摘要
太湖底泥生态疏浚是湖体生态修复工程之一.工程注重生物多样性保护,并为后续生物技术介入提供基质条件.综合分析底泥污染物垂直分布、沉积相特征、主要污染物分布受人为干扰影响程度、沉水植物生物特性、淤泥土壤水动力学、沉积地球化学特征和疏浚后基面高程控制等参数,太湖底泥疏浚深度控制40～50cm为宜.施工总体设计必须注重建立物种保护区和排泥场淤泥的安全处置及尾水达标排放.依据底泥的不同密度选择不同的疏浚机械,疏浚挖掘头部设备的密封和抽吸是关键.竣工时应做好基底修复.
The eco-dredging of sediment in Taihu Lake is one of the lake eco-restoration engineering. The engineering is emphasiszing protect the biodiversity,and providing matrix condition for following eco-technology. After synthetical analyse of the vertical distribution of sediment contamination, the character of sedimentary facies, the influence degree of mainly contamination by human beings, the biology characteristic of submerged plant, the hydrodynamic characteristic of sediment ary soil, the geochemistry characteristic of deposit, and the parameter of elevation control after dredging, the suitable depth of dredging is between (40 cm) and 50 cm. The construction design must pay attention to establish the species protection area, disposal the sediment safely in the blow-off field,and drain the tailwater after it reach the standard.The dredging machine should be chosen according the difference density of the sludge deposit. Meanwhile,the airproof and suction of pump head is the key of the machine.The basement restore should be done before the construction finished.
出处
《水利水电技术》
CSCD
北大核心
2004年第11期11-13,共3页
Water Resources and Hydropower Engineering
关键词
太湖
底泥
生态疏浚
技术
Taihu Lake
sedimenet
eco-dredging
technology
