Reading: Applied Hydrology Sections 14-5, 14-6

Slides:



Advertisements
Similar presentations
Generating Flow Frequencies – Updating NOAA Atlas Precipitation Frequency for California by: John High, Hydrologist Sacramento District Sacramento District.
Advertisements

CHARACTERISTICS OF RUNOFF
Runoff Estimation, and Surface Erosion and Control Ali Fares, PhD NREM 600, Evaluation of Natural Resources Management.
Reading: Applied Hydrology Sec 14.1 – 14.4
Continuous Hydrologic Simulation of Johnson Creek Basin and Assuming Watershed Stationarity Rick Shimota, P.E. Hans Hadley, P.E., P.G. The Oregon Water.
Hydrologic Design and Design Storms Venkatesh Merwade, School of Civil Engineering, Purdue University Some slides are taken from Dr. David Maidment, University.
Upper Brushy Creek Flood Study – Flood mapping and management Rainfall depths were derived using USGS SIR , Atlas of Depth Duration Frequency.
Reading: Applied Hydrology, Sec 15-1 to 15-5
Lecture ERS 482/682 (Fall 2002) Precipitation ERS 482/682 Small Watershed Hydrology.
Lecture ERS 482/682 (Fall 2002) Rainfall-runoff modeling ERS 482/682 Small Watershed Hydrology.
By Jennifer VerWest. Differences between Flat and Average/Steep Terrain Flat Terrain Steep/Average Terrain.
Precipitation statistics Cumulative probability of events Exceedance probability Return period Depth-Duration-Frequency Analysis.
CE 3372 – Lecture 10. Outline  Hydrology Review  Rational Method  Regression Equations  Hydrographs.
Hydrologic Design and Design Storms
Climate, Change and Flood Planning CCTAG April 2013.
Stormwater Infrastructure for Water Quality Management Dr. Larry A. Roesner, P.E. CE 394K.2 Surface Water Hydrology University of Texas, Austin April 8,
Analyses of Rainfall Hydrology and Water Resources RG744
Jefferson High School Compton Creek Research Project UCLA and Los Angeles Waterkeeper Funded by the Environmental Protection Agency.
Tropical Storm Allison & its impact on Harris County
History and Evolution of the PMP/PMF
Basic Hydrology & Hydraulics: DES 601
Storms Statistics for Texas "a small portion of" TxDOT RMC-3 Research Project U.S. Geological Survey Texas Tech University Lamar University University.
Hydrologic Cycle. Hydrologic Cycle Processes Surface Water Soil water Atmospheric water Groundwater Processes Precipitation Evaporation Surface Runoff.
El Vado Dam Hydrologic Evaluation Joseph Wright, P.E. Bureau of Reclamation Technical Services Center Flood Hydrology and Meteorology Group.
Statewide Map-based IDF Analysis Norman Gonsalves for Caltrans.
Watershed Management Water Budget, Hydrograph Analysis
Copyright [insert date set by system] by [CH2M HILL entity] Company Confidential Hydrologic Evaluation of the Little Thompson River Phase 2: Little Thompson.
Estimating Future Floods to Manage Flood Risk Michael Anderson California State Climatologist Extreme Precipitation Symposium 2012.
FLASH FLOOD PREDICTION James McDonald 4/29/08. Introduction - Relevance  90% of all national disasters are weather and flood related  Central Texas.
TXHYETO.XLS: A Tool To Facilitate Use of Texas-Specific Hyetographs for Design Storm Modeling Caroline M. Neale Texas Tech University.
Frequency Analysis and Data Reading: Applied Hydrology Sections
National Weather Service - Southeast River Forecast Center Southeast River Forecast Center North Florida Visit July 17-20, 2006 Southeast River Forecast.
Hydrologic Design Storms
Assessment of Economic Benefits of the North Carolina Floodplain Mapping Program Hydrologic and Hydraulic Case Studies Adapted from a Presentation to NRC.
Flash flood forecasting in Slovakia Michal Hazlinger Slovak Hydrometeorological Institute Ljubljana
Design Storms CE 365K Hydraulic Engineering Design Spring 2015.
Long Valley Creek: A Rainfall-Runoff Modeling Story Rob Thompson Hydrologist U.S. Army Corps of Engineers Sacramento District
Introduction to GIS in Water Resources David R. Maidment Director, Center for Research in Water Resources University of Texas at Austin CRWR.
Basic Hydrology & Hydraulics: DES 601 Module 6 Regional Analysis.
CE 3354 Engineering Hydrology
Basic Hydrology: Rainfall-Runoff – I
Introduction to Urban Hydrology
Some issues in flood hydrology in the climate context
The Effect of Urbanization to the surface-water runoff The comparison between the urbanized and undeveloped zones.
Hurricane Irene in Connecticut River Milena Spirova CE 394 K 2015.
Module 11: Average Rainfall Theodore G. Cleveland, Ph.D., P.E, M. ASCE, F. EWRI August 2015 Module 11 1.
Storm Water Management Plan Lawrence County, PA Katelyn Zollos CE 549.
Analyses of Rainfall Hydrology and Water Resources RG744 Institute of Space Technology October 09, 2015.
A Study of the Extremity of the October 1998 Rainfall Event
Extreme Events Extreme events are defined as “most unusual” climatic events at a given place (natural and anthropogenic causes) “Most unusual” can be.
Finishing Precipitation
Basic Hydrology & Hydraulics: DES 601
Cristina Nelson, Term Project, CEE 6440, Fall 2007
Flooding adapted from a presentation by Prof. David R. Maidment
The Woodlands - a Totally Planned Community
Introduction to Urban Hydrology
GIS in Water Resources Presentation By: Zac Sharp
Distributions and Flood Frequency Chapter 3 – Part 2
The Woodlands - a Totally Planned Community
Precipitation Analysis
INTRODUCTION TO HYDROLOGY
Hydrograph Computation
Watersheds in Austin Area
Floods in the Lower Schuylkill River at Philadelphia
Depth-Duration Frequency of Precipitation
Urbanization and the Effect on Watershed Hydrology
Preciptation.
Love Field Modernization Program
WRE-1 BY MOHD ABDUL AQUIL CIVIL ENGINEERING.
Review for Second Exam April 16, 2013
Presentation transcript:

