Abstract
Based on the statistical data of social-economic state and development planning to 2025 of Binh Dinh province, the pollution load from development activities has been calculated by using the environmental rapid assessment method. The results showed that development activities in Binh Dinh province create about 30.7, thousand tons of COD;17.1 thousand tons of BOD; 9.1 thousand tons of Nitrogen; 6.5 thousand tons of Phosphorous and 379 thousand tons of TSS from living activities, aquaculture, industry, farming and land leaching. Until 2025, this amount will be increased 1.4 - 2.6 times. The main pollution sources are from living activities including residents and tourists and livestock farming. Therefore, treatment of waste from these sources is very necessary to minimize the waste amount discharged into the Thi Nai Lagoon.
Highlights
Thi Nai lagoon which located in Binh Dinh province is a tropical salty brackish lagoon with the area about 5,060ha, the length of over 10km and width of about 4km
Con River is over 178km in length with total basin area approximately 3,067km2 and flow velocity 58.84m3/s
Flood and leaching seriously happens, whereas drought occurs in the dry season.Flow velocity differencebetween two seasons is more than 1,000 times (Geography of provinces and cities in Vietnam, Volume 4)
Summary
Thi Nai lagoon which located in Binh Dinh province is a tropical salty brackish lagoon with the area about 5,060ha, the length of over 10km and width of about 4km. Con River is over 178km in length with total basin area approximately 3,067km and flow velocity 58.84m3/s. Ha Thanh river is 58km in length with total basin area of about 580km and flow velocity 13.6m3/s. This article has presented the results of calculating thecurrently pollution load generated from residential sources, industry, aquaculture, livestock farming, soil leaching and prediction to 2025 based on socialeconomic stateand development planning of Binh Dinh province. With the characteristic terrain and hydrological conditions, it is could be said that capable development activities and soil leaching in Quy Nhon city, Tuy Phuoc, An Nhon district, Tay Son district and a part of Nam Vinh Thanh district (Con and Ha Thanh river downstream - the main water supply for the Thi Nai Lagoon). + Decision No 54/2009/QD-TTg by the Prime Minister on approving the social - economic overall development planning in Binh Dinh province until 2020; + Decision No 660/QD-UBNDdated 2009 on approving the land use planning in Tuy Phuoc district to 2020 integrating with the environmental protection requirements and climate change issued by Binh Dinh province. + Decision No 52/QD-UBND dated January 19, 2012 of Binh Dinh People's Committee on adjusting and supplementing the industrial parks development planning in Binh Dinh province until 2020 and orientation to 2025
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