Factors affecting River Turbidity in a Degrading Permafrost Environment: The Tasiapik River, Umiujaq (Nunavik)”

IF 2.7 3区 地球科学 Q2 ECOLOGY Arctic Science Pub Date : 2022-04-13 DOI:10.1139/as-2021-0036
F. Manseau, N. Bhiry, J. Molson, D. Cloutier
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引用次数: 2

Abstract

This study focuses on spatiotemporal changes in water turbidity in relation to permafrost to document the impact of meteorological conditions and water flow on hydro-sedimentary processes in northern regions. Starting in June of 2019, water turbidity data were collected at six sites along the Tasiapik River (Nunavik). A statistical analysis was completed based on records of water turbidity, precipitation, water flow and air temperature. Our results show a significant correlation between air temperatures and turbidity, with a correlation of up to r = 0.59. These correlations depend on the location of the site along the river and the time of the study period (June-October 2019). The flow rate was the primary factor that caused variations in the turbidity of the Tasiapik River. Our results showed that following an increase in flow rate, there was an almost simultaneous increase in turbidity due to erosion of the banks. The duration and intensity of precipitation events are also important factors affecting the process of sediment transport. Even though meteorological conditions play an important role in turbidity variation, other characteristics of the site such as the topography and the existence of thermokarst lakes are additional factors that influence the dynamics of sediment transport in the Tasiapik River.
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在退化的永久冻土环境中影响河流浊度的因素:乌米乌贾克(努纳维克)Tasiapik河
本研究聚焦于水浊度的时空变化与多年冻土的关系,以记录气象条件和水流对北方地区水沉积过程的影响。从2019年6月开始,在Tasiapik河(Nunavik)沿岸的六个地点收集了水浊度数据。根据水浊度、降水、水流和气温的记录,完成了统计分析。我们的结果表明,空气温度和浊度之间存在显著的相关性,相关系数高达r = 0.59。这些相关性取决于沿河地点的位置和研究期间的时间(2019年6月至10月)。流量是引起塔什皮克河浑浊度变化的主要因素。我们的结果表明,随着流速的增加,由于河岸的侵蚀,浑浊度几乎同时增加。降水事件的持续时间和强度也是影响输沙过程的重要因素。尽管气象条件在浊度变化中起着重要作用,但场地的其他特征,如地形和热岩溶湖的存在,是影响Tasiapik河沉积物运移动力学的附加因素。
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来源期刊
Arctic Science
Arctic Science Agricultural and Biological Sciences-General Agricultural and Biological Sciences
CiteScore
5.00
自引率
12.10%
发文量
81
期刊介绍: Arctic Science is an interdisciplinary journal that publishes original peer-reviewed research from all areas of natural science and applied science & engineering related to northern Polar Regions. The focus on basic and applied science includes the traditional knowledge and observations of the indigenous peoples of the region as well as cutting-edge developments in biological, chemical, physical and engineering science in all northern environments. Reports on interdisciplinary research are encouraged. Special issues and sections dealing with important issues in northern polar science are also considered.
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