A framework for characterizing fluvial sediment fluxes from source to sink in cold environments
A framework for characterizing fluvial sediment fluxes from source to sink in cold environments
复制标题
描述寒冷环境中从源头到汇的河流沉积物通量的框架
DOI：
10.1111/j.1468-0459.2010.00387.x
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
A. Beylich
中科院分区：
文献类型：
--
作者：
J. Orwin;S. Lamoureux;J. Warburton;A. Beylich
抽象的。河流作用支配着来自大多数寒冷环境的沉积物通量，因此对环境变化特别敏感。然而，这些系统在短期和长期内表现出很高的水流和泥沙输移率的变化性，这对建立综合泥沙通量研究提出了具体问题。本文的目的是简要回顾在寒冷环境中的河流和河漫滩沉积物源的性质，并提出建议，测量河流沉积物通量从这些源汇。本文概述了一个框架，审查河流沉积物通量在寒冷的环境中，包括：在冰川和冰缘环境中的沉积物来源;测量河流沉积物转移的技术;和方法测量当代沉积在湖泊沉积物汇。在这一框架内，我们强调，特别重要的是，监测沉积物通量的方法必须保持一致，并采用适当的取样频率。我们建议在这些寒冷环境中建立综合沉积物通量研究的最合适方法是：以每月-每日的频率对山谷和斜坡沉积物储量进行重复调查和地面激光扫描;使用快速重新调查方法每周-每日进行推移质转移的沉积物预算;使用数据记录仪采集系统每小时或更好的悬浮物和溶质输运时间序列;使用沉积物积累传感器和/或被动沉积物收集器的每周-每日估计值监测湖泊沉积。拟议的综合框架的应用将提高我们的理解，在寒冷的环境中的沉积物通量，使我们能够更好地评估在当代和过去的沉积物通量的背景下，寒冷的环境对环境变化的敏感性。
Abstract. Fluvial processes dominate sediment flux from most cold environments and as such are particularly sensitive to environmental change. However, these systems demonstrate high variability in flow and sediment transfer rates in both the short and long‐term which presents specific problems for establishing integrated sediment flux studies. The objective of this paper is to briefly review the nature of fluvial and floodplain sediment sources in cold environments and to make recommendations on the measurement of fluvial sediment fluxes from these sources to sinks. The paper outlines a framework for examining fluvial sediment fluxes in cold environments including: sources of sediment in glacial and periglacial environments; techniques for measuring fluvial sediment transfers; and methods for measuring contemporary deposition in lacustrine sediment sinks. Within this framework, we stress that it is particularly important to provide consistency in methods for monitoring sediment flux and to adopt appropriate sampling frequencies. We recommend that the most appropriate methods for establishing integrated sediment flux studies in these cold environments are: repeat surveys and terrestrial laser scanning of valley and slope sediment stores on a monthly – daily frequency; weekly‐daily sediment budgeting of bedload transfer using rapid resurvey methods; hourly or better time series of suspended and solute transport using data logger acquisition systems; and monitoring of lacustrine sedimentation using sediment accumulation sensors and/or weekly‐daily estimates from passive sediment traps. Application of the proposed integrated framework will improve our understanding of sediment flux in cold environments and allow us to better assess the sensitivity of cold environments to environmental change within the context of contemporary and past sediment flux.
事件后不平衡状态下高山沉积物储量的变化及其对下游水文和底质输送的影响
DOI：
10.1080/00291950802095079
发表时间：
2008
期刊：
Norsk Geografisk Tidsskrift - Norwegian Journal of Geography
影响因子：
--
作者：
Morche;Schmidt;Sahling;Herkommer;Kutschera
通讯作者：
Kutschera