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<br />WATER MANAGEMENT <br />Endnote -- MATER MANAGEMENT--Continued <br /> <br />PACE S OF 3 <br />OB/8/00 <br />IRRIGATION is the controlled application of water to supplement rainfall and support plant growth. The design <br />and management of an irrigation system are affected by depth to the water table, the need for drainage, flooding, <br />available water capacity, intake rate, permeability, erosion hazard, and slope. The construction of a system is affected <br />by large stones and depth to bedrock or to a cemented pan. The performance of a system is affected by the depth of the <br />root zone, the amount of salts or sodium, and soil reaction. <br />TERRACES AND DIVERSIONS are enbankments or a cambinati on of channels and ridges constructed across a slope to control <br />erosion and conserve moisture by intercepting runoff. Slope, wetness, large stones, and depth to bedrock or to a <br />cemented pan affect the construction of terraces and diversions. A restricted rooting depth, a severe hazard of <br />wind or water erosion, an excessively coarse texture, and restricted permeability adversely affect maintenance. <br />GRASSED YATERYAYS are natural or constructed channels, generally broad and shallow, that conduct surface water to <br />outlets at a nonerosive velocity. Large stones, wetness, slope, and depth to bedrock or to a cemented pan affect the <br />construction of grassed waterways. A hazard of rib erosion, low available water capacity, restricted rooting <br />depth, toxic substances such as salts or sodium, and restricted permeability adversely affect the growth and <br />maintenance of the grass after construction. <br />