CAJ | 학술논문

2011─2013年，在滇池外海水域实施了规模化控养水葫芦（Eichhornia crassipes）修复富营养化湖泊水体的试验性工程，以及外海湖体与控养区内、外水质的变化分析，探讨规模化控养水葫芦对外海水质的改善效果。结果表明：水葫芦在滇池外海控养水域生长迅速，安全可控，并未出现逃逸泛滥现象。2012和2013年水葫芦最大覆盖面积分别为556.39和257.87 hm2，通过对其采收共计从外海水体带走氮691.89 t，磷57.40 t；工程实施期间，外海全湖水质得到一定的改善，水体TP平均浓度始终维持在较低水平，水体TN平均浓度显著下降，尤其2012年，外海湖体TN平均质量浓度由2011年的2.80 mg·L-1降至1.96 mg·L-1，同比下降了30.00%；水葫芦控养区内水体TN和TP平均浓度较控养区外分别下降了28.52%和13.04%。综上分析，规模化控养水葫芦可削减水体大量的氮、磷，尽管水葫芦覆盖面积不足外海水域面积的2.00%，但仍对外海全湖水质改善具有一定效果。该研究为规模化控养水葫芦应用于大型富营养化湖泊的治理提供了工程实践与理论依据。
2011─2013년，재전지외해수역실시료규모화공양수호호（Eichhornia crassipes）수복부영양화호박수체적시험성공정，이급외해호체여공양구내、외수질적변화분석，탐토규모화공양수호호대외해수질적개선효과。결과표명：수호호재전지외해공양수역생장신속，안전가공，병미출현도일범람현상。2012화2013년수호호최대복개면적분별위556.39화257.87 hm2，통과대기채수공계종외해수체대주담691.89 t，린57.40 t；공정실시기간，외해전호수질득도일정적개선，수체TP평균농도시종유지재교저수평，수체TN평균농도현저하강，우기2012년，외해호체TN평균질량농도유2011년적2.80 mg·L-1강지1.96 mg·L-1，동비하강료30.00%；수호호공양구내수체TN화TP평균농도교공양구외분별하강료28.52%화13.04%。종상분석，규모화공양수호호가삭감수체대량적담、린，진관수호호복개면적불족외해수역면적적2.00%，단잉대외해전호수질개선구유일정효과。해연구위규모화공양수호호응용우대형부영양화호박적치리제공료공정실천여이론의거。
A pilot project on eutrophic lake restoration with large scale confined growth ofEichhornia crassipes was implemented in Waihai of Dianchi Lake from 2011 to 2013. The effects of water quality improvement (nitrogen and phosphorus removal, changes of water quality inside and outside of planting zone) in waihai was investigated. Results showed thatE. crassipes grew rapidly, safety and controllability without escaping. The largest area covered with E. crassipes were 556.39 hm2 and 257.87 hm2 in 2012 and 2013, respectively. The amount of nitrogen and phosphorus removal by plants were 691.89 tons and 57.40 tons in 2012 and 2013, respec-tively. During the ecological engineering, water quality of Waihai was improved significantly by large-scale confined growthE. crassipes. TP concentrations kept in low level, while those of TN was reduced significantly especially in 2012. Concentration of TN reduced by 30.00% (from 2.80 mg·L-1 to 1.96 mg·L-1). While TN and TP concentrations decreased by 28.52% and 13.04% in planting zone, respectively. The results indicated that efficient nitrogen and phosphorus removal was shown with large-scale confined growth ofE. crassipes. Although area withE. crassipes was less than 2.00% of the whole area in Waihai, certain effect on the water quality improvement was shown. These findings could provide references on theory and practice forlarge eutrophic lakes restoration withE. crassipes.