The Stormwater Blog 

Contech Stormwater experts discussing Low Impact Development, Onsite Water Management, Rainwater Harvesting and all things Stormwater.

This short video explains how rainwater harvesting is a logical and feasible approach to managing stormwater runoff using example usage for a typical commercial office building.
What is Siphon-Actuated Filtration?
This patented technology is employed by the Stormwater Management StormFilter in order to prevent surface blinding, ensure use of all media, and prolong cartridge life. In principal, the system siphons stormwater runoff through its cartridge.
Categories: Filtration
Lab Testing Stormwater BMPs: The Pros & Cons
As an industry, we’ve acquired a vast amount of knowledge about stormwater, its adverse impacts and the best management practices (BMPs) implemented to mitigate them. However, the spirited debate with regard to whether the field or the laboratory is the best arena for evaluating BMP performance refuses to yield to consensus. Here are some of the arguments for and against laboratory testing...
Filtration Basics: Understanding the Fundamentals of Media Filtration
There are many aspects of stormwater filtration. Here, we discuss media surface area, surface vs. bed filtration, media hydraulic conductivity and flow control, performance data and longevity.  And how it can help you choose the right stormwater filter system.
Cost-Effective Infiltration - A Comparison of Two Systems
 If more than one type of infiltration system meets your project requirements, your decision may be cost driven. It’s important to maximize the storage efficiency in the available space at the lowest possible cost.  Here's a cost comparison of CMP and chambers
Six Re-Use Applications for Rainwater Harvesting
Irrigation is the most common application for harvested water. Treatment requirements are lower, which makes the harvesting system simpler, and the demand can quickly drain the cistern to make room for the next storm event. However, relying solely on irrigation for net-annual runoff reduction is rarely enough. In most locations, there is significant rainfall and irrigation is unnecessary. To get meaningful runoff reduction on a net annual basis, engineers will need to find additional applications beyond irrigation.
The Stormwater Blog was created in the spirit of sharing information with the stormwater community (and the stormwater curious) and we feel it is important to pass on valuable resources, both locally and internationally.
Choosing the Right LID Solution – A Hierarchical Approach
With LID, not all solutions are created equal. There is a hierarchy in the regulations for what is the preferred technology. So it’s not so much is it approved or not approved… there are certain preferred technologies that must be considered first, and if that doesn’t work, you consider the next option in preference. This is a huge difference in conventional stormwater regulations, which says technologies must be approved by state of local jurisdictions – and then everything is on a level playing field. 
Decreasing Long-Term Maintenance Costs of Filtration Systems
Filtering stormwater is an effective way to remove the most challenging pollutants from urban runoff - including fine solids, soluble heavy metals, and total nutrients. Though the physics of filtration are the same, there are many variables to consider when designing a stormwater filtration system. It’s important when designing a filter treatment system to consider a balanced approach that incorporates performance, hydraulics, longevity and life cycle costs.
Seven Maintenance Considerations for Stormwater Filtration Systems
All stormwater BMP’s will require maintenance at some time or time interval. Long-term maintenance costs and maintainability are very important considerations. Here are some other things you should consider when discussing maintenance of your stormwater filtration system.
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