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i <br />I~ <br />LJ <br />1 <br />~gineering interpreations cont~d <br />able material. <br />Pond reservoir areas hold water behind a dam or emba.nk- <br />ment, Soils suitable for pond reservoir areas have low <br />seepage, which is related to their permeability and <br />depth to fractured or permeable bedrock or other perme- <br />~nbsnkments, dikes and levees require soil material <br />resistant to seepage any' pioinrz of favorable stability, <br />shrink-swell potential, shear strencth, and comoact- <br />ability, presence of stones or organic materiel in a <br />soil are among factors that ere unfavorable, <br />Drsinaee of cropland an3 pasture is affected by such <br />soil properties~ss permeability, texture, and struct~ire; <br />depth to cls?pan, rock, or other layers that influence <br />rata of water movement; depth to the water table; sl~~pe; <br />stability in ditchbanks; susceptibility to stream ov3r- <br />flow; salinity or alkalinit?; an3 availability of out- <br />lets for drainage. <br />or soil blowing: soil texture: content of stones; <br />accumulations of salts and alkali; depth of root zon~~; <br />rate of water intake at the surface; permeabilit? of <br />Irrigation of s soil is affected b? such features as <br />slope: susceptibility to stream overflow, water eros'.:on <br />soil layers below the surface layer; amount of ~.+ater <br />held available to plants; and used for drainage, or <br />depth to water table or bedrock. <br />Terraces and diversions are embankments, or ridges, <br />constructed across the slope to intercept runoff so <br />that it soaks into the soil or flo'~s slowly to s <br />prepared outlet, '=eatures that affect suitability of a <br />soil for terraces are uniformit? and steepness of <br />slope; depth to bedrock or other unfavorable material; <br />presence of stones; permeability; end resistance to <br />water erosion, soil slipping, and soil blowinc, A soil <br />suitable for these structures provides outlets for run- <br />off and is not difficult to veeetste, <br /> <br />.. ._..-u.-.a:.c~-mil- _. _ya~-~.B-~_-r.. .,. il. ,_ _ _ _ _ _ _v.. -may <br />