Water covers 71% of Earth’s surface and is the dominant agent governing environmental processes....
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Transcript of Water covers 71% of Earth’s surface and is the dominant agent governing environmental processes....
- Slide 1
- Water covers 71% of Earths surface and is the dominant agent governing environmental processes. The rates of human usage of water outpace the natural rates of renewal.
- Slide 2
- Slide 3
- Transpiration above the Amazon rainforest Plant stomata
- Slide 4
- Runoff Enters Channels that Join Other Channels to Form a Drainage System.
- Slide 5
- Drainage Systems Stream is a flowing body of water following a channel. A River is a major branch of a stream system. A Drainage System is a network of channels. The total area feeding water to a stream is the Watershed.
- Slide 6
- Flow A is cross-sectional area (m 2 ). V is flow velocity (m/s). Q is stream discharge (volume/time: m 3 /s). Q = AV Discharge Is the Amount of Water Passing a Given Point in a Measured Period of Time.
- Slide 7
- The amount of water in a rivers watershed increases downstream, with the addition of tributaries.
- Slide 8
- Characteristics of Channels Gradient Discharge Sediment load Base level
- Slide 9
- Running Water Erodes Sediment. Maximum Flow Velocity Suspended Load Bed Load Dissolved Load Ca, Cl, Na, Mg, K
- Slide 10
- Meandering Channel
- Slide 11
- Cut-off meander bends form Oxbow Lakes.
- Slide 12
- Braided Channel
- Slide 13
- Flooding Is a Natural Process in Healthy Streams
- Slide 14
- Floodplain Features
- Slide 15
- Fluvial Landscape Evolution
- Slide 16
- Stream Piracy Base Level Dams
- Slide 17
- Fluvial Sediment Builds Alluvial Fans and Deltas.
- Slide 18
- Delta Terminology