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UTM_SWMM_KAMAL
1. Modelling Urban Runoff Quantity using Storm Water Storm
Water Management (SWMM)
Prepared by
Kamal Ahmed
(PA123084)
Supervisor
Dr. Shamsuddin Shahid
2. Introduction
o EPA's Storm Water Management Model (SWMM) is used throughout
the world for planning, analysis and design related to stormwater
runoff, combined and sanitary sewers, and other drainage systems in
urban areas.
o SWMM is a comprehensive hydrological and water quality
simulation model used for single or continuous events of runoff in
urban areas.
o Stormwater monitoring programs in urban catchment are crucial for
characterizing the quality of stormwater runoff and formulate
effective pollution control strategy.
o SWMM tracks the flow rate, flow depth, and quality of water in each
pipe and channel during a simulation period made up of multiple time
steps.
3. Introduction
SWMM 5 has recently been extended to model the hydrologic
performance of specific types of low impact development
(LID) controls.
The LID controls that the user can choose include the
following seven green infrastructure practices:
o Bio-Retension cell
o Rain gardens
o Green roofs
o Street planters
o Rain barrels
o Infiltration trenches
o Vegetative swales
4. Model parameterization
SWMM requires three major information for runoff quantity
modelling:
(1) Physical Catchment Characteristics
(2) Rainfall
(3) Infiltration
The physical catchment data are
(a) Total catchment area (A)
(b) Percentage of impervious area (%Imp)
(c) Catchment width (W)
(d) Average slope (So)
(e) Surface depression storage
(f) Surface roughness
