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DOI | 10.1029/2017WR022304 |
Age-Ranked Storage-Discharge Relations: A Unified Description of Spatially Lumped Flow and Water Age in Hydrologic Systems | |
Harman, C. J.1,2 | |
2019-08-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:8页码:7143-7165 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A storage-discharge relation tells us how discharge will change when new water enters a hydrologic system but not which water is released. Does an incremental increase in discharge come from faster turnover of older water already in storage? Or are the recent inputs rapidly delivered to the outlet, "short-circuiting" the bulk of the system? Here I demonstrate that the concepts of storage-discharge relationships and transit time distributions can be unified into a single relationship that can usefully address these questions: the age-ranked storage-discharge relation. This relationship captures how changes in total discharge arise from changes in the turnover rate of younger and older water in storage and provides a window into both the celerity and velocity of water in a catchment. This leads naturally to a distinction between cases where an increase in total discharge is accompanied by an increase (old water acceleration), no change (old water steadiness), or a decrease in the rate of discharge of older water in storage (old water suppression). The simple theoretical case of a power law age-ranked storage-discharge relations is explored to illustrate these cases. Example applications to data suggest that the apparent presence of old water acceleration or suppression is sensitive to the functional form chosen to fit to the data, making it difficult to draw decisive conclusions. This suggests new methods are needed that do not require a functional form to be chosen and provide age-dependent uncertainty bounds. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490973700045 |
WOS关键词 | TRAVEL-TIME DISTRIBUTIONS ; CATCHMENT TRANSIT TIMES ; RESIDENCE TIME ; SELECTION FUNCTIONS ; RECESSION ANALYSIS ; CONCEPTUAL MODELS ; DOWNWARD APPROACH ; FLUX TRACKING ; TRANSPORT ; DYNAMICS |
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/185885 |
专题 | 资源环境科学 |
作者单位 | 1.Johns Hopkins Univ, Dept Environm Hlth & Engn, Baltimore, MD 21218 USA; 2.Johns Hopkins Univ, Dept Earth & Planetary Sci, Baltimore, MD 21218 USA |
推荐引用方式 GB/T 7714 | Harman, C. J.. Age-Ranked Storage-Discharge Relations: A Unified Description of Spatially Lumped Flow and Water Age in Hydrologic Systems[J]. WATER RESOURCES RESEARCH,2019,55(8):7143-7165. |
APA | Harman, C. J..(2019).Age-Ranked Storage-Discharge Relations: A Unified Description of Spatially Lumped Flow and Water Age in Hydrologic Systems.WATER RESOURCES RESEARCH,55(8),7143-7165. |
MLA | Harman, C. J.."Age-Ranked Storage-Discharge Relations: A Unified Description of Spatially Lumped Flow and Water Age in Hydrologic Systems".WATER RESOURCES RESEARCH 55.8(2019):7143-7165. |
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