Fracture intersections as integrators for unsaturated flow

Details Fracture intersections as integrators for unsaturated flow Fracture intersections as integrators for unsaturated flow

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29x..44w&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 24, pp. 44-1, CiteID 2191, DOI 10.1029/2002GL015551

Physics

3

Hydrology: Unsaturated Zone, Hydrology: Groundwater Hydrology

Scientific paper

A simple experiment finds that fracture intersections can act to integrate unsaturated flows, such that regular, low flows entering the intersection from above are transformed into large, less frequent pulses below. At low flows, our simple intersection forms two capillary barriers. Water from above pools at the intersection until sufficient pressure builds to breach the barriers and discharge stored fluid. The barriers then reform and the process is repeated. At low flows, the volume discharged from the intersection remains relatively uniform across a range of flow rates. At higher flows, discharge volume is highly variable, and a viscous stabilized non-pulsating regime occurs at the highest flow rate that we considered.

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