滇池主要入湖河道口旱季/雨季水体氮磷污染物变化研究

Study on Nitrogen and Phosphorus Pollutants Changes of Main Into-Lake Rivers for Kunming Danchi Lake during Dry and Rainy Seasons

分别于旱季和雨季对盘龙江、大清河、宝象河、捞渔河、柴河、东大河等16条主要的滇池入湖河道的入湖口氮、磷污染物含量进行监测,分析不同入湖河道口氮、磷污染物的时间和空间变化。结果表明:无论是旱季还是雨季,流经昆明主城区的河道其入湖口氮、磷污染物的浓度远高于流经呈贡县的河道和流经晋宁县的河道,流经呈贡县的河道其入湖口氮、磷污染物的浓度比流经晋宁县的河道高。在雨季流经昆明主城区的入湖河道其入湖口氮、磷污染物的浓度远低于旱季;流经呈贡县的河道其入湖口氮、磷污染物的浓度雨季比旱季有明显的增加,流经晋宁县的河道其入湖口氮、磷污染物的浓度雨季比旱季有明显的降低。

By monitoring the concentrations of nitrogen and phosphorus pollutants at entrances of 16 principle river courses to Dianchi Lake during rainy and dry seasons, namely Panglong river, Daqing river, Baoxiang river, Laoyu river, Chai river, and Dongda river etc, the temporal and spatial variation of the concentrations of nitrogen and phosphorus pollutants were analyzed. The results indicated that in both dry season and rainy season, the concentrations of nitrogen and phosphorus pollutants at entrances of the rivers flowing through Kunming city were far higher than those of the rivers flowing through Chenggong county or Jinning county, the concentrations of nitrogen and phosphorus pollutants at entrances of the rivers flowing through Chenggong were higher than those of the rivers through Jinning. In rainy season, the concentrations of nitrogen and phosphorus pollutants at entrances of the rivers running through Kun-ming city were far lower than that in the dry season, the concentrations of nitrogen and phosphorus pollutants at the entrance of the rivers running through Chenggong county were higher in rainy season than in dry season. At the entrance of the rivers through Jingning county had a noticeable drop in concentrations of nitrogen and phosphorus pollutants in the rainy season compared with dry season.