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Hydrology 101: Modelling Demonstration 19 June 2014 Gavin Fields
Hydrology 101: Modelling Demonstration
19 June 2014 Gavin Fields
This is part of our XP-LIVE educational program Webinars have been recorded and are available at
http://www.xpsolutions.com/category/news/xplive/ Hydrology 101: Modelling Demonstration
XP-LIVE webinar
Agenda
Introduction Hydrology in XPSWMM Historic vs Design Storms Routing Methods Results Direct (2D) Rainfall Question / Answer
Software for modeling wastewater, stormwater, and floods Graphical User Interface (GUI) and analytical engines CAD/GIS type interface and data management tools Graphical reports, maps, animations 1D analytical engine solves the complete St. Venant (Dynamic Flow)
equations for gradually varied, one dimensional, unsteady flow 2D analytical engine embedded as xp2D
Introduction
Why Hydrology is important?
Agriculture Planning Stormwater Flood / Risk
Engineering Assessing Change
Hydrology Overview
Precipitation – losses = runoff
Precipitation Rainfall intensity, duration, volume Snow Melt Groundwater
Losses Evapotranspiration Infiltration Depressions Storage
Runoff Hydrograph Peak flow Peak volume
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0.1
0.2
0.3
1 WedJan 2014
0:30 1:00 1:30
Node - Laur 0%[Max Flow = 0.3350]
Hydr
olog
y Ra
tes
Flow
(cm
s)
Time
Rainfall Total Infiltration Flow
Roads often follow the interfluve
The boundary of a catchment is known as an interfluve.
Catchments vary in size.
The Murray-Darling basin drains 1/7th of the Australian continent
Topographic maps help to identify slope patterns and catchment areas.
Design Storms Average intensity/ absolute depth is required Storm duration is required Temporal pattern is required Historic Storms Recorded storm events Return period can be calculated
Storms
Key Parameters
Area Rainfall Catchment Slope Catchment Roughness Catchment Width and
Length (at times) Land use characteristics
Many Hydrology Methods
SWMM Runoff Kinematic Wave Laurenson SCS Unit Hydrographs SBUH, Snyder Rational Time Area Nash, Clark
Rational Formula Plus Regional Methods LA County Method (MODRAT) CUHP Alameda County (Snyder) 2 Sacramento Methods 5 UK Methods
What Do We Want to Produce
Hydrographs Derive peak flow and volume Related to rainfall frequency
Historic rainfall or design storms
Questions? Comments?
Thank you for joining this presentation,
Hydrology 101: Modelling Demonstration By Gavin Fields
Contact XP Solutions Americas: +1 888 554 5022 [email protected] Asia Pacific: +61 7 3310 2302 [email protected] EMEA: +44 0 1635 582555 [email protected]
www.xpsolutions.com
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