昆明盘龙江水质变化与河流治理成效的研究

通过对昆明盘龙江地表水在2008年12月和2009年12月进行取样和分析，结果表明：盘龙江水质经整治后有明显改善，2008年只有河流上段水质化学需氧量（CODCr）达到地表水V类标准，中、下段水质超标严重，而2009年，自上段到下段，水质都在地表水V类以内；2008年，盘龙江水质中溶解氧（DO）只有中、上段达到地表水V类标准，而2009年全河段都有大幅度提高，下段水质DO也接近V类水标准。两个年度CODCr和DO存在显著性差异。2009年与2008年相比，水中氨态氮、硝酸盐氮、总磷浓度都显著性降低。此外，水中pH值、电导率、氟化物、氯化物和硫酸盐年度间差异不大，都在地表水质标准允许范围内。

Study on Water Quality Change and Treatment Effectiveness of Panlong River in Kunming

The water quality of Panlong fiver is sampled and analyzed in December of 2008 and December of 2009. the results indicate that there is great improvement for the water quality after comprehensive treatment. In 2008, only COD in the up-stream can reach the fifth class standard, however, it is worse in the midstream and downriver. The COD index of the whole stream can reach the fifth class standard in 2009. Similarly, the DO in 2008 can reach the fifth class standard in the up-stream and midstream, it is dramatically increased in the whole stream in 2009, even in the down river, the DO index can meet the standard. There is distinctively decrease for concentration of ammonia nitrogen and nitrate nitrogen and total phosphorus in 2009 by comparing with that of 2008. On ,the other hand, there are no clear changes for the other indexes involving in pH value and conductivity and fluoride and chloride and ascorbic acid sulfate.