Parks and park engineering . Vitrified SewerMethod of Providing Underdrainagef&r Damp or SwampySoil. Surface Water should be Removed bu Inlets andCatch Basins along Upper Sides of Paths and Drioea. FIG. 12. very important. To prevent injury and dislocation to theline, the use of a 12-foot length of cast-iron pipe is recom-mended. This pipe does not have to be perfect. A pieceof seconds can be used to good advantage. Tile drains become clogged in a few years, especiallywhen in the neighborhood of willows and other trees whichabsorb much water. But the drainage process still con-tinues in some m
Parks and park engineering . Vitrified SewerMethod of Providing Underdrainagef&r Damp or SwampySoil. Surface Water should be Removed bu Inlets andCatch Basins along Upper Sides of Paths and Drioea. FIG. 12. very important. To prevent injury and dislocation to theline, the use of a 12-foot length of cast-iron pipe is recom-mended. This pipe does not have to be perfect. A pieceof seconds can be used to good advantage. Tile drains become clogged in a few years, especiallywhen in the neighborhood of willows and other trees whichabsorb much water. But the drainage process still con-tinues in some measure, due to increased porosity of the. SEWERS 43 soil by the dissolving out of soluble matters after thelaying of the tile. Furthermore, the land will never be-come as wet as it originally was on account of the fact thatthe surface water is rapidly disposed of by the surface-waterdrainage system. Secondly, land can be subdrained by the construction ofstone or brush ditches. The principle of action is the sameas in the case of the tile ditches. Stone or poles are placedin the bottom of the trench to provide open space for thepassage of the water. To prevent clogging up with earth,the stone or poles are covered with branches or straw, onwhich the backfilling is deposited. General Remarks. Trenches for underdrainage areusually spaced 50 feet apart. The depth varies from 1^feet to 4 or 5 feet. The slopes should not be less thansay of a foot in 100 feet except for the mains. SEWERS Park sewers are of three kinds: 1. Storm-water Sewers;2. Sanitary Sewers; and 3. Combined Sewers. The methodsof design and construction are in
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishere, booksubjectparks
