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  2. External floating roof tank - Wikipedia

    en.wikipedia.org/wiki/External_floating_roof_tank

    External floating roof tank

  3. Downspout - Wikipedia

    en.wikipedia.org/wiki/Downspout

    Downspout - Wikipedia ... Downspout

  4. Blue roof - Wikipedia

    en.wikipedia.org/wiki/Blue_roof

    A blue roof is a roof of a building that is designed explicitly to provide initial temporary water storage and then gradual release of stored water, typically rainfall. . Blue roofs are constructed on flat or low sloped roofs in urban communities where flooding is a risk due to a lack of permeable surfaces for water to infiltrate, or seep back into the gr

  5. Rain gutter - Wikipedia

    en.wikipedia.org/wiki/Rain_gutter

    Rain gutter - Wikipedia ... Rain gutter

  6. Surface runoff - Wikipedia

    en.wikipedia.org/wiki/Surface_runoff

    Surface runoff - Wikipedia ... Surface runoff

  7. Leader head - Wikipedia

    en.wikipedia.org/wiki/Leader_Head

    Purpose. The purpose of a leader head is to help transfer excess water from the roof onto downspouts, thus preventing the gutters from overflowing and water washing over the walls, which is a common occurrence in areas susceptible to heavy rain cycles. The use of leader heads also offers other benefits to the drainage system.

  8. Drainage equation - Wikipedia

    en.wikipedia.org/wiki/Drainage_equation

    A drainage equation is an equation describing the relation between depth and spacing of parallel subsurface drains, depth of the watertable, depth and hydraulic conductivity of the soils. It is used in drainage design. Parameters in Hooghoudt's drainage equation. A well known steady-state drainage equation is the Hooghoudt drain spacing equation.

  9. French drain - Wikipedia

    en.wikipedia.org/wiki/French_drain

    French drain - Wikipedia ... French drain

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