Reading: Applied Hydrology Sections 14-5, 14-6 Extreme Storms Reading: Applied Hydrology Sections 14-5, 14-6

http://www.tsarp.com/ Most costly urban flood disaster in the history of the United States

Major Highways during Tropical Storm Allison I-10 West I-45 South http://www.chron.com/content/chronicle/special/01/flood/

Kayaking on US 59, Houston (Tropical Storm Allison) http://www.chron.com/content/chronicle/special/01/flood/

Residential Flooding in Tropical Storm Allison http://www.chron.com/content/chronicle/special/01/flood/

The Human Cost Saving the wedding photos Cleaning out the car http://www.chron.com/content/chronicle/special/01/flood/

5-day rain total (Tropical Storm Allison) City of Houston Harris County

12-hour rain total (Tropical Storm Allison)

Extreme Rainfall Statistics (Tropical Storm Allison)

73,000 houses and apartment buildings flooded

Watersheds Stream gaging station Watershed = area that drains to a particular river or stream network

Tropical Storm Allison http://www.hcfcd.org/downloads/reports/TS-Allison_PubReportENGLISH.pdf

PMP is ~31” in 12 hours 100 year storm Rain Gage Locations

Flooding Scenarios in Houston

100 year storm depths http://fbcmap.co.fort-bend.tx.us/floodplainmap/Drainage%20Criteria%20Manual%202011/Entire%20Document%201.pdf

Atlas of Depth-Duration-Frequency for Texas Return period = 2, 5, 10, 25, 50 100, 250, 500 years Duration = 15, 30 min, 1,2,3,6, 12 hr, 1,2,3,5,7 days 8 return periods x 12 durations = 96 maps http://pubs.usgs.gov/sir/2004/5041/pdf/sir2004-5041.pdf

Rainfall Frequency Analysis in Texas In 1998, William Asquith at the USGS Texas Office analyzed virtually all rainfall data available in the State of Texas using L-moment methodology and published the results in a USGS Water Resources Investigations Report (WRIR 98-4044). In November 2001, Dr. Asquith summarized his rainfall study of 1998 and generated the IDF and the DDF (depth-duration-frequency) values that are suitable for use in the City of Austin and Travis County.

