They then set about building a main channel six meters wide and over 20 km long which they called "Kou River Channel." This carried water to the reclamation area and, through a system of smaller irrigation channels, into the paddy fields.
接著測量、施工，依地形興建了寬六公尺，總長二十多公里的主渠道，取名「姑河渠」，引姑河之水進入墾區，再從主渠道接到支渠，進入稻田。