Hydrology

• Hydrologic cycle -- diagram of the hydrologic cycle showing volumes of daily circulation for the U.S.

Runoff Generation

• Subsurface stormflow -- forest in the Blue Ridge with heavy leaf litter and high infiltration rate
• Subsurface stormflow -- stream channel in the Blue Ridge where runoff is generated by SSSF
• Horton overland flow -- intense thunderstorm rainfall
• Horton overland flow -- steep rocky slopes in the desert have low infiltration rates, favoring HOF
• Horton overland flow -- sheetwash and rilling in the badlands of South Dakota
• Horton overland flow -- sheetwash and gullying in uplifted lake sediments in Death Valley
• Horton overland flow -- sheetwash and gullying on strip mine debris, Illinos
• Horton overland flow -- sheetwash erosion in overgrazed area, New Mexico
• Horton overland flow -- effects of overgrazing and trampling, Marin Co., California
• Saturation overland flow -- area in valley bottom generating SOF. Upper South Branch Lone Tree Cr., Marin Co., CA
• Saturation overland flow -- variable source area generation of SOF. Another view of Upper South Branch Lone Tree Cr., Marin Co., CA
• Saturation overland flow -- gully headcut showing position of water table and hydrophilic vegetation, Upper South Branch Lone Tree Cr., Marin Co., CA
• Saturation overland flow -- variable source area generation of SOF, hillslope west of Fort Seward, Humboldt Co., CA
• Saturation overland flow -- variable source area generation of SOF in golf course
• Saturation overland flow -- flooding of variable source area in golf course above

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