Identifying external nutrient reduction requirements and potential in the hypereutrophic Lake Taihu Basin, China
- 174 Downloads
Reducing external nutrient loads is the first step for controlling eutrophication. Here, we identified external nutrient reduction requirements and potential of strategies for achieving reductions to remediate a eutrophic water body, Lake Taihu, China. A mass balance approach based on the entire lake was used to identify nutrient reduction requirements; an empirical export coefficient approach was introduced to estimate the nutrient reduction potential of the overall program on integrated regulation of Taihu Lake Basin (hereafter referred to as the “Guideline”). Reduction requirements included external total nitrogen (TN) and total phosphorus (TP) loads, which should be reduced by 41–55 and 25–50%, respectively, to prevent nutrient accumulation in Lake Taihu and to meet the planned water quality targets. In 2010, which is the most seriously polluted calendar year during the 2008–2014 period, the nutrient reduction requirements were estimated to be 36,819 tons of N and 2442 tons of P, and the potential nutrient reduction strategies would reduce approximately 25,821 tons of N and 3024 tons of P. Since there is a net N remaining in the reduction requirements, it should be the focus and deserves more attention in identifying external nutrient reduction strategies. Moreover, abatement measures outlined in the Guideline with high P reduction potential required large monetary investments. Achieving TP reduction requirement using the cost-effective strategy costs about 80.24 million USD. The design of nutrient reduction strategies should be enacted according to regional and sectoral differences and the cost-effectiveness of abatement measures.
KeywordsNutrient Reduction requirements Reduction potential Reduction cost Eutrophication An entire lake The overall program on integrated regulation of Taihu Lake Basin
This study was supported by the Research Project of Taihu Lake Water Pollution Control of Jiangsu Province (TH2010301), National Natural Science Foundation of China (No. 40976021) and the Project Sponsored by the Scientific Research Foundation of Guangxi University (XGZ150300). We would like to thank Xue Liu for her help in english writing and her scientific suggestions.
- Chapra SC (2003) Engineering water quality models and TMDLs. J Water Resour Plan Manage 129(4):247–256. https://doi.org/10.1061/(ASCE)0733-9496(2003)129:4(247) CrossRefGoogle Scholar
- Chapra SC, Wicke HD, Heidtke TM (1983) Effectiveness of treatment to meet phosphorus objectives in the Great Lakes. J Water Poll Control Fed 55(1):81–91Google Scholar
- Hu K, Pang Y, Wang H (2012) On the total nitrogen balance and water quality controllable target in Taihu Lake. Adv Water Sci 23(4):555–562. https://doi.org/10.14042/j.cnki.32.1309.2012.04.005. (in Chinese)Google Scholar
- NDRC (2008, 2013) National Development and reform commission. The overall program on integrated regulation of Taihu Lake Basin (in Chinese), National Development and Reform Comission web http://www.sdpc.gov.cn/fzgggz/ dqjj/zhdt/201401/t20140114.html. Accessed 14 Jan 2014 (in Chinese)
- Pu PM, Wang GX, Hu CH, Hu WP, Fan CX (2000) Can we control lake eutrophication by dredging. J Lake Sci 12(3):269–279. https://doi.org/10.3321/j.issn:1003-5427.2000.03.012. (in Chinese)CrossRefGoogle Scholar
- THHR (2008–2014) Health report of Lake Taihu in 2008–2014. Taihu Basin Authority web http://www.tba.gov.cn/tba/content/TBA/lygb/index.html. Accessed 1 Nov 2016. (in Chinese)
- Wang SM, Dou HS, Chen KZ et al (1998) China lakes record. Science Press, Beijing. (in Chinese)Google Scholar
- Xia M, Bian B, and Wang Z (2012) Technique of total amount control for pollutants and its comprehensive application in a heavily polluted area of Taihu lake basin. China Environmental Science Press, Beiijng. (in Chinese)Google Scholar
- Xue B, Yao SC, Wang SM, Xia WL (2007) Enrichment of nutrient and analysis of its reason in sediments of different kinds of lakes at middle and lower Yangze river basin. Quat Sci 27(1):122–127. https://doi.org/10.3321/j.issn:1001-7410.2007.01.015. (in Chinese)Google Scholar
- Yu JH, Ding SM, Zhong JC, Fan CX, Chen QW, Yin HB, Zhang L Zhang YL (2017) Evaluation of simulated dredging to control internal phosphorus release from sediments: focused on phosphorus transfer and resupply across the sediment-water interface. Sci Total Environ 592:662–673. https://doi.org/10.1016/j.scitotenv.2017.02.219 CrossRefGoogle Scholar