The Stormwater Blog 

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

Four Rainwater Harvesting Cistern Design Considerations
Rainwater Harvesting does not have a long history of use in modern site design, but now that it is a topic of interest, many engineers have questions about this new practice. Many of these questions center on cisterns, which are at the heart of every rainwater harvester system. This post looks at four rainwater harvesting cistern design considerations – sizing, design life, structural capacity and installation.
Thinking Outside The Box: Infiltration System Layouts
Historically, underground infiltration beds have been laid out in either square or rectangular shapes, sometimes far away from where the actual rain drops fall. These large systems are typically fed by a series of upstream catch basins and conveyance pipes. Several factors contribute to site layout, but mostly it simplifies the hydrologic and hydraulic modeling process, and keeps infiltration beds away from more sensitive underground infrastructure.
Leaves, Trees, and Stormwater BMPs: Designing with Maintenance in Mind
Preserving large trees as runoff interceptors is an integral part of low impact development as well as incorporating trees and vegetation in filtration beds, rain gardens, and bioretention systems. These systems are extremely beneficial and provide essential functions of the natural landscape: infiltration, evaporation, transpiration, interception, and shading.
Traditional stormwater criteria require both improving the quality and managing the quantity of runoff. One of the best practices is to incorporate pretreatment, detention and treatment into an integrated system. This approach can meet total daily maximum load requirements by providing a high level of pollutant removal and preventing erosion damage from peak flows. Many areas may require only some of these processes while some areas may require all of them.
Stormwater Infiltration: Drain-Down Characteristics of Hydrologic Soil Groups
Infiltration plays an increasingly important role in meeting stormwater runoff mitigation regulations. One of the primary considerations for infiltration feasibility is the runoff routing. Infiltration systems must drain in a reasonable amount of time to avoid creating mosquito habitat and to recover storage volume for subsequent storms.
Categories: Infiltration
Comparison of Materials Choices for Rainwater Harvesting Cisterns
There are a wide variety of cistern materials to choose from. Because they are often smaller in size, residential systems offer more options, but not all will scale to tens of thousands of gallons in a cost-effective manner. This article focuses on commercial and institutional scale projects where storage requirements are thousands of gallons and larger.
Structural Considerations for Stormwater Control Measures
As the need for effective stormwater treatment and volume control grows, so does the number of available stormwater control measures (SCMs) such as filtration systems, hydrodynamic separators, bio-retention  systems, green roofs and pervious pavement. As part of their due diligence, engineers go through an evaluation process to determine if the proposed system will meet some basic criteria, one of which is structural considerations. Below are some of the structural considerations.  The engineer should not assume that because a SCM is approved and/or detailed in a manual that all of the structural issues have been addressed. 
Stormwater BMPs: It’s All About Maintenance
As a state stormwater regulator, I see many stormwater plans. These plans detail everything that would be done to protect water quality and prevent erosion. Yet even a well-written and well-executed BMP plan will not provide the intended service without proper maintenance.
Categories: Maintenance
Three Components of Infiltration System Design
Common infiltration practices include drywells, bioretention, permeable pavement, infiltration trenches, infiltration basins, and subsurface infiltration galleries. Regardless of their form, all infiltration systems have three primary components: storage, treatment, and infiltration.
Categories: Infiltration
Contech CDS Solution Used in Award Winning Stormwater Project

The City of Los Angeles Bureau of Sanitation received the Outstanding Stormwater Best Management Practice (BMP) Implementation Award for its Garvanza Park Stormwater BMP Project from the California Stormwater Quality Association (CASQA). 

Page 5 of 9First   Previous   1  2  3  4  [5]  6  7  8  9  Next   Last   

Stormwater Blog Update Hubspot subscription form

We respect your privacy,
your email will only be used to send
Stormwater blog updates.