原位生态反应池对安庆西小湖水质的修复效果

Restoration Effect of In-situ Ecological Reaction Pool on Water Quality of West Lake in Anqing

[目的]探索原位生态修复技术在城市景观湖治理中的应用效果。[方法]以安庆西小湖为原位生态修复试验对象,共设置6个断面(A、B、C、D、E、F),于实施前(8月19日)和实施后(2015年9月24日和10月19日)监测氨氮、总磷、总氮浓度、高锰酸盐指数和透明度。[结果]A点位氨氮浓度从处理前的5.600 mg/L下降到3.870 mg/L,下降率为30.89%。D点位总磷从处理前的0.413 mg/L下降到0.195 mg/L,下降率为52.78%。E点位高锰酸盐指数从处理前的10.600 mg/L下降到7.470 mg/L,下降率为29.53%。E点位总氮浓度从处理前的7.800 mg/L降到6.660 mg/L,下降率为14.62%。各监测断面的透明度在处理后均有明显改善,从处理前为20 cm提高到28 cm。[结论]原位生态反应池对安庆西小湖的修复效果较好,各监测断面氨氮、总磷、高锰酸盐指数、总氮指标、透明度总体均有明显改善。

Objective] The aim was to explore the application effect of in-situ ecological restoration technology in urban landscape lake gov-ernance.[Method] Taking West Lake in Anqing as test object, setting up 6 sections （A,B,C,D,E,F）, ammonia nitrogen, total phosphor-us, total nitrogen, permanganate index and transparency before（Aug.19, 2015） and after（Sep.24, 2015 and Oct.19, 2015） implementation was monitored.[Result] Ammonia nitrogen concentration decreased from 5.600 mg /L to 3.870 mg /L, with the decreasing rate of 30.89% in A site.Total phosphorus decreased from 0.413 mg /L to 0.195 mg /L, with the decreasing rate of 52.78% in D site.Permanganate index de-creased from 10.600 mg /L to 7.470 mg /L, with the decreasing rate of 29.53%, total nitrogen concentration decreased from 7.800 mg /L to 6.660 mg /L, with the decreasing rate of 14.62% in E site.The transparency of each monitoring section was significantly improved after treat-ment, increasing from 20 cm to 28 cm.[Conclusion] In-situ ecological reaction pool has good effect on restoration of West Lake in Anqing, ammonia nitrogen, total phosphorus, total nitrogen, permanganate index and transparency in each section is significantly improved in general.