Concentrations of Flow

Posted on August 30, 2011September 6, 2024Categories TECHNICALTags

The principle of Concentrations of Flow appears in many aspects of drainage. Understanding that it is critical to proper drainage design. It simply states that as water moves from larger areas through smaller areas, flow rates increase.

Concentration of FlowWe see this every day on our golf courses when water runs off of hillsides. Not only is the bottom of the slope the wettest, but areas that run between mounds or valleys where the flow travels will be the wettest. These areas have to handle not only the water that is falling on the flow area, but the water that has fallen on the watershed above it. If we don’t collect this water before it concentrates in these areas, the heavy Concentrations …

The Farm Completes 18-Hole Drainage Project in 6 Months

Posted on July 9, 2010September 6, 2024Categories PROJECTS
Trey Cutshall contacted Turf Drainage Co. of America at the beginning of December to do a complete drainage plan on the course. The contractor, Siphon Systems, Inc. out of Jupiter, FL, was able to finish the project on schedule and on budget by June 30th, 2010. Over 100,000 feet of pipe were installed in less than 6 months.
Trey Cutshall contacted Turf Drainage Co. of America at the beginning of December to do a complete drainage plan on the course. The contractor, Siphon Systems, Inc. out of Jupiter, FL, was able to finish the project on schedule and on budget by June 30th, 2010. Over 100,000 feet of pipe were installed in less than 6 months.

West Coast: Olympic Club, San Francisco, CA

Posted on January 9, 2010September 6, 2024Categories PROJECTS
The 11th hole of the Ocean Course at The Olympic Club in San Francisco is a picturesque uphill par 5 with plenty of surface slope, but has been plagued with a wet fairway caused by poor seepage drainage. TDA designed a system of surface and seepage collection to tie into an existing large pipe...
The 11th hole of the Ocean Course at The Olympic Club in San Francisco is a picturesque uphill par 5 with plenty of surface slope, but has been plagued with a wet fairway caused by poor seepage drainage. TDA designed a system of surface and seepage collection to tie into an existing large pipe...

Particle sizing: Why gravel should not be used in fairway drainage

Posted on October 9, 2009September 6, 2024Categories TECHNICAL
We at Turf Drainage Co. of America have always advised against the use of gravel in fairway drainage installations. The correct solution is to use a properly sized sand as the backfill material. Let the designers at TDA show you how you can build a technically correct system at your course.
We at Turf Drainage Co. of America have always advised against the use of gravel in fairway drainage installations. The correct solution is to use a properly sized sand as the backfill material. Let the designers at TDA show you how you can build a technically correct system at your course.

Drive-Over Rubber Curbing easy and effective

Posted on July 9, 2009September 6, 2024Categories PRODUCT
Wide sheet flows can make a mess of fairway areas. Drive over rubber curbing can be used to change sheet flow that is coming across cart paths into stream flow that can be easily collected by a single drainage basin.
Wide sheet flows can make a mess of fairway areas. Drive over rubber curbing can be used to change sheet flow that is coming across cart paths into stream flow that can be easily collected by a single drainage basin.

Sequoia Greenscapes renovates bunkers

Posted on July 1, 2009September 6, 2024Categories PROJECTS
By using Turf Drain without gravel, we can stop the movement of the water along the sub-grade that causes the sand to erode, without fear of gravel contaminating the playing surface.
By using Turf Drain without gravel, we can stop the movement of the water along the sub-grade that causes the sand to erode, without fear of gravel contaminating the playing surface.

TPC Southwind uses tarp system on in-house drainage project

Posted on July 1, 2009September 6, 2024Categories CUSTOMER PROFILE, PRODUCT, PROJECTSTags , ,
Jim Thomas, CGCS at TPC Southwind, purchased the Turf Drain Tarp System prior to tackling an in-house drainage project this spring. The tarp system saves 80% of labor needed to move the spoils, compared to using plywood and utility vehicles.
Jim Thomas, CGCS at TPC Southwind, purchased the Turf Drain Tarp System prior to tackling an in-house drainage project this spring. The tarp system saves 80% of labor needed to move the spoils, compared to using plywood and utility vehicles.

TDA miniaturizes electricity-free pumps

Posted on July 1, 2009September 6, 2024Categories PRODUCT
The superintendent can use the existing outfall pipe as the relief. The Mini IDP will lift the water up to the existing outfall without the need to run electrical service to the site.
The superintendent can use the existing outfall pipe as the relief. The Mini IDP will lift the water up to the existing outfall without the need to run electrical service to the site.

Self Cleaning Velocity

Posted on October 9, 2008September 6, 2024Categories TECHNICAL


With conventional drainage, the pipe needs to be installed with enough grade that the water flowing through the pipe will have enough velocity that contaminants won’t clog the system over time, thus the term “self cleaning velocity.” Self Cleaning Velocity in drainage manuals is stated as a minimum flow of 3 feet per second. At this flow rate, a pipe will be flushed of contaminants and remain open.

The slope needed for a pipe to maintain this velocity is based on the Manning number of the pipe. This number calculates the friction as the result of wall construction and diameter. It is generally accepted that smoothwall 4″ pipe placed at a 1% slope will provide adequate velocity in a system …

Build your basin to match your drainage problem

Posted on October 1, 2008September 6, 2024Categories PRODUCT
Our patented Perma Basins are ideal for collecting water from the ground profile at different depths. These basins not only collect surface water, but have permeable sidewalls to collect seepage water.
Our patented Perma Basins are ideal for collecting water from the ground profile at different depths. These basins not only collect surface water, but have permeable sidewalls to collect seepage water.