Download presentation
Presentation is loading. Please wait.
Published byAndra Horton Modified over 9 years ago
1
Floodplain Management SESSION 4 Stream Systems on Dynamic Earth Hydrosphere Prepared By Donald R. Reichmuth, PhD.
2
Meteorological Framework Objectives: 1.Show Temperature & Pressure Gradients 2.Show Water Sources 3.Define A River Basin 4.Explain Published Resource Data 5.Illustrate Factors Affecting Weather 6.Discuss Metrological processes within the context case study floodplains.
3
North American Temperature Data Mid-Continent: (North Central US & Canadian Plains) Normally has cold winters and hot summers that causes Mid-Continent Winter High Pressure & Summer Low Pressure
4
Winter Temperature Data Typical Winter Pattern: Coldest in Northern Mid-Continent 2004 Departure: From Mean
5
North American Air Flow Monsoon Pattern: Monsoon Defined: A wind system that reverses direction between summer and winter.
6
Monsoon Air Flow
8
Earth’s Water Sources: Outer Space Volcanoes Rock Disintegration Total Volume: 309,000 Units One Unit (1) = 4475 Cubic Km (1070 Cubic Miles) 100 Units = Yearly Evaporation From Oceans 300,000 Units = Present Volume All Oceans
9
Water Distribution ( Total Units)
10
Hydrologic Cycle Evaporation From Oceans Wind Moves Moisture Laden Clouds Moisture Condenses & Falls Precipitation Falls Back Into Oceans Produces Stream Flow On Land Enters Groundwater On Land Water Returns To Oceans
11
Simplified Hydrologic Cycle
12
Detailed Hydrologic Cycle ( Units Per Year)
13
Runoff Defined Runoff (Two Forms): Surface Stream Flow Controlled by Surface Topography Groundwater Flow Controlled by Subsurface Structure
14
Catchment Defined The surface catchment area is that area of a River Basin upstream from a given point on a stream where “surface runoff” is determined. The groundwater catchment area is all areas that contribute recharge water to the subsurface aquifer.
15
River Basin Example
16
Basin Topographic Map Grand River NOTE: Subbasins Marked
17
Block Diagram Grand River Basin
18
Moisture Forecast http://www.cpc.ncp.noaa.gov/ ptoducts/analysis/monitoring/cdus/palmer_drought_outlook.gif http://www.cpc.ncp.noaa.gov/
19
River Forecast Centers www.nws.noaa.gov/er/nerfc
20
Hazards Assessment Briefing http://www.cpc.ncep.noaa.gov/ products/predictions/threats http://www.cpc.ncep.noaa.gov/
21
Precipitation Data National Resources Conservation Service (NRCS) National Water & Climate Center www.wcc.nrcs.usda.gov/ Snow Survey & Water Supply www.nrcs.gov/programs/snowsurvey/ Western Regional Climate Center (WRCC) wrcc@dri.edu
22
NRCS Snow Water Content http://www.mt.nrcs.usda.gov/snow/data.current.htm
23
River Basin Precipitation Data (wrcc@dri.edu)
24
Floodthreat Example
25
Flood Risk Example
26
Flood Warning Example April 11, 2004 Red River, ND
27
Palmer Drought Severity Index 1.A “Meteorological” Drought Index 2.Widely Used In The USA 3.Measures Abnormality 4.Range +6 ---- Extremely Wet 0 ------ Near Normal -6 ----- Extremely Dry
28
Dendrochronology Example: Determining Past Climate Conditions
29
Drought Information Center (NOAA) http://www.drought.noaa.gov/index.html Home Page Menu Lists Links To Numerous Products Precipitation Soil Moisture Drought Fire Potential Temperature
30
Drought Conditions http://drought.unl.edu/dm
31
Drought Prediction http://www.ncep.noaa.gov/ products/expert_assessment/season_drought.gif http://www.ncep.noaa.gov/
32
Local Microclimates Orographic Precipitation Caused by Anabatic (Blowing Up Slope) Wind Rain Shadows Caused by Katabatic (Blowing Down Slope) Wind Lake Effects Caused by Wind Blowing Over Water Heat Islands Caused by Urban Heat Sources Acid Rain Caused by SO 4 Emissions
33
Topographic Influence
34
Effect of Smoke Stack Emissions
35
Effect Of Urban Heat Islands
36
Lake Effect On Snowfall
37
Average Runoff Patterns Low ----- Western Plains & Southwest High ----- New England, Appalachians, Gulf Coast & Pacific Northwest
38
Slide Presentation Prepared By Geomax, P.C. Dr. Donald R. Reichmuth, President 1023 W. 30 th Ave. Spokane, WA 99203-1324 Phone & FAX – 509-838-6390 E-mail – geomax@comcast.net
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.