etude de la qualite des eaux d'un hydrosysteme fluvial ... - LTHE

1. The Nhue-To Lich river basins1.1. TopographyFigure 1.1.1: Map of the Hanoi city1.1.1. Position of the Nhue riverThe Nhue river, as a branch of the Red river, takes its source from the Red river at ThuyPhuong gate in the north west of Hanoi city. Like other rivers running in the northern delta ofVietnam, the Nhue river flows south and southeast throughout its course without anyredirection or disruption. At several portions, its course was straightly rebuilt during Frenchcolonization for irrigation and naval transportation. The Nhue river basin is bordered by theRed river in the north and the east, the Day river in the west, Chau Giang river in the south. Inthe west, the Day river almost runs parallel to the Nhue river at the distance of 10 km. In thesouth, the Nhue river joins the Chau Giang river at the Luong Co gate, 72 km from its source.7