8-1. 8-2 8-3 8-4 8-5 8-6 alluvial fan 8-7 delta
TRANSCRIPT
![Page 1: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/1.jpg)
8-1
![Page 2: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/2.jpg)
8-2
![Page 3: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/3.jpg)
8-3
![Page 4: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/4.jpg)
8-4
![Page 5: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/5.jpg)
8-5
![Page 6: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/6.jpg)
8-6
Alluvial Fan
![Page 7: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/7.jpg)
8-7
Delta
![Page 8: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/8.jpg)
8-8
Which stream is more likely to be “Seasonal”?
![Page 9: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/9.jpg)
8-9
![Page 10: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/10.jpg)
8-10
![Page 11: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/11.jpg)
8-11
![Page 12: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/12.jpg)
8-12
![Page 13: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/13.jpg)
8-13
![Page 14: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/14.jpg)
8-14
![Page 15: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/15.jpg)
8-15
![Page 16: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/16.jpg)
8-16
![Page 17: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/17.jpg)
8-17
![Page 18: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/18.jpg)
8-18
Insurance Companies & HomeownersStudy historical “Peak Discharge”
Discharge determines area to be floodedUse Recurrence Interval Equation
Allows you to “predict” floodingWhy is it getting worse?
![Page 19: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/19.jpg)
8-19
Recurrence Interval (RI) = (N+1)/MN= number of years of dataM=magnitude of the event
This equation allows you to predict frequency of flooding events
![Page 20: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/20.jpg)
8-20
![Page 21: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/21.jpg)
8-21
![Page 22: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/22.jpg)
8-22
![Page 23: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/23.jpg)
8-23
Type of Precipitation eventGround ConditionsVegetation Cover
![Page 24: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/24.jpg)
8-24
Removal of VegetationDestruction of WetlandsConstruction ActivityUrbanization
![Page 25: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/25.jpg)
8-25
Flash Floods (Upstream Floods)Smaller StreamsSteeper SlopesShorter “Lag Time”Little or No Warning
![Page 26: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/26.jpg)
8-26
![Page 27: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/27.jpg)
8-27
Downstream FloodsWider valley and larger floodplainRegional water from higher in drainage basinSignificant “Lag Time”Time for WarningCovers larger area
![Page 28: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/28.jpg)
8-28
![Page 29: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/29.jpg)
8-29
Build Dams
![Page 30: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/30.jpg)
8-30
![Page 31: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/31.jpg)
8-31Channelization
![Page 32: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/32.jpg)
8-32
Retention Basins
![Page 33: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/33.jpg)
8-33
Erosion Control
![Page 34: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/34.jpg)
8-34Floodplain Management & Wetlands Restoration
![Page 35: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/35.jpg)
8-35
![Page 36: 8-1. 8-2 8-3 8-4 8-5 8-6 Alluvial Fan 8-7 Delta](https://reader031.vdocuments.net/reader031/viewer/2022012914/56649e635503460f94b5fbc2/html5/thumbnails/36.jpg)
8-36