City of Austin Depth-Duration-Frequency (inches) http://austintech.amlegal.com/nxt/gateway.dll/Texas/drainage/cityofaustintexasdrainagecriteriamanual?f=templates$fn=default.htm$3.0$vid=amlegal:austin_drainage$anc=

City of Austin Intensity-Duration-Frequency (In/hr) http://austintech.amlegal.com/nxt/gateway.dll/Texas/drainage/cityofaustintexasdrainagecriteriamanual?f=templates$fn=default.htm$3.0$vid=amlegal:austin_drainage$anc=

City of Austin Probable Maximum Precipitation The PMP values were derived using Hydrometeorological Report No. 52 (HMR-52) and Hydrometeorological Report No. 51 (HMR-51) per the guidance provided in the Hydrologic and Hydraulic Guidelines for Dams in Texas (January 2007) available from the Dam Safety Program at the Texas Commission on Environmental Quality (TCEQ).

Design Storm Depths in Travis and Harris Counties

Probable Maximum Precipitation Depths 6-hour, 10 mile2 6-hour, 200 mile2

Probable Maximum Precipitation Depths 12-hour, 10 mile2 24-hour, 10 mile2

Extreme Precipitation Estimates in Travis and Harris Counties Probable Maximum Precipitation (PMP) is for a 10 Km2 storm area

Drainage Area of Waller Creek at 15th St (12.2 km2)

PMP Standard Storm Shape – Ellipse with axes 2.5:1 1.0 Smallest area = 10 mi2 Imagine this like a layer cake with most rain in A, less in B, less in C, and so on …..

Hurricane Storm Tracks

Recommended Storm Orientation for Austin is an azimuth of 200°

Waller Creek Watershed Orientation 8.2 km 3.0 km tan θ= 8.2 3.0 = 2.73 Θ = 70° 90 - Θ = 20° Azimuth = 180° + 20° = 200° 200° θ Azimuth from North of the watershed is ~ 200° Waller Creek falls right along the path of recommended storm orientation!

Depth-Area-Duration Curves for Leon Creek Area (mi2) For 10 square miles in Austin, the PMP depths are 1-hr 17.4”, 2-hr 21.6”, 3-hr 24.9”, 6-hr 31.1” 12-hr 37.6”, 24-hr 44.7”, 48-hr 50.0”, 72-hr 53.4” Slightly larger than for Leon Creek in Belton, Texas 6 12 24 48 72 Duration (hrs) PMP Depth (Inches) Mean annual precipitation in Austin is 34.2”

City of Austin Probable Maximum Flood To determine the PMF, each of the possible storm durations (1, 2, 3, 6, 12, 24, 48, and 72 hour storms) needs to be analyzed in order to determine the critical duration. The critical duration is the storm duration that produces the highest water surface elevation behind the dam. The PMF for each storm duration is derived using the PMP depths from Table 2-9 and using a rainfall-runoff model (HEC-1, HEC-HMS, TR-20). The runoff parameters used in the PMF model are the same as those used for runoff analyses of the more frequent storm events, with the exception of curve numbers and temporal distribution of rainfall. The rainfall-runoff model should use the temporal distribution as provided in the Hydrologic and Hydraulic Guidelines for Dams in Texas. The temporal distribution for each storm duration has been reproduced in Figure 2-4, Appendix E. Runoff curve numbers for the PMF need to reflect the assumption that the soils will be saturated. Therefore the runoff curve number should be based on Antecedent Moisture Condition III (AMC).