Page 222 - 《水资源与水工程学报》2023年第4期
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                 JtypeisB(good)andGtypeisD(unqualified)whentheinletpressurefallintherangeof1-11m.
                 3
                 Whenthelayinglengthis100m ,thequalityofJtypedripirrigationbeltisA(excellent)undertheinlet
                 pressureof1-11m;GtypeisC(general)undertheinletpressureof1-3m.Withtheuniformityco
                 efficient E andC asthediscriminantindices,theirrigationuniformityofJtypedripirrigationbeltisthe
                         u
                               u
                 lowestwhenthelayinglengthis300m,anditisthehighestwhentheinletpressureis9-11m.Based
                 ontheabovecriteria,theoptimalcombinationoflayinglengthandinletpressureofdifferentdripirriga
                 tionbeltsareasfollows :thelengthis200m,theinletpressureis9mforJtypedripirrigationbelt;the
                                                                                1
                 lengthis200m ,theinletpressureis11mforJtypeandJtypedripirrigationbelt;thelengthis100
                                                         2
                                                                    3
                 m,theinletpressureis7mforGtypedripirrigationbelt.
                 Keywords:dripirrigation;importedlowdischargedripirrigationbelt;irrigationuniformity;laying
                 length;inletpressure
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