Kaggwa R C, Mulalelo C I, Denny P, Okurut T O
National Water and Sewerage Corporation, P.O. Box 7053, Kampala, Uganda.
Water Res. 2001 Mar;35(3):795-807. doi: 10.1016/s0043-1354(00)00301-8.
Alum sludge discharge effects on a natural wetland on the shores of Lake Victoria at Gaba in Uganda has been investigated. The water quality in the swamp, the sediment chemistry and plant growth and productivity were monitored. The subsequent application of alum sludge discharges shows no immediate, noticeable, adverse overall effects on the water quality and sediment chemistry. A distinct effect on plant productivity was noted in Cyperus papyrus L. the dominant macrophyte in the Gaba swamp resulting in a low productivity rate of 5.1 g/m2 d and the apparent phasing out of this macrophyte in the swamp. Phragmites mauritianus (Kunth) exhibited better tolerance to alum sludge. Clear indications are cited of the ecosystem degrading and cumulative effects being marked over a longer time frame.
已对乌干达加巴维多利亚湖岸边一处天然湿地的明矾污泥排放影响展开调查。对沼泽地水质、沉积物化学性质以及植物生长和生产力进行了监测。随后的明矾污泥排放应用显示，对水质和沉积物化学性质并无立竿见影的明显不利总体影响。在加巴沼泽地的优势大型植物纸莎草中，观察到对植物生产力有显著影响，导致其生产力低至5.1克/平方米·天，且该大型植物在沼泽地明显逐渐消失。芦苇对明矾污泥表现出更强的耐受性。有明确迹象表明，在更长时间范围内，生态系统正在退化，累积影响显著。
