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| 1 | 长江中游网湖沉积物营养元素变化特征及其影响因素显示文摘在放射性核素137Cs和210Pb精确计年的基础上,建立了长江中游网湖近代沉积物年代序列。通过对沉积物中TOC、TN、TP、孢粉、重金属元素、粒度等指标的测定,结合相关文献资料,分析了百年来网湖沉积物中营养元素的分布特征,物源变化以及主控因子。结果表明:百年来网湖沉积物中TN和TOC含量显著相关,呈不断上升趋势,存在2个明显的演化阶段,主控因子为流域人类活动强度,气候波动对其有影响,但影响不大。TP的变化与TN和TOC明显不同,波动较大,规律不明显,主要受人类活动强度以及径流侵蚀输移入湖物质变化两大因子控制。 | 史小丽 秦伯强 | 2010 | 地理科学2010，30，5： | 12 |
| 2 | Laboratory scale study of an industrial phosphate and thermal treatment for polluted dredged sediments显示文摘挖出的沉积化学上在工业规模上与磷的酸正在被对待。处理的有效性被在一个管状的反应堆执行化学反应评估,由在周围的温度并且最后的对流弄干和对待的沉积的成熟列在后面由锻烧的有机物的热破坏(500 ? | Souhila KRIBI Jocelyn RAMAROSON Ange NZIHOU Patrick SHARROCK Guy DEPELSENAIRE | 2012 | International Journal of Sediment Research2012，27，4： | 3 |
| 3 | 湛江某对虾基地沉积物重金属含量特征及评价显示文摘探讨了湛江某对虾养殖基地虾场沉积物中重金属Cu、Zn、Pb、Cd、Cr的含量特征,并采用单因子、内梅罗综合污染指数以及H覽kanson潜在生态风险指数等方法评估了几种重金属的环境风险,分析了其主要来源。结果表明,虾场沉积物Cu含量在11.5~38.5mg/kg之间;Zn含量在87.6~176.4 mg/kg之间;Pb含量在45.7~85.4 mg/kg之间;Cd含量在0.108~0.185 mg/kg之间;Cr含量在37.5~93.7mg/kg之间。通过计算重金属元素的单项污染指数和综合污染指数,表明虾池沉积物属于清洁土壤,符合绿色食品产地规定的土壤质量环境要求。采用H覽kanson指数法进行了潜在生态危害评价,发现各样点沉积物呈现出轻微至中等的生态风险,参与评价的5种重金属生态风险由强到弱的顺序依次为Cd>Pb>Cu>Zn>Cr。虾池沉积物中重金属Cu、Zn含量间存在显著正相关,这可能与该地区虾池投放的饲料和消毒剂含Zn、Cu有关。 | 黄雪夏 姚泊 邓红梅 崔明超 | 2011 | 环境科学与技术2011，34，4： | 2 |
| 4 | Variations in total organic carbon and grain size distribution in ephemeral river sediments in western India显示文摘Total organic carbon(TOC) and grain size distribution(sand,silt,and clay) in the ephemeral Mahi River(western India) sediments were measured to look at their effectiveness in understanding the late Quaternary monsoon conditions.Four sites spread across the alluvial zone and three sites from the estuarine zone were sampled.TOC concentration in the sediments of the alluvial and estuarine zone sites ranged between 0.04 and 0.39%and 0.04 and 0.23%,respectively.It was observed that grain size differed significantly at the alluvial zone sites,whereas an uniform trend was found in the estuarine zone sites.The study indicated that low concentration of TOC and coarse size fractions(sand) in sediments were well correlated with available records of arid/weaker palaeomonsoon periods,whereas higher concentration of TOC and fine grain size fractions(silt + clay) in sediments were well correlated with available records of enhanced palaeomonsoon periods of the ephemeral Mahi River.Uniform concentrations of TOC and fine grain size particles in sediments at the estuarine zone sites are attributed to the backwater in the system,deeper sedimentation,and/or greater decomposition processes.It is concluded that,TOC and grain size distributions in the ephemeraL river sediments are simple and effective parameters to develop an understanding about late Quaternary monsoon conditions in ephemeral rivers. | J.DINAKARAN N.S.R.KRISHNAYYA | 2011 | International Journal of Sediment Research2011，26，2： | 2 |
| 5 | Variation of turbidity during subsurface abstraction of river water: A case study显示文摘Rivers are known to carry sediment loads. Many rivers in Asia including Kosi, Brahmaputra, Bagmati rivers in India and Yellow and Yarlung Tsangpo rivers in China are well known for their carriage of excessive sediment loads. In India, many water abstraction units are located along river banks. Their success depends on how the sediment load is trapped as the sediment laden water flows towards the pumping wells located few hundred meters away from river bank. In this work, based on the analysis of a data of one year on suspended load variations in a canal, located at Haridwar, India, trap efficiency variations are studied during the passage of source water to the abstraction well. Considering the subsurface basin, located within the source water and the abstraction well, as a hypothetical settling basin, variation of trap efficiency is related with the influent concentration. It is observed that the trap efficiency depends on the influent concentration. Appropriate functional forms for the variation of trap efficiency with the influent concentrations are also identified. | A.K.THAKUR C.S.P.OJHA | 2010 | International Journal of Sediment Research2010，25，4： | 0 |
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