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Turf Management: Water Removal and Drainage
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Turf Management: Water Removal and Drainage

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Questions and Answers

What is the main purpose of external drainage?

  • To beautify the landscaping
  • To reduce the amount of rainfall
  • To prevent water from infiltrating the soil
  • To maintain soil's structural capability and improve trafficability (correct)
  • What happens to excess rain or irrigation water that does not infiltrate the soil?

  • It gets absorbed by plants
  • It flows to areas of lower elevation (correct)
  • It disappears into thin air
  • It evaporates quickly
  • Why is it important to remove excess water from the surface?

  • To increase the risk of erosion
  • To reduce the risk of flooding
  • To maintain aesthetic conditions and prevent damage to turf, buildings, and hardscapes (correct)
  • To prevent soil erosion
  • What type of water is considered clean and can be discharged directly into an approved water course or soakaway?

    <p>Surface water</p> Signup and view all the answers

    What type of water is contaminated by domestic waste and requires treatment?

    <p>Effluent</p> Signup and view all the answers

    What are the main forms of excess water in building drainage?

    <p>Surface water and effluent</p> Signup and view all the answers

    What is the purpose of a soakaway?

    <p>To discharge surface water into an approved water course</p> Signup and view all the answers

    Why is external drainage detrimental to the turf and other plant life?

    <p>Because it causes poor aesthetic conditions and destroys turf and plant life</p> Signup and view all the answers

    What is the primary function of a roof drainage system?

    <p>To collect water and debris from the roof</p> Signup and view all the answers

    What is the purpose of a gutter in a roof drainage system?

    <p>To collect water and debris from the roof</p> Signup and view all the answers

    What is the benefit of having a gutter system in a roof drainage system?

    <p>It protects the landscaping from soil erosion and the home's foundation from cracking</p> Signup and view all the answers

    What type of gutter is located on the outside of a building?

    <p>Eaves gutter</p> Signup and view all the answers

    What is the function of a downspout in a roof drainage system?

    <p>To allow water to flow from the gutter to the ground</p> Signup and view all the answers

    What is the purpose of a roof drainage system in terms of soil erosion?

    <p>To reduce the risk of soil erosion</p> Signup and view all the answers

    What is the location of a valley gutter in a building?

    <p>At the intersection of sloping surfaces of a roof</p> Signup and view all the answers

    What are the three types of gutters mentioned in the passage?

    <p>Eaves gutter, box gutter, and valley gutter</p> Signup and view all the answers

    What type of drains are channel drains a variation of?

    <p>Surface drains</p> Signup and view all the answers

    In a standard channel drain installation, what is the purpose of sloping the hardscape surface?

    <p>To direct water to the channel drain</p> Signup and view all the answers

    What is the purpose of erecting a string line at each end of the drain run?

    <p>To guide the laying of the channels to the required level</p> Signup and view all the answers

    Where should the channel installation begin?

    <p>At the discharge end of the run</p> Signup and view all the answers

    What is the purpose of using stakes or rebar to anchor the channel?

    <p>To secure the channel to the trench bed</p> Signup and view all the answers

    What is backfilled into the trench after the channel installation is complete?

    <p>Either concrete, sand, or soil, depending on the application</p> Signup and view all the answers

    What is the purpose of a concrete base in a channel drain installation?

    <p>To provide additional support for heavy loads</p> Signup and view all the answers

    What is the purpose of a catch basin in a drainage system?

    <p>To collect and redirect surface water</p> Signup and view all the answers

    What type of areas are prefabricated drains ideal for?

    <p>Heavy use areas such as athletic fields and golf courses</p> Signup and view all the answers

    What should cover the prefabricated drain in subsurface drainage?

    <p>Sand</p> Signup and view all the answers

    What is the purpose of using temporary wood stakes during prefabricated drain installation?

    <p>To center the drain in the trench</p> Signup and view all the answers

    What is the primary purpose of terracing?

    <p>To move surface runoff water from sloping areas</p> Signup and view all the answers

    Why should excavated soil not be used as backfill?

    <p>It may contain silt or fines</p> Signup and view all the answers

    What is the purpose of flooding the sand with water during prefabricated drain installation?

    <p>To promote proper compaction</p> Signup and view all the answers

    What is the formula to calculate roof catchment capacity?

    <p>Annual rainfall (in mm) x Roof surface area (in m2)</p> Signup and view all the answers

    What is the purpose of the Flo-Well unit and Pop-up emitter?

    <p>To act as discharged points</p> Signup and view all the answers

    What is the least expensive method of removing undesired surface water runoff?

    <p>Natural surface drain swales</p> Signup and view all the answers

    How deep should the drainage trenches be?

    <p>Deep enough to allow appropriate soil cover over the drain</p> Signup and view all the answers

    What is the purpose of a conducting system in a drainage system?

    <p>To channel all around the edge of a sloping roof</p> Signup and view all the answers

    What are the two types of terraces used in turf drainage?

    <p>Bench terraces and tile outlet terraces</p> Signup and view all the answers

    What is the final step in prefabricated drain installation?

    <p>Placing the sod back over the trench</p> Signup and view all the answers

    What are the three major phases of a drainage system?

    <p>Collection, conduction, and dispose</p> Signup and view all the answers

    Where can culverts be installed?

    <p>Under flat work, gravel, or dirt</p> Signup and view all the answers

    What is the purpose of a drainage system?

    <p>To collect, conduct, and dispose of drainage water</p> Signup and view all the answers

    Study Notes

    Excess Water Removal

    • Excess water is detrimental to turf and other plant life and needs to be removed to maintain soil's structural capability and improve trafficability.
    • Excess rain or irrigation water will naturally flow to areas of lower elevation.
    • Surface water is considered clean and can be discharged directly into an approved water course or soakaway.

    Forms of Excess Water

    • Surface water
    • Subsurface water
    • Effluent (water contaminated by domestic waste)

    Drainage Systems

    • Swales: natural surface drain swales are the least expensive method of removing undesired surface water runoff.
    • Terraces: used to move surface runoff water from sloping areas.
    • Culverts: installed under flat work, gravel, or dirt to allow water to pass under an obstruction.

    Good Design Practice

    • A drainage system has 3 major phases: collection, conduction, and disposal of drainage water.
    • The design process involves determining the size of the catchment system, conducting system, and disposal system.

    Roof Drainage System

    • A roof drainage system is installed on the roof to divert water and debris off the roof.
    • Components include gutter systems and downspouts.
    • Gutters collect water and debris from the roof and flow toward the downspout and onto the ground.
    • Three types of gutters: eaves gutter, box gutter, and valley gutter.

    Channel Drain Installation

    • Channel drains are used in hardscapes such as patios, walkways, swimming pools, parking lots, and driveways.
    • The hardscape surface is slightly sloped in one direction or plane to the perimeter channel drain.
    • Standard installation involves excavating a trench, laying the channel, and backfilling with concrete, sand, or soil.

    Catch Basins and Inlets Installation

    • Catch basins are structures with a grate on top used to collect surface water.
    • Ideal for heavy use areas such as athletic fields and golf courses.
    • Subsurface drainage involves installing a prefabricated drain and covering it with sand to the surface.

    Prefabricated Drain Installation

    • The sod is cut and removed from the trench, and the trench is backfilled with select sand.
    • The drain is placed in the trench and centered using temporary wood stakes.
    • The trench is backfilled with sand to bring the backfill up to the top of the trench.
    • The sod is then placed back over the trench.

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    Description

    This quiz covers the importance of removing excess water from turf surfaces, the detrimental effects of waterlogging, and the benefits of proper drainage for soil structure and plant life.

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