| 张洪梅,刘 鑫,邓建才,沈爱春,陈 方,徐 彬,陈效民.太湖沉积物再悬浮对水体中磷形态和浓度时空差异性影响[J].农业环境科学学报,2013,32(11):2251-2257. |
| 太湖沉积物再悬浮对水体中磷形态和浓度时空差异性影响 |
| Tempo-spatial Discrepancies in Phosphorus Species and Concentrations in Lake Taihu Water Influenced by Sediment Resuspension from Wind |
| |
| DOI：10.11654/jaes.2013.11.021 |
| 中文关键词: 磷 再悬浮 水源地 太湖 沉积物 |
| 英文关键词: phosphorus resuspension water source site Lake Taihu sediment |
| 基金项目: |
|
| 摘要点击次数: 2206 |
| 全文下载次数: 2060 |
| 中文摘要: |
| 太湖作为重要的饮用水水源地，因风浪导致其沉积物中磷释放而对水质产生了显著的影响。采用Y型再悬浮发生装置模拟金墅水源地沉积物的再悬浮和沉降过程的结果表明：在5.1 m·s-1的风速作用下，上覆水体中总磷（TP）和磷酸盐（PO3-4-P）浓度存在明显的空间异质性，TP与悬浮物浓度呈正相关；水体TP距离沉积物-水界面越近其浓度越高，而PO3-4-P浓度在垂向分布上差异不显著；与3.2 m·s-1的风速作用相比，8.7 m·s-1的风速能引起更高的TP释放量。这为科学制订抑制沉积物磷释放措施提供了理论依据。 |
| 英文摘要: |
| Lake Taihu is an important source of local drinking water. Release of phosphorus from the sediments has a significant impact on water quality. A Y-shape apparatus was adopted to examine the effects of resuspension-sedimentation process on phosphorus release from the sediments in Jinshu water source in Lake Taihu. Under the wind speed of 5.1 m·s-1, obvious spatial heterogeneity of total phosphorus（ＴＰ） and orthophosphate（PO3-4-P） was observed in the overlying water, and TP concentration was positively correlated with suspended solids concentration（ＳＳ）. The vertical distribution of TP in water showed higher concentrations at closer to water-sediment interface, whereas no obvious vertical difference was observed in PO3-4-P. More TP was released under wind speed of 8.7 m·s-1. These results suggested that reducing wind speed and dissipating wave might improve water quality in Lake Taihu. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
