印度勒克瑙戈马蒂河亚热带混合城市至城市洪泛平原的古生物和沉积物质地反应

IF 3.5 2区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Pooja Tiwari , Purnima Srivastava , Biswajeet Thakur
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引用次数: 0

摘要

水动力与植被的相互作用是活跃蜿蜒河流中河川生物形态动力学的一部分。本研究利用河谷从城郊到城市河段的古动物群落和粒度,对印度北方邦勒克瑙地区戈马蒂河 38 公里河段的有机物行为空间模式进行了研究。这样做的目的是为了了解有机物在沉积物中迁移和沉积后如何对改变、保存和降解做出反应。我们对戈马蒂河洪泛区的 13 个表层沉积物样本进行了古动物群落和粒度分析,以确定其在该河段的命运,因为该河段是过去人类定居的主要区域。研究人员考虑了古动物群落(即藻类、古生物和无定形有机物)的比例变化以及颗粒大小,以直观地了解沉积过程。CONISS 聚类分析揭示了四个区域,反映了城市水系中古生物的高度退化和改变,而在城市下 游,与自然环境的干扰较少,说明古生物的退化程度较低。利用主成分分析法(PCA)得出了粒度与古动物群落之间的关系,以强调戈马提河蜿蜒河道系统与古动物群落之间的相关性。在冲积平原沉积物中,古动物群落的行为可以区分河道沉积物分布的区域性。目前的研究比较了当今社区的城市和城郊居住区,有助于了解早期人类居住区的发展、分散和衰落。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Palynofacies and sediment texture response from sub-tropical mixed sub-urban to urban floodplains of the Gomati River, Lucknow, India

Hydromorphodynamic interactions with vegetation are a part of fluvial biomorphodynamics in actively meandering rivers. Using palynofacies and grain size from sub-urban to urban reaches across the river valley, the spatial patterns of organic matter behavior are examined in a 38 km reach of the Gomati River in Lucknow District, Uttar Pradesh, India. This is done to understand how they respond to the alteration, preservation, and degradation after getting transported and deposited in sediment. Thirteen surface sediment samples of the Gomati River floodplain were analyzed for palynofacies and grain size to ascertain its fate in this reach, which comprises the big picture for past human settlement. The shifts in the proportions of palynofacies associations, i.e., phytoclasts, palynomorphs, and amorphous organic matter (AOM) along with grain size, are considered to visualize the depositional process. The CONISS cluster analysis revealed four zones reflecting high degradation and alteration of palynofacies in the urban regime compared to the sub-urban reaches where the low interference with natural settings illustrates the low deterioration of palynofacies. The relation between grain size and palynofacies was obtained using Principal Component Analysis (PCA) to emphasize the correlation with palynofacies in the meandering fluvial system of the Gomati River. In the floodplain deposits, the behavior of palynofacies, allows for the distinction of the regional aspects of fluvial sediment disposition. The current study compares urban and sub-urban settlement premises of today's communities and contributes to the understanding of the growth, dispersal, and decline of earlier human settlements.

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来源期刊
International Journal of Sediment Research
International Journal of Sediment Research 环境科学-环境科学
CiteScore
6.90
自引率
5.60%
发文量
88
审稿时长
74 days
期刊介绍: International Journal of Sediment Research, the Official Journal of The International Research and Training Center on Erosion and Sedimentation and The World Association for Sedimentation and Erosion Research, publishes scientific and technical papers on all aspects of erosion and sedimentation interpreted in its widest sense. The subject matter is to include not only the mechanics of sediment transport and fluvial processes, but also what is related to geography, geomorphology, soil erosion, watershed management, sedimentology, environmental and ecological impacts of sedimentation, social and economical effects of sedimentation and its assessment, etc. Special attention is paid to engineering problems related to sedimentation and erosion.
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