Research on the carrying capacity of intra-provincial rivers in Bac Ninh province

Abstract

The article presented the research results on the carrying capacity of some intra-provincial rivers in Bac Ninh province,
using indirect assessment methods to assess the capacity of receiving wastewater and the carrying capacity of the river.
The results of this study were the basis for Bac Ninh province to publish information on the environment of rivers and river sections that are no longer capable of carrying loads. The results showed that the whole Ngu Huyen Khe river was polluted, and no longer capable of receiving more pollutant loads of waste sources. For the Tao Khe river, section 1 of the river was still capable of receiving additional loads; from section 2 to section 6, the water quality indicators were completely unable to receive additional pollutant loads from waste sources. For Ngu river, section 1 and section 2, water quality was severely degraded, however, from section 3 to section 6, the water quality was somewhat improved. For Dau river, the whole river has reduced water quality and was no longer able to accept the pollutant load from the discharge sources. For Bui river, the water quality can be assessed as slightly polluted. For Dong Khoi river, the whole river had quite good water quality. Comparing pollution levels among rivers showed that the pollution level of Ngu Huyen Khe river, Dau river and Tao Khe river was the highest, and the ability to receive wastewater was almost no longer available.
The rivers with less pollution were the Ngu and Bui rivers, the river with the best water quality is the Dong Khoi river.