a4cd9922ab774bb324b453fb52bcab0c.ppt
- Количество слайдов: 93
River Systems
I. Water Distribution 1. 36 billion cubic km of water 97. 2% oceans 2. 15% glacial ice 0. 65% lakes, streams, ground water
II. The Hydrologic Cycle 1) Precipitation
The Hydrologic Cycle 2) Evaporation-Transpiration
The Hydrologic Cycle 3) Infiltration
The Hydrologic Cycle 4) Runoff
The Hydrologic Cycle 5) Runoff
III. Stream Flow A. Terms
III. Stream Flow A. Terms 1. Laminar vs. Turbulent
III. Stream Flow A. Terms 1. Laminar vs. Turbulent
III. Stream Flow A. Terms 2. Velocity, Area, Discharge
Water Velocity
Area
Discharge
Discharge = Velocity x Area
Discharge = Velocity x Area Q = V x A
III. Stream Flow A. Terms 3. Gradient
III. Stream Flow A. Terms 3. Gradient Rise = Run Vertical drop of the stream Horizontal Distance
Rise = Run Vertical drop of the stream Horizontal Distance
III. Stream Flow B. Downstream Trends 1. gradient 2. width and depth 3. discharge 4. velocity
III. Stream Flow B. Downstream Trends a. gradient b. width and depth c. discharge d. velocity
III. Stream Flow B. Downstream Trends a. gradient b. width and depth c. discharge d. velocity
III. Stream Flow B. Downstream Trends a. gradient b. width and depth c. discharge d. velocity
III. Stream Flow B. Downstream Trends a. gradient b. width and depth c. discharge d. velocity
III. Work of Running Water A. Erosion
III. Work of Running Water 1) Sheet flow A. Erosion
III. Work of Running Water A. Erosion 1) Sheet flow 2) Rill flow
3) Stream (gully) flow
III. Work of Running Water B. Transportation 1) dissolved load
B. Transportation 1) dissolved load 2) suspended load
B. Transportation 1) dissolved load 2) suspended load 3) bedload
Bed load – – Rolling – Sliding – Saltation
Saltation
IV. Features of Streams
IV. Features of Streams A) Waterfalls and Rapids
IV. Features of Streams B) Meanders
Cutbanks Pointbars
IV. Features of Streams C) Pointbars
IV. Features of Streams D) Cutbanks
IV. Features of Streams
IV. Features of Streams E. Oxbow lakes
IV. Features of Streams E) Oxbow lakes
IV. Features of Streams • Oxbow lakes (Cont’d)
IV. Features of Streams • Oxbow lakes (Cont’d)
IV. Features of Streams F) Braided Streams •
G) Natural Levees
IV. Features of Streams H) Deltas
H) Deltas
IV. Features of Streams I) Floodplains and Terraces
V. “Other Topics” A) Drainage Patterns 1. dendritic
V. “Other Topics” A) Drainage Patterns 1. dendritic 2. radial
V. “Other Topics” A) Drainage Patterns 1. dendritic 3. rectangular 2. radial
V. “Other Topics” A) Drainage Patterns 1. dendritic 2. radial 4. trellis 3. rectangular
V. “Other Topics” A) Drainage Patterns 5. Deranged Drainage
V. “Other Topics” A) Drainage Patterns 5. Deranged Drainage
V. “Other Topics” B) Stream Piracy
Stream Piracy
Stream Piracy
V. “Other Topics” B) Stream Piracy C) Channelization
Channelization
Channelization
Channelization
Channelization
Channelization Rise = vertical drop Run horizontal distance
Channelization
Channelization
Channelization
Channelization
Channelization
V. “Other Topics” B) Stream Piracy C) Channelization D) Flood hydrograph
Hydrograph A. General
Hydrograph A. General B. Storm Hydrograph
a4cd9922ab774bb324b453fb52bcab0c.ppt