Multisource Disaster Chain and Control in Regional Water Environment of the Dongjiang Lake in China
- 1 School of Resources and Safety Engineering, Central South University, Changsha, China
- 2 School of Resources and Safety Engineering, Central South University, Changsha, China
Abstract
On the background of analysis on region water environment safety in the Dongjiang Lake of south-central China, the source of pollution of water environment and its control are studied. The concept of region environment disaster chain is put forward on the basis of combination study on the disaster chain theory and pollution problem in regional water environment. Through identification and analysis of pollution disaster resources in regional water environment of the Dongjiang Lake, the annual emission of the chemical oxygen demand (COD), ammonia nitrogen, total phosphorus (TP) and heavy metal (Cd, As, Pb) are counted. According to evaluation on structure proportion of contaminants in the Dongjiang Lake, agricultural non-point source is the uppermost pollution source, which accounted for 87.74% in total pollution load. Ammonia nitrogen, TP and COD are mainly contaminants accounted for 94.27% in total pollution load. By analyzing danger of contaminants in the lake, basic form of disaster chain of water environment pollution is built elementarily. It shows characteristics of branches and trunk basin disaster chain and embodies multisource disaster implication chain caused by human activities. Then, disaster resources chain-cutting methods for pollution prevention and control of regional water environment of the Dongjiang Lake are analyzed.
- Zhang, X.B. and Li, X. (2013) Research on the Progress and Tendency of Water Environment Safety in China. Safety and Environment Engineering, 1, 122-137.
- Guo, Z.J. and Qin, B.Y. (1987) Brief Discussion on Disaster Physics. Journal of Catastrophology, 2, 25-33.
- Wen, C.J. (2000) Generalized Disaster, Disaster Chain and Their Prevention and Control. Journal of Catastrophology, 4, 13-18.
- Shi, P.J. (2002) Theory on Disaster Science and Disaster Dynamic. Journal of Natural Disasters, 3, 1-9.
- Men, K.P. and Gao, J.G. (2008) Severe Disaster Chain and Its Defense. Progress in Geophysics, 1, 270-275.
- Xiao, S.X. (2006) Catastrophic Chain-Styled Theory and Application. Science Press, Beijing.
- Academic Department of China Association for Science and Technology (2009) Evolution Process, ForecastingMethodsand Countermeasure of Major Disaster Chain. Press of Science and Technology of China, Beijing.
- Peng, Y.H. and Zhou, K.P. (2014) Case Study on Evolution of Industry Structure and the Response of Water Environment of Dongjiang Lake Basin. Acta Agriculturae Universitatis Jinangxiensis, 5, 1152-1158.
- Hunan Provincial Environmental Protection Science Academy (2010) The Dongjiang Lake Basin Water Environment Protection Plan.
- He, W., Ou, L.Y., Chen, X.Y., Zhang, Z.J., Liao, F.C., Huang, X.R. and Zeng, C.F. (2009) Dynamic Changes and Evaluation of Fisheries Water in Dongjian Lake. Journal of Hydroecology, 2, 139-144.
- Xiao, S.X. (2006) Originality Structure Sketch on Chain-Styled Theory of Disaster in Eco-Environment. Chinese Journal of Rock Mechanics and Engineering, 1, 2593-2602.
- Xiao, S.X., Sui, Y.C., Liu, W.F. and Zhou, J.F. (2007) Application of Chain-Cutting Disaster Mitigation from Gestation Source to Preventing Land Desertification. Journal of Chongqing Jiao Tong University, 3, 149-152.
- Wesstrom, I., Joel, A. and Messing, I. (2014) Controlled Drainage and Subirrigation—A Water Management Option to Reduce Non-Point Source Pollution from Agricultural Land. Agriculture Ecosystems & Environment, 12, 74-82. http://dx.doi.org/10.1016/j.agee.2014.03.017