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89:
When water is diverted into a lower area that has no outlet or is not suitable for drainage, water will begin to pool, and over time the weight of the water will create a deeper pool, allowing more water to sit, eventually creating a permanent water feature. Some municipalities recognize this as an
101:
has noted that "groundwater ponding is a chronic problem, that results in damp housing and waterlogged sections. The damage that it causes is less apparent than the damaging events associated with floods, but the duration of groundwater ponding, which can last for several months, makes it a serious
23:
or roadway. Ponding water accelerates the deterioration of many materials, including seam adhesives in single-ply roof systems, steel equipment supports, and particularly roofing asphalt. On low-slope asphalt roofs, ponding water allows the oil solvent components of the asphalt to leach out and
44:, internal drains, or a combination of these. When a scupper or drain is clogged or fails for other reasons, storm water tends to pool around that low area. Over time, with each passing storm, the weight of the storm water will deflect the structural system beyond the structure's
48:
point, thus allowing a bigger puddle to form. As a bigger puddle forms more weight is applied to the structural system causing more bending, allowing an even bigger puddle, then more weight, until the structure fails.
80:
For roofs with a slope less than 1/4 inch per foot , the design calculations shall include verification of adequate stiffness to preclude progressive deflection in accordance with
Section 8.4 of ASCE 7.
331:
Urban planning - managing surface water and groundwater ponding" by
Michelle Malcolm, Craig Martell, and Brydon Hughes, Sinclair Knight Merz Ltd. Kapiti Coast District Council 2008
72:
When scuppers are used for secondary (emergency overflow) roof drainage, the quantity, size, location and inlet elevation of the scuppers shall be sized to prevent the depth of
272:"Investigation, analysis and design of an experiment to test ponding loads on flexible roof systems" by Duncan Stark, published by Oregon State University, June 2008
40:
Most flat roof systems (properly called "low-slope roof systems") are designed with a slight pitch to shed water off the sides, usually into gutters,
58:
61:(NRCA) defines roof ponding as "water that remains on a roof surface longer than 48 hours after the termination of the most recent rain event".
224:
197:
105:
Ponding that forms on paved surfaces, like streets or parking lots that are not properly pitched, will cause issues such as deep puddles and
24:
evaporate, leaving the roof membrane brittle and susceptible to cracking and leaking in the ponding location. The time taken for water to
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Chapter 15 "Roof
Assemblies and Roof Top Structures" & Chapter 16 "Structural Design";
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32:, causing a pond to form, is referred to as the "ponding time" or "time of ponding".
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144:"Building Envelope Design Guide - Roofing Systems | Whole Building Design Guide"
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244:(3rd ed.). New York: McGraw-Hill. pp. Chapter 3: Draining the Roof.
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311:
2009 international building code, by
International Code Council in Books
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646:
628:
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292:"Extensive Range of Single Ply Roofing and Waterproofing Systems"
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829:
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380:
368:
29:
341:
281:"The Evils of Ponding Water" October 31, 2009, by Paul Graham
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from exceeding that for which the roof was designed ...
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is the (typically) unwanted pooling of water, typically on a
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169:Infiltration Theory for Hydrologic Applications
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8:
90:issue on private land, such as the City of
360:
346:
338:
240:Griffin, C. W.; Fricklas, R. L. (1996).
59:National Roofing Contractors Association
216:The Handbook of Groundwater Engineering
135:
7:
213:Delleur, Jacques W. (2010-12-12).
57:In the construction industry, the
14:
547:
242:Manual of low-slope roof systems
192:. Cambridge University Press.
1:
172:. American Geophysical Union.
102:issue for those affected".
66:International Building Code
867:
189:Hydrology: An Introduction
545:
539:Waste stabilization pond
82:
64:According to the 2009
494:Salt evaporation pond
70:
749:Big fish–little pond
718:Freshwater ecosystem
652:Puddles on a surface
119:Horton overland flow
78:Ponding instability.
759:Constructed wetland
184:Brutsaert, Wilfried
642:Coffee ring effect
449:Infiltration basin
429:Facultative lagoon
124:Stabilization pond
107:crocodile cracking
97:A municipality in
53:Construction codes
838:
837:
779:Pond of Abundance
713:Aquatic ecosystem
226:978-1-4200-4858-2
199:978-0-521-82479-8
858:
551:
424:Evaporation pond
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564:Anchialine pool
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294:. William Carey
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85:Ponding on land
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28:, usually from
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812:Water aeration
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723:Lake ecosystem
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484:Retention pond
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444:Immersion pond
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186:(2005-08-11).
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807:Swimming hole
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690:Goldfish pond
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574:Infinity pool
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504:Settling pond
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499:Sediment pond
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219:. CRC Press.
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74:ponding water
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851:Construction
823:Water Lilies
822:
817:Water garden
797:(M C Escher)
794:
788:
744:Bakki shower
579:Natural pool
479:Raceway pond
409:Cooling pond
399:Ballast pond
327:
316:
307:
296:. Retrieved
286:
277:
268:
241:
235:
215:
208:
188:
178:
168:
162:
151:. Retrieved
148:www.wbdg.org
147:
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96:
92:Indianapolis
88:
77:
73:
71:
63:
56:
39:
16:
15:
769:Hydric soil
657:Seep puddle
619:Vernal pool
604:Stream pool
589:Plunge pool
454:Kettle pond
434:Garden pond
99:New Zealand
784:Pond liner
774:Phytotelma
705:Ecosystems
675:Beaver dam
584:Ocean pool
569:Brine pool
534:Waste pond
509:Solar pond
298:2015-03-01
153:2016-08-11
130:References
764:Full pond
685:Fish pond
680:Duck pond
637:Bird bath
614:Tide pool
519:Stew pond
469:Mill pond
464:Melt pond
21:flat roof
845:Category
695:Koi pond
524:Tailings
514:Stepwell
489:Sag pond
459:Log pond
439:Ice pond
419:Dew pond
389:Ash pond
321:indy.gov
260:33244913
113:See also
42:scuppers
30:rainfall
825:(Monet)
789:Ponding
732:Related
629:Puddles
373:puddles
46:bending
17:Ponding
802:Spring
795:Puddle
647:Puddle
258:
248:
223:
196:
667:Biome
557:Pools
381:Ponds
369:Ponds
36:Cause
830:Well
529:Tarn
404:Beel
256:OCLC
246:ISBN
221:ISBN
194:ISBN
847::
254:.
146:.
109:.
94:.
361:e
354:t
347:v
301:.
262:.
229:.
202:.
156:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.