But the river is very important, which is a serpentine obstacle to trade is causing many of his Majesty the King to dig the Canal to reduce the range of shortcuts for several distances from the sea into the period. Especially in the reign of King Chai was digging the Canal Khlong Bangkok Noi, Bangkok from shortcut to Khlong Bangkok Yai is the area of Thammasat University. THA Phra CHAN to Tha Tien beside the Royal Palace today to change the direction of the River until the Canal expansion wider-cut out becomes a river. The original River path section, narrow and shallow back until the Canal Khlong Bangkok Noi and saphapklai is changed to Bangkok Yai. As a result, this area changes from the same plots of land, split into two plots, with the river current, so the middle of the slit.