Ch16_Outline

Ch16_Outline - Chapter 16 Running Water Hydrologic cycle...

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1 Chapter 16 Running Water Hydrologic cycle ± The hydrologic cycle is a summary of the circulation of Earth’s water supply ± Processes involved in the hydrologic cycle Precipitation Evaporation Infiltration Runoff Transpiration The hydrologic cycle Figure 16.3
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2 Sources of Earth’s water Figure 16.2 Running water ± Begins as sheetflow Infiltration capacity is controlled by Intensity and duration of rainfall Prior wetted condition of the soil Soil texture Slope of the land Nature of the vegetative cover Sheetflow develops into tiny channels called rills Running water ± Streamflow Two types of flow determined primarily by velocity Laminar flow Turbulent flow Factors that determine velocity Gradient , or slope Channel characteristics including shape, size, and roughness
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3 Running water ± Streamflow Factors that determine velocity Discharge – the volume of water moving past a given point in a certain amount of time ± Changes from upstream to downstream Profile Cross-sectional view of a stream Viewed from the head (headwaters or source) to the mouth of a stream Running water ± Changes from upstream to downstream Profile Profile is a smooth curve Gradient decreases downstream Factors that increase downstream Velocity Discharge Channel size Longitudinal profile of a stream Figure 16.7
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4 Running water ± Changes from upstream to downstream Factors that decrease downstream
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Ch16_Outline - Chapter 16 Running Water Hydrologic cycle...

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