Coastal and estuarine sediment archives for flood-induced pollution in subtropic / tropic areas – a proof-of-concept study
亚热带/热带地区洪水引起的污染的沿海和河口沉积物档案——概念验证研究
基本信息
- 批准号:423690112
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2019
- 资助国家:德国
- 起止时间:2018-12-31 至 2023-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
A precursory proof-of-concept study of the applicants focused on riparian wetlands of two river systems, the Adyar and Cooum rivers, affecting the urban area of Chennai (Tamil Nadu, India). The corresponding results pointed to three remarkable aspects: (i) The urban riverine floodplains in Chennai do not represent significant deposition systems for the riverine sediment-bound pollution; (ii) a broad spectrum of pollutants was detectable even though on a moderate to low concentration level and (ii) in particular for the organic contaminants, several source specific and, therefore, indicative compounds have been identified. However, the question on the major accumulation deposit for the especially urban waste emissions, that can act as sedimentary archive reflecting the pollution history, still remains.Therefore, this project consecutive proposal is intended to test estuarine and backwater systems of the same river systems as suitable major sediment accumulation areas. A first aim is the identification of appropriate sediment archives reflecting the flood/monsoon-driven flushing-out of pollutants at the Indian river systems towards the coastal systems. Here, the interaction of urban riverine systems with the estuarine and backwater areas is focused on. Secondly, a first pollution history using specific marker substances and elements reflecting the various emission sources discharging along the river’s course and in particular the urban area will be built up.Three different areas at the estuary and along the connected coastline will be sampled and tested for their potential to act as sedimentary long-term deposits of riverine discharge. These includes the estuarine area directly at the river mouths (floodplains and river islands), the nearshore areas as well as the backwater systems at Pulicat lagoon and Muttukadu connected to the river systems by the Buckingham canal.Finally, the geochemical comparison of estuarine, backwater and coastal core samples will test the ability to act as sedimentary archives and will reveal evidence for redeposition and accumulation processes of Adyar and Cooum derived particulate matter. The riverine pollution history with particular focus on the urban emissions of Chennai will be exemplarily reconstructed by quantitative analyses of indicator substances and elements in selected sediment cores.
对申请者进行了一项前期概念验证研究,重点是影响金奈(印度泰米尔纳德邦)市区的阿德亚尔河和库姆河两个河流系统的河岸湿地。相应的结果指出了三个值得注意的方面:(1)金奈的城市河流泛滥平原并不代表河流泥沙污染的重要沉积系统;(2)即使在中低浓度水平上也可以检测到广泛的污染物;(2)特别是对于有机污染物,已经确定了几种来源特定的指示性化合物。然而,作为反映污染历史的沉积档案,特别是城市垃圾排放的主要堆积沉积物的问题仍然存在,因此,本项目连续提案的目的是将同一水系的河口和回水系统作为合适的主要泥沙堆积区。第一个目标是确定适当的沉积物档案,反映洪水/季风驱动的污染物在印度河流系统冲向沿海系统的情况。在这里,重点研究城市河流系统与河口和回水区的相互作用。第二,我们会利用特定的标志性物质和元素,建立第一个污染史,以反映沿河道排放的不同排放源,特别是市区,并会在河口和相连的海岸线三个不同的地区抽取样本,以测试它们作为河流排放的长期沉积沉积物的潜力。这包括河口(泛滥平原和河流岛屿)的直接河口区域、近岸地区以及通过白金汉运河与河流系统连接的Pulicat泻湖和Muttukadu的回水系统。最后,对河口、回水和沿海岩心样品的地球化学比较将测试其作为沉积档案的能力,并将揭示Adyar和Cooum来源的颗粒物质再沉积和积累过程的证据。将通过对选定沉积物岩心中的指示物质和元素进行定量分析,模范地重建河流污染历史,特别侧重于金奈的城市排放。
项目成果
期刊论文数量(0)
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Professor Dr. Frank Lehmkuhl其他文献
Professor Dr. Frank Lehmkuhl的其他文献
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{{ truncateString('Professor Dr. Frank Lehmkuhl', 18)}}的其他基金
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71288812 - 财政年份:2007
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