CAJ | 학술논문

[目的]研究高等水生植物对太湖沉积物再悬浮的影响。[方法]采用新型再悬浮模拟器，在底泥中种植沉水植物伊乐藻（Elodeanuttalli）和挺水植物芦苇（Phragmitesaustralis），并设置不同的种植密度，在0．2～0．5N／m：的切应力下和1--30rain的持续搅拌条件下，对太湖原状沉积物的再悬浮特征开展模拟实验研究。[结果】种植水生植物可以有效减少水体中悬浮物浓度，各试验组及对照组最终上覆水悬浮物（SuspendedPartie—ulateMatter，SPM）浓度大小均为：无植物〉覆盖度30％的伊乐藻〉覆盖度60％的伊乐藻〉密度50株/m2的芦苇〉覆盖度90％的伊乐藻〉密度80株／m2的芦苇〉密度150株/m2的芦苇；各组的SPM浓度均随切应力的增大显著增大；在不同切应力下，各组内SPM浓度均随搅拌时间变化呈现先增加后逐渐趋于稳定的规律，无水生植物的桶内SPM浓度初期变化更为剧烈，而种植水生植物的桶内SPM浓度初期变化较为缓和，且种植密度越大该变化越小；种植挺水植物芦苇对SPM浓度的削减程度要明显大于沉水植物伊乐藻，在不同切应力下，增大芦苇种植密度使SPM浓度降低的幅度要比增大伊乐藻覆盖度更大。【结论]通过全面地开展水体沉积物再悬浮特征研究，可以更好地为控制水体环境提供有力的科学依据。
[목적]연구고등수생식물대태호침적물재현부적영향。[방법]채용신형재현부모의기，재저니중충식침수식물이악조（Elodeanuttalli）화정수식물호위（Phragmitesaustralis），병설치불동적충식밀도，재0．2～0．5N／m：적절응력하화1--30rain적지속교반조건하，대태호원상침적물적재현부특정개전모의실험연구。[결과】충식수생식물가이유효감소수체중현부물농도，각시험조급대조조최종상복수현부물（SuspendedPartie—ulateMatter，SPM）농도대소균위：무식물〉복개도30％적이악조〉복개도60％적이악조〉밀도50주/m2적호위〉복개도90％적이악조〉밀도80주／m2적호위〉밀도150주/m2적호위；각조적SPM농도균수절응력적증대현저증대；재불동절응력하，각조내SPM농도균수교반시간변화정현선증가후축점추우은정적규률，무수생식물적통내SPM농도초기변화경위극렬，이충식수생식물적통내SPM농도초기변화교위완화，차충식밀도월대해변화월소；충식정수식물호위대SPM농도적삭감정도요명현대우침수식물이악조，재불동절응력하，증대호위충식밀도사SPM농도강저적폭도요비증대이악조복개도경대。【결론]통과전면지개전수체침적물재현부특정연구，가이경호지위공제수체배경제공유력적과학의거。
[Objective] The aim was to study effects of aquatic plants on resuspen- sion of sediment in Lake Taihu. [Method] New resuspension simulator was used in the research. Elodea nuttalli, submerged plant, and Phragmites australis, emergent aquatic plant, were grown in substrate sludge with varied planting density set. Study of simulation experiment on the feature of sediment resuspension was carried on under shearing stress of 0.2-0.5 N/m2 and agitation of 1-30 min. [Result] Aquatic plant growing would effectively reduce seston concentration in water. Concentrations of final Suspended Particulate Matter （SPM） in experimental groups and control groups were as follows： water without plant〉coverage of 30% of Elodea nuttalli〉cov- erage of 60% of Elodea nuttalli〉Phragmites australis with concentration of 50 stock/m2〉 coverage of 90% of Elodea nuttalli〉Phragmites australis with concentration of 80 stock/m2〉Phragmites australis with concentration of 150 stock/m2; SPM concentration showed a tendency from increasing to stable with change of stirring time under dif- ferent shearing stresses： SPM concentration was of severe change at early stage in barrel without aquatic plant while change of SPM concentration in barrel with aquatic plant was quite mild and grew smaller with concentration increasing; SPM concentration was reduced much more if Phragmites australis planted compared with that of Elodea nuttalli; under different shearing stresses, reduction of SPM concen- tration by increase of Phragmites australis area was much more than by increase of Elodea nuttalli area. [Conclusion] It would provide powerful scientific reference for control on aquatic environment through comprehensive research on the feature of sediment resuspension.