Drainage is the difference between a course that opens the morning after a storm and one that loses a week of revenue. In India, where a single monsoon night can deliver more rain than some courses in Europe see in a month, drainage is not a detail of construction. It is the construction. This is how SGDC India approaches it.
Start with the surface
The cheapest drainage is gravity. Fairways shaped with positive surface fall, greens with surface drainage in at least two directions and approaches that do not pool are the first line of defence. Good shaping in construction saves pipe for the life of the course.
Greens drainage
Greens built to USGA specification have a herringbone or grid of perforated pipe in a gravel layer under a sand rootzone. Water moves through the rootzone, into the gravel and out through the pipe within hours. On older push-up greens, retrofit drainage and sand topdressing programmes are the usual remedy.
Bunker drainage
Bunkers are where drainage fails most visibly. Capillary bunker construction drains at 100 inches per hour through a liner that also holds moisture in the sand so faces do not wash. Combined with a Capillary Wash Box, contaminated sand can be washed in place after a storm rather than replaced.
Fairway and rough drainage
Low areas that pool need pipe drainage: collector drains, laterals and catch basins leading to outfalls or lakes. Sand slit drainage and sand banding help heavy soils shed water faster. The design must respect the routing, so trenches do not undermine tees and greens.
Lakes and outfalls
Lakes are part of the drainage system as well as the irrigation supply. Sized correctly, they absorb storm peaks; aerated with Otterbine fountains or diffused aeration, they stay clean enough to irrigate from.
Products that keep courses open
- Capillary Material under bunkers and, increasingly, under tees and greens.
- Perforated pipe and catch basins sized to Indian rainfall intensity, not temperate assumptions.
- Wiedenmann deep aeration and core aeration to keep soils open through the season.
- Wessex and Wiedenmann sweepers to clear debris that blocks surface drains.
Maintenance
Drainage fails from neglect more than from design. Catch basins silt up, outfalls grow over, aeration gets skipped in a busy season. A monsoon-readiness programme each May pays for itself in the first storm.
Working with SGDC
SGDC designs and installs drainage as part of new course construction and as standalone renovation projects, and supplies the machinery that keeps it working. Contact us with the problem areas on your course and we will walk them with you before the next monsoon.
