Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020381 |
Dynamic linear models to explore time-varying suspended sediment-discharge rating curves | |
Ahn, Kuk-Hyun1; Yellen, Brian2; Steinschneider, Scott3 | |
2017-06-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | This study presents a new method to examine long-term dynamics in sediment yield using time-varying sediment-discharge rating curves. Dynamic linear models (DLMs) are introduced as a time series filter that can assess how the relationship between streamflow and sediment concentration or load changes over time in response to a wide variety of natural and anthropogenic watershed disturbances or long-term changes. The filter operates by updating parameter values using a recursive Bayesian design that responds to 1 day-ahead forecast errors while also accounting for observational noise. The estimated time series of rating curve parameters can then be used to diagnose multiscale (daily-decadal) variability in sediment yield after accounting for fluctuations in streamflow. The technique is applied in a case study examining changes in turbidity load, a proxy for sediment load, in the Esopus Creek watershed, part of the New York City drinking water supply system. The results show that turbidity load exhibits a complex array of variability across time scales. The DLM highlights flood event-driven positive hysteresis, where turbidity load remained elevated for months after large flood events, as a major component of dynamic behavior in the rating curve relationship. The DLM also produces more accurate 1 day-ahead loading forecasts compared to other static and time-varying rating curve methods. The results suggest that DLMs provide a useful tool for diagnosing changes in sediment-discharge relationships over time and may help identify variability in sediment concentrations and loads that can be used to inform dynamic water quality management. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405997000018 |
WOS关键词 | NEW-YORK ; SOUTHWESTERN VIRGINIA ; TURBIDITY MODEL ; RIVER ; RESERVOIR ; EVENTS ; WATER ; VARIABILITY ; FREQUENCY ; EROSION |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
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/22083 |
专题 | 资源环境科学 |
作者单位 | 1.Cornell Univ, Dept Biol & Environm Engn, Ithaca, NY 14850 USA; 2.Univ Massachusetts, Dept Geosci, Amherst, MA 01003 USA; 3.Cornell Univ, Dept Biol & Environm Engn, Ithaca, NY USA |
推荐引用方式 GB/T 7714 | Ahn, Kuk-Hyun,Yellen, Brian,Steinschneider, Scott. Dynamic linear models to explore time-varying suspended sediment-discharge rating curves[J]. WATER RESOURCES RESEARCH,2017,53(6). |
APA | Ahn, Kuk-Hyun,Yellen, Brian,&Steinschneider, Scott.(2017).Dynamic linear models to explore time-varying suspended sediment-discharge rating curves.WATER RESOURCES RESEARCH,53(6). |
MLA | Ahn, Kuk-Hyun,et al."Dynamic linear models to explore time-varying suspended sediment-discharge rating curves".WATER RESOURCES RESEARCH 53.6(2017). |
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