Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR022586 |
Drought Conditions Maximize the Impact of High-Frequency Flow Variations on Thermal Regimes and Biogeochemical Function in the Hyporheic Zone | |
Song, Xuehang1; Chen, Xingyuan1; Stegen, James1; Hammond, Glenn2; Song, Hyun-Seob1; Dai, Heng1; Graham, Emily1; Zachara, John M.1 | |
2018-10-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:10页码:7361-7382 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Anthropogenic activities, especially dam operations, often induce larger and more frequent stage fluctuations than those occurring in natural rivers. However, long-term impacts of such flow variations on thermal and biogeochemical dynamics of the associated hyporheic zone (HZ) are poorly understood. In this study, we built a heterogeneous, two-dimensional, thermo-hydro-biogeochemical model for an aerobic respiration dominated river system. Our results revealed important interactions between subdaily to weekly flow variations and mean flow conditions controlled by snowpack at the watershed. High-frequency stage fluctuations had their strongest thermal and biogeochemical impacts when mean river stage was low during fall and winter. In an abnormal drought year (2015) with low river stages during summer and early fall, high-frequency stage fluctuations caused the HZ to be warmer than average. Furthermore, high-frequency stage fluctuation enhanced all biogeochemical reactions by increasing nutrient supply and creating more oxygenated conditions. Overall carbon consumption in the HZ increased due to high-frequency flow variations. Thermal dynamics altered by high-frequency stage fluctuation impacted biogeochemical reactions in the HZ less than effects imposed by enhanced nutrient and oxygen supply. In addition to these results, we demonstrated that the HZ's hydrogeologic properties control flow paths that influence residence times and nutrient supply and consequently control spatial distribution of biogeochemical reaction hot spots in the HZ. Here we provide scientific basis for assessing potential ecological consequences of high-frequency flow variations in a regulated river, as well as guidance for maximizing potential benefits-or minimizing drawbacks-of dam regulation to riverine ecosystems. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450726000015 |
WOS关键词 | FALL CHINOOK SALMON ; RIVER STAGE ; HYDRAULIC CONDUCTIVITY ; CHANNEL MORPHOLOGY ; GROUNDWATER-FLOW ; RIPARIAN ZONE ; EXCHANGE ; DENITRIFICATION ; TEMPERATURE ; TRANSPORT |
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/19985 |
专题 | 资源环境科学 |
作者单位 | 1.Pacific Northwest Natl Lab, Richland, WA 99354 USA; 2.Sandia Natl Labs, Appl Syst Anal & Res, POB 5800, Albuquerque, NM 87185 USA |
推荐引用方式 GB/T 7714 | Song, Xuehang,Chen, Xingyuan,Stegen, James,et al. Drought Conditions Maximize the Impact of High-Frequency Flow Variations on Thermal Regimes and Biogeochemical Function in the Hyporheic Zone[J]. WATER RESOURCES RESEARCH,2018,54(10):7361-7382. |
APA | Song, Xuehang.,Chen, Xingyuan.,Stegen, James.,Hammond, Glenn.,Song, Hyun-Seob.,...&Zachara, John M..(2018).Drought Conditions Maximize the Impact of High-Frequency Flow Variations on Thermal Regimes and Biogeochemical Function in the Hyporheic Zone.WATER RESOURCES RESEARCH,54(10),7361-7382. |
MLA | Song, Xuehang,et al."Drought Conditions Maximize the Impact of High-Frequency Flow Variations on Thermal Regimes and Biogeochemical Function in the Hyporheic Zone".WATER RESOURCES RESEARCH 54.10(2018):7361-7382. |
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