Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla Babban manufar dam din shi ne canja wurin ruwa don ban ruwa.
Tabbas, mafi mahimmancin jumlar ita ce "Manufar farko ta dam ita ce ban ruwa kuma lokacin da aka kammala, tafkinsa zai tura ruwa zuwa arewa ta hanyar rami da tashoshi zuwa yankin Chaparabad. "