Long term high frequency sediment observatory in an alpine catchment: The Arc‐Isère rivers, France,Hydrological Processes

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Long term high frequency sediment observatory in an alpine catchment: The Arc‐Isère rivers, France
Hydrological Processes ( IF 2.8 ) Pub Date : 2021-01-11 , DOI: 10.1002/hyp.14044
F. Thollet ₁ , C. Rousseau ₂ , B. Camenen ₁ , S. Boubkraoui ₂ , F. Branger ₁ , F. Lauters ₃ , J. Némery ₂

Affiliation

We present a dataset on to the Arc‐Isère long‐term environmental research observatory, which is part of the Rhône Basin Long Term Environmental Research Observatory. This alpine catchment located in the French Alps is characterized by high Suspended Particulate Matter (SPM) in anthropogenized valleys. Suspended Sediment Concentrations (SSC) naturally observed in the river are very high, ranging from a few tens of milligrams per litre at low flow to tens of grams per litre during major natural hydrological events (floods, debris flows) or river dam hydraulic flushes. One research objective related to this site is to better understanding the SSC dynamics along the river using a system of nested catchments (Arvan, Arc, and Isère) in order to assess both temporal and spatial dynamics. The data allow the quantification of fine sediment yields and also the evaluation of possible morphological changes due to fine sediment deposition or resuspension. Additionally, the observatory database support studies on contaminants (either dissolved or particulate contaminants). Our monitoring includes six stations with high frequency (2–30 min) streamflow, SSC measurement using turbidity sensors, and associated automatic sampling. Discharge is measured via water level measurements and a rating curve. The oldest station (Grenoble‐campus) started recording discharge and concentration data from April 2006 while others stations were built between 2009 and 2011. Data are available in an online data website called ‘Base de Données des Observatoires en Hydrologie’ (Hydrological observatory database, https://bdoh.irstea.fr/ARC-ISERE/) with a DOI reference for the dataset. The hydrological and sediment transport time series are stored, managed and made available to a wide community with unfettered access in order to be used at their full extent. This database is used as a data exchange tool for both scientists and operational end‐users and there is an associated online tool to compute integrated fluxes.

中文翻译：

高山流域的长期高频沉积物观测台：法国阿克塞勒河

我们向Arc-Isère长期环境研究观测站展示了一个数据集，该观测站是罗纳盆地长期环境研究观测站的一部分。位于法国阿尔卑斯山的这个高山流域的特点是人为化山谷中的悬浮颗粒物（SPM）高。在河流中自然观察到的悬浮泥沙浓度非常高，范围从低流量时的每升几十毫克到主要自然水文事件（洪水，泥石流）或河坝水力冲刷时的数十克每升。与该站点有关的一个研究目标是使用嵌套的集水系统（Arvan，Arc和Isère）更好地了解沿河的SSC动态，以便评估时空动态。数据可以对精细沉积物的产量进行量化，还可以评估由于精细沉积物的沉积或再悬浮而可能引起的形态变化。此外，天文台数据库支持对污染物（溶解或颗粒污染物）的研究。我们的监测包括六个流量较高的站（2–30分钟），使用浊度传感器进行的SSC测量以及相关的自动采样。通过水位测量和额定曲线测量流量。最古老的气象站（格勒诺布尔-坎普斯）从2006年4月开始记录流量和浓度数据，而其他气象站则是在2009年至2011年之间建立的。该数据可在称为“水文观测台数据库”的在线数据网站上找到， https：//bdoh.irstea。fr / ARC-ISERE /）和数据集的DOI参考。水文和泥沙输送时间序列可以不受限制地访问，存储和管理，并提供给广大社区，以便充分利用。该数据库用作科学家和运营最终用户的数据交换工具，并且有一个关联的在线工具可以计算出集成通量。

更新日期：2021-02-11

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