Click on “Download PDF” for the PDF version or on the title for the HTML version. If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options. Design and Construction of Surface Drainage Systems on Agricultural Lands in Humid AreasPublished by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org ASAE ANSI/ASAE EP302.4 February 1993Keywords: Drainage, Erosion, Humid, Surface 1 Purpose 1.1 This Engineering Practice is intended to improve the design, construction and maintenance of surface drainage systems which are adapted to modern farm mechanization. It is limited to agricultural or farm-size areas, 259 ha (640 ac) or less, in the humid region of the eastern USA (see figure 1.2 Surface drainage is normally required for efficient crop production on slowly permeable soils with restrictive topography. It is not required when excess water is removed naturally. Typical problem areas are glaciated areas, coastal plains, bottomlands, deltas, and old lake beds. Surface drainage may eliminate the need for subsurface drains under certain conditions. Surface drains also apply to farm mains used to collect water from field drains and subsurface drains. (Download PDF) (Export to EndNotes)
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