From the Dish and Andrew Sullivan “The Cheerful World Of Japanese Manhole Covers”

The Cheerful World Of Japanese Manhole Covers

by Maisie Allison

Michelle Aldredge introduces us to a minor feat in public art:

One of my favorite book discoveries this summer is Drainspotting

 by Remo Camerota. The book celebrates an array of fascinating manhole cover designs from Japan. According to Camerota, nearly 95% of the 1,780 municipalities in Japan have their very own customized manhole covers. The country has elevated this humble, practical object to its own art form. The designs depict everything from local landmarks and folk tales to flora and fauna and images created by school children. Camerota explains the evolution of these custom covers in Drainspotting  http://www.gwarlingo.com/2011/drainspotting-61-amazing-manhole-covers-from-japan/
“In the 1980s as communities outside of Japan’s major cities were slated to receive new sewer systems these public works projects were met with resistance, until one dedicated bureaucrat solved the problem by devising a way to make these mostly invisible systems aesthetically appreciated aboveground: customized manhole covers.”

SWMM 5 - One Hour Rainfall Subcatchment Pathways

One Hour Rainfall Subcatchment Pathways

Map Display of LID Usage in SWMM 5

Subject:   Map Display of LID Usage in SWMM 5

A new Map Display feature in SWMM 5.0.022 is the LID Usage parameter which shows you whether a Subcatchment has LID’s or not.   You use it by using Map Display and choosing LID Usage as the Map Display.  LID - Low Impact Development.

 Map Display of LID Usage in SWMM 5

Example VSP Pump in SWMM 5 - Version 1

Subject:   Example VSP Pump in SWMM 5 - Version 1

Here is one way to model multiple pumps between the same downstream and upstream nodes using the pump curves and the Real Time Control Rules (RTC) in SWMM 5.  Here are the steps:

1.   Enter the data for three pumps in the browser by using the Add Pump Icon
2.   Enter three Pump Head/Flow Curves so that the 2^nd and 3^rd Pump Curves are the sum of the flows in the 1^st and 2^nd Pumps together and the sum of the flows in the 1^st, 2^nd and 3^rd respectively for the 2^nd and 3^rd Pump Curves

3.   Enter a RTC Rule in the Control Editor so that when the 1^st Pump is turned on – the 2^nd and 3^rd Pump is turned off
4.   Enter a RTC Rule in the Control Editor so that when the 2^nd  Pump is turned on – the 1^st  and 3^rd Pump is turned off
5.   Enter a RTC Rule in the Control Editor so that when the 3^rd  Pump is turned on – the 1^st and 2^nd Pump is turned off

Using these rules you can see that for the 1^st Pump turns on when the Node WetWell has a depth below 2 feet, the 2^nd Pump turns on when the Node is between a depth of 2 to 5 feet and the 3^rd Pump turns on when the Node Depth is above 5 feet.

RULE Pump1
IF Node WetWell Depth <= 2
THEN PUMP PUMP2 STATUS = OFF
AND PUMP PUMP3 STATUS = OFF
Priority 1

RULE Pump2
IF Node WetWell Depth > 2
AND Node WetWell Depth <= 5
THEN PUMP PUMP1 STATUS = OFF
AND PUMP PUMP3 STATUS = OFF
Priority 2

RULE Pump3
IF Node WetWell Depth > 5
THEN PUMP PUMP1 STATUS = OFF
AND PUMP PUMP2 STATUS = OFF
Priority 3