-elevation pattern of thermochronologic data has been used for many years to estimate apparent erosion rates in orogenic settings. Recently, it has been suggested that thermochronologic data for detrital minerals from active river system sediments can be used as an effective proxy for bedrock age-elevation distributions, serving as an alternative method for erosion rate studies. This...

The discharge from most karst springs exhibits a consistent and reasonably predictable response to recharge but few exhibit short-term (‘rhythmic’) changes in flow that are commonly attributed the geometry of feeder conduits action siphons. This paper investigates water system rhythmic episodic due variations two phreatic (Main Rising (MR) Whirlpool (WR)) pass through Speedwell Cavern en route ...

Concerns about potential liquefaction and resulting flowslide type failures at Wickiup Dam in Central Oregon prompted geophysical studies of the left wing dike, studies which included a high resolution seismic reflection survey. High resolution seismic reflection data effectively delineated structures and correlated lithologies to shallow borehole data above the surface of the dipping, basalt b...

A hydrogeologic characterization was performed to evaluate the nature of groundwater flow in an alluvial and underlying fractured bedrock aquifer in the area between an unlined, inactive landfill and a river in southern California. The hydrogeologic characterization was used to enhance the site conceptual model for the site, and to design a bioaugmentation pilot test to evaluate the use of enha...

The dynamics of the Greenland Ice Sheet are affected by surface meltwater reaching base ice, altering ice contact with bedrock. Lack understanding this evolution hampers ability to predict effects increasing temperatures on mass balance. Here we present a unique high-resolution study velocity response melting based data from COSMO-SkyMed satellite campaign over Upernavik Isstrøm (Northwest Gree...