Development And Application Of The Emergency Response Decision Support System For Surface Water Pollution Accidents

The safety of drinking water is not only the basic guarantee of people’s life and health, but an inevitable requirement of social development. Surface water is an important source of water supply, its pollution events occur frequently, and bring tremendous threat to the safety of drinking water. How to carry out emergency disposal timely and effectively has become an urgent problem. This paper developed a surface water pollution emergency response decision support system to provide technical guidance for the emergency treatment of surface water.This paper sorts out 150 emergency surface water pollution incident, 400 kinds of pollutants, 90 kinds of emergency technology, 100 emergency experts by literature research, environmental protection department data, network information and other channels, on the basis of which established case, pollutants, techniques, detection, expert and water quality standard a total of six indicators of the system, then developed six databases with the help of Oracle 10 g. Using R-AHP to construct a emergency technology screening and assessment system with technical, environmental, social, and economic 4 kind of indicators as the criterion layer, and 18 indexes as the solution layer. On the basis of the databases and the evaluation system of disposal technology, using Visual Studio 2010 developed a surface water pollution emergency response decision support system based on B/S mode.In order to fill the blank of technology about disposing heavy metal pollution burst at low temperature, this paper also studied the effect of the adsorbent for As(III) and Cr(VI) in low temperature surface water, and the result showed that: In the condition of 6℃, and p H was 7.0, 5A molecular sieve and activated alumina had good adsorption properties for As(III) and Cr(VI) respectively, their adsorption equilibrium time were both 3h, and the adsorption both obeyed Lagergren second-order kinetics model and Freundlich adsorption isotherm model. G ot the optimum dosage of adsorbents of As(III) and Cr(VI) under different concentrations in the reservoir water and river water. The result can provide technical support to water pollution emergency disposal in low temperature conditions.Using the system established in this paper to analyse two cases of sudden pollution of surface water the result showed that, adding ferrate and adding disinfectant were the best technologies for arsenic pollution in Linyi and cyanide pollution in Shanxi, and costed 785 and 450 thousand yuan respectively.Two heavy metal pollution cases which were more likely to burst in China were assessed and analyzed by the acquired system and the adsorption technology at low temperature. Results showed that under the low temperature water condition, adding molecular sieve and adding activated alumina adsorption were the best technologies for arsenic pollution in Sulu and chromium pollution in Yunnan, and costed 9.36 and 5.19 million yuan respectively.