GEOL 108 - Crises of a PlanetLab 8 - Rivers and Flooding

Oct. 23 - 26, 2012

Department of Earth Sciences

Department of Earth Sciences

SURVEY RESULTS | 2

SURVEY RESULTS

20%48%

30%

2%

How clearly did your TA answer questions?

Extremely clearlyVery clearlyModerately clearlySlightly clearly

9%

50%

39%

2%

How difficult are the weekly quizzes?

Extremely dif-ficultDifficultJust RightEasy

Department of Earth Sciences

SURVEY RESULTS | 3

SURVEY RESULTS

61%16%

23%

I've used Ben's website

YesNoWebsite?

Music suggestions

Don't change

Rap, hip hop

K pop/J pop

Similar style, dif-ferent artist

Country

Jazz

Motown

Other

“Other” included Ziggy Marley, Gangnam Style, Spice girlsss, ROCK and roll (get it?), House, Queen, Dubstep.. not, and Metal.

Department of Earth Sciences

SURVEY RESULTS | 4

SURVEY RESULTS

Most popular animals were lion and tiger. Unusual answers included Mick Jagger and a liger.

Spirit Animalsmammals (wild)

mammals (domestic)

birds

Water creatures (non-mammal)

Water creatures (mammal)

Don't know

I hate animals

Hot Rod quote

Pokemon

Favorite Pokémon (by type)

waterfireelectricnormalflyingpsychicgroundbugice

Department of Earth Sciences

REVIEW | 5

QUIZ 6 REVIEW

Describe the two ways in which fire can enhance the probability of mass wasting. What was the non-porous wood board an analog for in the sand experiment?

How do small amounts of water affect slope stability when compared to large amounts of water?

http://clearscience.tumblr.com/

Bonus: What two elements is steel usually made of?

Department of Earth Sciences

RIVERS AND FLOODING | 6

LAB 8 - RIVERS AND FLOODING

Plitvička

Department of Earth Sciences

RIVERS AND FLOODING

| 7

STREAM GENESISTime 1

Time 2Time 3

Department of Earth Sciences

RIVERS AND FLOODING

| 8

STREAM TYPES

Meandering Braided

http://en.wikipedia.org/wiki/File:Waimakariri01_gobeirne.jpghttp://en.wikipedia.org/wiki/File:Rio-cauto-cuba.JPG

Department of Earth Sciences

RIVERS AND FLOODING

| 9

STREAM EVOLUTION

• Point bars • Cut banks• Creation of oxbow lakes

Department of Earth Sciences

RIVERS AND FLOODING

| 10

STREAM EVOLUTION

• Stream paths move naturally over time• Sometimes at odds with modern settlements

Department of Earth Sciences

RIVERS AND FLOODING

| 11

FLOODS

• Floods are a natural process• Floods add nutrients to soil

Department of Earth Sciences

RIVERS AND FLOODING

| 12

FLOODS

Department of Earth Sciences

RIVERS AND FLOODING

| 13

FLOODS

• Levee and earthen dam failure

Department of Earth Sciences

RIVERS AND FLOODING

| 14

FLOODS

• Leaking weakens reservoirs• Example: Taum Sauk Reservoir in Missouri

National Agriculture Imagery Program (NAIP), USDA

Department of Earth Sciences

RIVERS AND FLOODING

| 15

FLOODS

• Taum Sauk Reservoir failed, more than a billion gallons emptied in 30 minutes

Department of Earth Sciences

RIVERS AND FLOODING

| 16

Baldwin Hill Reservoir Failure, 1963

Sanders et al., 2010

Department of Earth Sciences

RIVERS AND FLOODING

| 17

Baldwin Hill Reservoir Failure, 1963

Sanders et al., 2010