Flood maps – Modeling a levee break

Slides:

Advertisements

Similar presentations

RIVER DRAINAGE BASINS.

Advertisements

Floodplains & Floods.

Floods Hard and Soft Engineering. Hard Engineering This uses technology, large amounts of money to try and control the river. It can prevent floods in.

Chapter 13 Worksheets Section 1-4.

Section 3: Stream Deposition

CHARACTERISTICS OF RUNOFF

Ch  Know what design frequency means  Know how to delineate a drainage area on a topographic map 2.

Earth’s six water reservoirs Reservoir% Earth's Water% Usable Water Oceans97.54%----- Glaciers2.15%----- Shallow Groundwater0.31%96.9% Fresh Lakes/Streams0.009%2.8%

© 2011 Pearson Education, Inc. Earth: An Introduction to Physical Geology, 10e Tarbuck & Lutgens.

Lecture Outlines Physical Geology, 14/e Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Plummer, Carlson &

Flooding © The GlobalEd 2 Project Photo credit: K.M. Chaudary, National Geographic Flooding in Pakistan displaced 20 million people.

Lecture ERS 482/682 (Fall 2002) Urbanization ERS 482/682 Small Watershed Hydrology.

FLOODS, STREAMS AND MEANDERS. GAUGING STATION On all major streams Measures Stream Height Height vs. Discharge (volume) Flood Stage and height above Flood.

Hoover Dam – Colorado River. Reasons for Dams Flood Control 39,000 dams worldwide higher than 15 m (ICOLD, 1988)

The Hydrologic (Water) Cycle. Surface Water Oceans Rivers and streams Lakes and ponds Springs – groundwater becomes surface water.

Chapter 6.2 The Work of Streams.

Flood management. Flood Management Floods occur when discharge exceeds bankfull capacity. Water leaves channel to cover adjacent land – the flood plain.

Streams and Floods Physical Geology, Chapter 10

Streams and Floods Physical Geology, Chapter 10

Surface Water: Rivers.

Tourism in Extreme Environments The Example of Las Vegas.

Streams and Floods Physical Geology, Chapter 10

Alluvial Fan 8-7 Delta.

Flooding New Orleans, Aug Flooding –Varies with intensity and amount of rainfall –Perhaps the most universally experienced natural hazard Flood.

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.

Impacts of climate change on the Chicago River system.

Floods Week 4. Questions for Homework & Discussion  Would you live in a flood-prone area?)  What level of risk from flooding is acceptable to you? 

Levees Artificial levees prevent floods Usually made with fine-grained sediments that are easily eroded in floods Higher-quality levees mix coarse.

Streams (Rivers). Runoff: H 2 0 that does not sink into ground Most ends up in streams.

Streams and Flooding Chapter 6  Water shapes the earth’s surface  Water also plays a role in human affairs  Floods are the most widely experienced catastrophic.

Streams and Flooding Chapter 6 Water shapes the earth’s surface

A. Hydrologic cycle A. Hydrologic cycle o The hydrologic cycle is a summary of the circulation of Earth’s water supply o Processes involved in the hydrologic.

Floodplains and Floods Key idea: River floods are naturally occurring events that sometimes threaten human populations.

FLOODS. RIVER FLOODS Stream overflows levees Stream overflows levees Most destructive of all geologic hazards Most destructive of all geologic hazards.

 This will occur when streams receive more water than their channels can hold,  i.e. when stream discharge is greater than stream capacity.  Streams.

© 2011 Pearson Education, Inc. Running Water Earth, 10e - Chapter 16.

A. Hydrologic cycle o The hydrologic cycle is a summary of the circulation of Earth’s water supply o Processes involved in the hydrologic cycle o Precipitation.

Hydrologic Hazards at the Earth’s Surface

Warmup How many river basins are in North Carolina? Which two river basins border Apex? Write two facts about your river basin from Friday.

Stormwater control and management road map to 2055 Sustainable Development and Natural Resources.

Living with Streams in Flood

Flooding How does flooding relate to weathering, erosion, and deposition?

Section 3: Stream Deposition

River Systems. Objective  Students will describe factors that affect the erosive ability of a river and the evolution of a river system.

Journal #5 What is a flood? Why are floods harmful? What can humans do to prevent floods?

HUMAN IMPACT ON RIVERS HOW RIVERS ARE USED BY HUMANS Transportation A)Some rivers form natural route ways which can be used for transport eg. St. Lawrence,

The Work of Streams Erosion Destroys the land. The Work of Streams Erosion Destroys the land Deposition Makes new land.

River systems. Runoff vs. Infiltration Factors determining runoff, or infiltration 1.Soil composition & pore space Coarse-grains & lots of humus = good.

FLOODS IN REPUBLIC OF GEORGIA June 13-15, 2015 Walter Hays, Global Alliance for Disaster Reduction, Vienna, Virginia, USA Walter Hays, Global Alliance.

BANGLADESH FLOOD 2K4. Causes of flood… 1.Monsoon climate brings very heavy rainfall and snow soils are leached and heavy runoff results in soil erosion.

Case Lamong River Flood Problem Form (A): Inundation (a) Cause (B): Direct rainfall (a) Flood discharge from upstream runoff (b) Duration (C): Rapid on-set.

Hydrosphere Notes Parts 1 – Rivers. How does a river develop? When precipitation is greater than evapotranspiration Or from a spring where groundwater.

Young Streams vs. Old Streams. How river systems change from young to mature! YOUNG MATURE Wide Channels Wide Channels Large floodplains Large floodplains.

Flood–Causes.

Lecture Outlines Physical Geology, 12/e

Management of Flood Waters through Mcphee Reservoir

River System Development

Floods Hard Engineering

Created By: Tyler Chalk, Clair Segelke, Sam Sroufe, and Caleb Baker.

Gavin Point Dam.

The Work of Streams.

Too Much Water! Flooding

Water Pollution, water cycle, flooding and urbanization

Warmup How many river basins are in North Carolina?

Hydrologic Engineering

Managing River Floods Natural Physical Causes of Floods

Definition of Floods Flood: Overflows of large amounts of water onto land that is normally dry. Coastal flood: Happens near a coast River flood: River.

13.3 V shape As they grow they become U shaped How do rivers begin?

Presentation transcript:

Flood maps – Modeling a levee break

Flooding Urban flooding –Paved areas and storm sewers increase runoff by inhibiting infiltration –Rapid delivery of water to streams increases peak discharge and hastens occurrence of flood Flash floods –Local, sudden floods of large volume and short duration –Typically triggered by heavy thunderstorms

Flooding Flood control –Dams designed to trap flood waters in reservoirs upstream and release it gradually over time –Artificial levees designed to increase capacity of river channel Works well until stream overtops artificially raised levees, leading to extremely rapid flooding and erosion –Wise land-use planning, including prevention of building within 100-year floodplains, is most effective

Real-time river data