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5、 .4.2 4.2.1 - , (. 2).m = 2 10 ;m = 1 10 ;n =0,5;Y ;0 ;X - (. 7749-1). - 7749-1. 2 - 4.2.2 , 2.5 . , - .4.2.3 (CDU) .4.3 . , .- 2. 2 , , 12c163 2020 , - . , , - (90) . , . (CDU) A. A() A.1 . , . . - ., - .2 1)(CDU)CDU = 100 1 c45c45c230c232c231c231c246c248c247c247c83|,hhnhmim n ;hm ;hi ;c83|hhmic45 .1)J.E.Christiansen, Irrigation by Sprinkling, Bulletin 670, University of California, Berkeley, 1942 (, , 670, , , 1942).4 7749-22004.3 . . . , ( , , ) :a) 2;b) - ;c) ;d) , . . , , , - , . - .4 100 % . .5 -
