Infiltration Pond

What are you studying in school? Or what did you study? Ever consider how your sciences are important when it rains?

One of the concerns about the library property is the management of the storm water. This is important because it can help get us one LEED (Leadership in Energy and Environmental Design) point. Credit 6.1: Stormwater Design: Quantity Control’s intent is to “Limit disruption of natural water hydrology by reducing impervious cover, increasing on-site infiltration, reducing or eliminating pollution from stormwater runoff and eliminating contaminants.”  

For me that is a bit dry and hard to follow. However, in thinking that if we receive 1.5 inches of rain in one hour, that water needs to go somewhere. This pond will help contain that water and then allow it to absorb into the ground and also to be sent into the storm sewers to take it off site.  

When building the pond, two parts are considered. The first is how much water can be held and the second is how long it takes to release the water. Our pond is built to contain 15,000 cubic feet of water.  By using mathematical statistics, of other areas with similar climates and ground types, an average size is developed.  This design is based on the 100 year rainfall chart, which shows that we would expect 6.5 inches over a 24 hour period.    Another area of mathematics, geometry, is put to use in deciding if the pond is going to round or oval. Geology, the study of the earth, is also important.  What type of soil and how quickly water absorbs into this soil and what the water table below the soil is, helps determine the size. Our pond is fat clay which is typical for this region.

Geology, mathematics, statistics are all subjects used in the development of the infiltration pond.

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November 4, 2009 · sschulte · No Comments
Tags: ,  · Posted in: Sewers and basins

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