Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR030360 |
Sediment reworking in streambeds with fine sediment deposits and its influence on hyporheic flow regime | |
S. Shrivastava; M. J. Stewardson; M. Arora | |
2021-12-08 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | The mobilization and mixing of sediments by the activities of in-stream fauna, referred to as sediment reworking, constantly modifies the hydro-physical properties of streambeds. This sediment-organism interaction has been increasingly recognized to influence the hyporheic exchange flows in stream ecosystems, particularly in low flow environments (e.g. during base flow). In this work, we advance the knowledge of sediment reworking process by studying its impact on hyporheic exchange flows in streambeds with fine sediment deposits. Laboratory experiments are conducted in re-circulating flumes following a control (only fine sediments) and treatment- (fine sediments + organisms) based design. The experiments involve studying the interaction of model organisms (Lumbriculus variegatus) with fine sediment (clay) deposits, and its subsequent influence on hyporheic flow regime in homogenous streambeds with fine sand, coarse sand, and gravel as substrate sediments. We observe that model organisms burrowed extensively into the fine sediment layer, mixed the clay particles with underlying grains, and eventually exposed the substrate sediments in the treatment flumes. Consequently, the treatment flumes exhibited greater solute penetration depth, shorter residence times, and higher hyporheic exchange flux compared to their respective control flumes. The results also suggest that the modification of hyporheic exchange flows depends on the overall reworking of the beds i.e., the interaction of organisms with both substrate material and deposited fine sediments. It is critical to comprehend the influence of streambed inhabitants on mass and energy exchange across the sediment-water interface as it has implications on the overall quality of both stream and groundwater. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/343014 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | S. Shrivastava,M. J. Stewardson,M. Arora. Sediment reworking in streambeds with fine sediment deposits and its influence on hyporheic flow regime[J]. Water Resources Research,2021. |
APA | S. Shrivastava,M. J. Stewardson,&M. Arora.(2021).Sediment reworking in streambeds with fine sediment deposits and its influence on hyporheic flow regime.Water Resources Research. |
MLA | S. Shrivastava,et al."Sediment reworking in streambeds with fine sediment deposits and its influence on hyporheic flow regime".Water Resources Research (2021). |
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