Category: Rainfall

Surface Runoff Options in InfoSWMM H2OMap SWMM

Surface Runoff Options in InfoSWMM H2OMap SWMM

InfoSWMM and H2OMap SWMM offers 12 choices for modeling surface runoff (click on link to see more information on each method):

· Nonlinear Reservoir

· The Colorado Urban Hydrograph Procedure (CUHP)

· NRCS (SCS) Dimensionless Unit Hydrograph Method

· NRCS (SCS) Triangular Unit Hydrograph Method

· Delmarva Unit Hydrograph

· Snyder Unit Hydrograph Method

· Clark Unit Hydrograph Method

· Espey Unit Hydrograph Method

· Santa Barbara Urban

Huff Rainfall Distribution SWMM 5 Model

Huff Rainfall Distribution SWMM 5 Model

Huff Distribution Model in SWMM 5

[TITLE]
Scenario Run :  BASE

[OPTIONS]
FLOW_UNITS          	LPS
INFILTRATION        	HORTON
FLOW_ROUTING        	DYNWAVE
START_DATE          	01/01/2020
START_TIME          	00:00:00
REPORT_START_DATE   	01/01/2020
REPORT_START_TIME   	00:00:00
END_DATE            	01/02/2020
END_TIME            	12:00:00
SWEEP_START         	01/01
SWEEP_END           	12/31
DRY_DAYS            	5.000000
REPORT_STEP         	00:01:00
WET_STEP            	01:15:00
DRY_STEP            	01:15:00
ROUTING_STEP        	0:01:00 
ALLOW_PONDING       	NO
INERTIAL_DAMPING    	NONE
VARIABLE_STEP       	0.75
LENGTHENING_STEP    	0
MIN_SURFAREA        	0
NORMAL_FLOW_LIMITED 	BOTH
SKIP_STEADY_STATE   	NO
FORCE_MAIN_EQUATION 	H-W
LINK_OFFSETS        	DEPTH
MIN_SLOPE           	0

[EVAPORATION]
;;Type      	Parameters

From 3QD – WATER RISK AS WORLD WARMS

WATER RISK AS WORLD WARMS

Quirin Schiermeier in Nature:

WaterWhen pondering the best way to study the impact of climate change, researcher Hans Joachim Schellnhuber liked to recall an old Hindu fable. Six men, all blind but thirsty for know­ledge, examine an elephant. One fumbles the pachyderm’s sturdy side, while others grasp at its tusk, trunk, knee, ear or tail. In the end, all are completely misled as to the nature of the beast.

Singapore – Catching Every Drop of Rain

Singapore – Catching Every Drop of Rain

 

The source of the map of the rivers of Singapore is the Singapore PUB

As a small island that doesn't have natural aquifers and lakes and with little land to collect rainwater, Singapore needs to maximize whatever it can harvest.

Currently, Singapore uses two separate systems to collect rainwater and used water. Rainwater is collected through a comprehensive network of drains, canals, rivers and stormwater collection ponds before

SWMM 5 Precipitation Options

Subject:  SWMM 5 Precipitation Options

 

You can have design storms, monitored storms of any length of the time from minutes to centuries, use intensity, volume or cumulative precipitation, use both rainfall and snowfall in the same rain gage depending on temperature, use both time series or external files for the rain gage and have unlimited rain gages with the limitation of one rain gage per subcatchment .

 

 

via Blogger http://www.swmm5.net/2013/08/swmm-5-precipitation-options.html…

Increase in heavy rainfalls over past 60 years in upper Midwest, US

Increase in heavy rainfalls over past 60 years in upper Midwest, US

March 14, 2013
Mar. 13, 2013 — Heavy rains have become more frequent in the upper Midwest over the past 60 years, according to a study from the University of Iowa. The trend appears to hold true even with the current drought plaguing the region, the study’s main author says.
The fact that temperatures over the country’s midsection are rising, too,