TAILIEUCHUNG - Báo cáo " PRELIMINARY ASSESSMENT AND SIMULATION OF THE WATER QUALITY OF CAU RIVER, BAC NINH PROVINCE BY MATHEMATICAL MODEL "

For the last two decades, Vietnam has achieved great developments in economic. Our country is in the middle of industrialization and modernization process. But side-effects of economic developments which is greater than ever are environmental problems, especially water pollution. At present, with the pressure of environmental pollution, river water quality is showing signs of pollution at some degrees. For the season, it is necessary to assessing and monitoring river water quality, then using models to simulate water quality to propose managing strategies. In order to contribute and improving the water quality model for Cau River, we carried out the research: “Preliminary assessment and simulation of the water quality. | VNU. JOURNAL OF SCIENCE Nat. Sci. Tech. N02 2005 PRELIMINARY ASSESSMENT AND SIMULATION OF THE WATER QUALITY OF CAU RIVER BAC NINH PROVINCE BY MATHEMATICAL MODEL Luu Lan Huong Ho Minh Hiep College of Science Vietnam National University Hanoi 1. Introduction For the last two decades Vietnam has achieved great developments in economic. Our country is in the middle of industrialization and modernization process. But side-effects of economic developments which is greater than ever are environmental problems especially water pollution. At present with the pressure of environmental pollution river water quality is showing signs of pollution at some degrees. For the season it is necessary to assessing and monitoring river water quality then using models to simulate water quality to propose managing strategies. In order to contribute and improving the water quality model for Cau River we carried out the research Preliminary assessment and simulation of the water quality of Cau River Bac Ninh province by mathematical model . 2. Materials and methods . Study site Cau River basin lies in coordinates of 21007 - 22018 North latitude 105028 - 106008 East longitude. The area of basin is about 6 030 km2 it runs through six provinces Bac Kan Thai Nguyen Bac Ninh Bac Giang Vinh Phuc and Hai Duong. The study site is a fragment running through Bac Ninh Province it has the length of 63 km beginning at Tam Giang Commune Yen Phong District and ending at Duc Long Commune Que Vo District. The water samples were taken at twenty points along the stream. . Methods Inheritance method. Statistics analyzing collecting and assessing base on the earlier documents. Modeling method by QUAL2E model 5 6 . 3. Results and discussion . Water quality assessment of Cau River Bac Ninh Province Table 1. Results of water quality analysis of Cau River Samples pH SS mg l DO mg l BOD mg l COD mg l N-NH4 mg l Pesticide mg l Detergent mg l Coliform MNP 100ml M1 85 .

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