0320_An inexact chance-constrained programming model for water quality management...



ESEL Paper Review_20110320    
By Hong Guo

1,Title and Author

An inexact chance-constrained programming model for water quality management in Binhai New Area of Tianjin, China

Authors: Y.L Xie, Y.P. Li, G.H. Huang, Y.F Li, L.R. Chen

MOE KEY Laboratory of Regional Energy Systems Optimization, S-C Energy and Environmental Research Academy, North China Electric Power University, Beijing 102205,China

2, Summary of paper
  This paper talks about the ICC-WQM(inexact-change ) model for the planning regional environmental management under uncertainty. 
  The ICC is based on  an integration of interval linear programming(ILP) and chance-contrained programming(CCP) techniques. It allows  the uncertainties presentedd as both probability distributions and interval values to be incorporated within a general optimization. Although the elements which can affects water envirmental modeling is very complicated, it still by using the applicability of the modling to prospect the water systems. The fuzzy matematical programming and stochastic mathematical programming are both very effective way to deal with uncertainty systems. CCP is one of the main methods of stochastic matematical programming to be effective way to deal with the system such as riverflow and diffusion process of pollutants in the rivers. In the past, most of CCP research are focuse on th water resoure sytem smore than water  water quality management. 
  In this paper , the author  focuse on the CCP and LIP to made the ICC-WQM model for researching the Chinese most dynamic develping district- Tianjin  Binhai New Area.
   The general frame work of the ICC-WQM model for this paper is:
  From this framwork, we can see the author built the water quality model under the steay-state at first. There they study the systems around the river and deside that set the five index(PP- petro chmical industry, OP-marin chamical industry, Enegy utilization industy) to discuss the paper. The the author get the final equation for the system.
  the f is defined as the Net expected system benefit. Because the Tianjian Binhai New area are mainly running the chemical industry, it found that the mostly pollutant is the chemical substance. Then the author set the to the main thing to determine the water quality. Thereore the compare between the  COD discharge amount and total benefit is the main idea for this paper. In the equation the relationship is change to be the linkage bewteen pi value in different t(period time) and f.


  When we need the satisfying water quality requirements. We can  use the high-bound level. But we should know the benefit will be decreased. On the contrary,the highest benefit for the government and society will bring the risk of violatin environmental problem when it gives out the lots of income.
  The ICCP-WQM still have limination. First, it runs on the steady-state. But we know the river never in the steady-state forevery. Then any fluctation in the river will affect the result. Second, the ICCP could be used in the single objective but not the multiple objective
  I think this paper could help our laboratory in the water modeling area. It show us the real life case with the new method.

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