摘要
以某地区河道为研究对象,在该河道设置3个检测点,取河道底部0.9m处的河道淤泥进行检测,测定其重金属含量情况;根据河道的高程和地面标高,确定河道底部淤泥的疏浚深度。结果表明,取样深度为90cm时,大部分重金属含量均小于规范二级标准值,且检测点1和检测点3的浓度下降趋势较大,清理河道底部的淤泥对于这两处的重金属污染具有显著的改善效果,可将清理深度定为60~70 cm,以达到减少重金属污染的目的。当取样深度为90cm时,检测点2的重金属含量均大于规范二级标准值,为达到减少重金属污染的目的,需继续加大清理深度,减少重金属污染。在改善河道污染状况和保障当地地质情况不受影响的前提下,对河道底部淤泥的疏浚深度宜保持在60~100 cm。
In this study,3 detection points were set up in the river channel of a certain area,and the silt at the bottom of the river channel at 0.9m was taken to detect the heavy metal content,based on the river elevation and ground level,the dredging depth of the silt at the bottom of the river is determined.The results show that when the sampling depth is 90cm,the concentration of most heavy metals is less than the second standard value,and the concentration of detection point 1 and 3 tends to decrease,the removal of the silt at the bottom of the river course can significantly improve the heavy metal pollution in these two places,and the depth of the removal can be set at 60~70cm to reduce the heavy metal pollution.When the sampling depth is 90cm,the heavy metal content in the Test Point 2 is higher than the second standard value.In order to reduce the heavy metal pollution,the cleaning depth should be increased to reduce the heavy metal pollution.The dredging depth should be kept at 60~100cm on the premise of improving the river pollution and ensuring the local geological conditions not to be affected.
作者
张璐
ZHANG Lu(Hubei Luyuan Water Resources and Hydropower Construction Engineering Co.Ltd.,Wuhan 430000,China)
出处
《水利科技与经济》
2023年第3期7-11,共5页
Water Conservancy Science and Technology and Economy
关键词
黑臭水体
疏浚深度
环境影响
black and odorous water body
dredging depth
environmental impact
