Application of Integrated Black-odorous Index Method on Black-odorous Prediction for Urban River in Nanning

Abstract

In this paper, the integrated black-odorous index method was used to predict the degree of black-odorous for the urban rivers (such as Shibu, Keli and Naping River) which locate in the north shore of the Yongjiang River in Nanning. The results showed that the accuracy of the integrated black-odorous index method was 98.10% compared with the prediction method from guideline. The integrated black-odorous index method was a good characterization of the black-odorous index for urban rivers in Nanning. In order to eliminate the influence of extreme value, a correction factor (named b) is added to limit the extreme value. The accuracy of the prediction was increased to 99.05% after the correction proved that this method is effective.