direct design methoddirect expensesdirect flexibilitydirect flowdirect interview methoddirect irrigation systemdirect jumpdirect precessiondirect receiptdirect runoffdirect sheardirect shear apparatusdirect shear stressdirect shear testdirect spiffinessdirect supportdirect tensile testdirect weldeddirectiondirection cosinedirection finderdirection finding tubedirection of trafficdirection pegdirection peg linedirectional derivativedirectional hydraulic conductivitydirectional islanddirectional signdirectivity patterndirectrixdisaggregationdisassemblingdiscdisc harrowdischargedischarge channeldischarge coefficientdischarge headdischarge hydrographdischarge lampdischarge linedischarge numberdischarge of groundwaterdischarge of soliddischarge of the overflowdischarge scale ratiodischarge section areadischarge velocitydiscoloration
