APPLYING POLLUTANT LOAD FACTOR METHOD FOR ESTIMATION OF POLLUTION LOAD AND EVALUATION OF POLLUTANT FACTORS IN INLE LAKE, MYANMAR

Abstract

 In recent years, it has been pointed out that the conditions of Inle lake relevant to water quality has been deteriorated. To evaluate water pollution factors from a macroscopic viewpoint, pollution loads from the watershed were estimated by adopting “pollutant load factor method.” As a result, according to estimation of total pollution loads for Inle Lake, the amount of COD came to be 29,000 kg/day, TN for 20,100 kg/day, and TP for 1,820 kg/day. The results indicate that the non-point source loads were overwhelmingly large. Comparing these results with the main lakes in Japan, Lake Biwa contains the highest level of COD, following by Lake Inle and Lake Kasumigaura. While Lake Inle has the highest concentration of TN and TP. Based on the results, implementing solutions such as controlling the domestic pollution load and proper fertilization in the floating garden should be prioritized. In this study, the measures, clarified the effectiveness of the pollutant load factor method for assessing the macro pollution factors and considering the prior measures to mitigate the water pollution for Inle Lake, are applicable to the developing countries.