Groundwater‐stream connectivity from minutes to months across United States basins as revealed by spectral analysis
Groundwater‐stream connectivity from minutes to months across United States basins as revealed by spectral analysis
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光谱分析显示，美国流域地下水流连通性从几分钟到几个月不等
DOI：
10.1002/hyp.14514
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发表时间：
2022
影响因子：
3.2
通讯作者：
Sawyer, Audrey H.
中科院分区：
文献类型：
--
作者：
Clyne, Jacob B.;Sawyer, Audrey H.
河流廊道是河流和含水层在不同程度上相互连接和相互作用的动态场所，这取决于地质、气候、河流形态和用水方式。地下水位波动在无承压含水层中传播，并与向河流输出溶质的变化和洪泛区土壤的生物地球化学变化有关。通过公开可用的USGS数据，本研究旨在通过分析17对流计和附近（<100米）地下水监测井的连续时间序列的水位，更好地了解流-地下水连通性和地下水位波动的行为。这些地点位于美国18个主要水文单元（HUC‐2）中的8个，涵盖了各种河流大小、气候和土地利用方式。超过50%的地点的地下水位常年保持在地表3米以内。能量谱密度和交叉小波变换通常揭示了水位和河流阶段在日至月周期之间的强相干性。传递函数描述了地下水位和河流阶段之间的相对变化，表明17个站点中有10个站点在日和月频率上更受河流支配，这意味着河流中的水位波动更大，并传播到含水层。在17个地点中，按日和月频率计算，只有1个地点地下水占主导地位，这意味着含水层中的水位波动更大。本研究显示了频域分析在揭示河流-含水层相互作用的特定时间尺度方面的效用。
Stream corridors are dynamic places where streams and aquifers are connected and interact to various degrees, depending on geology, climate, stream morphology, and water use. Water table fluctuations propagate through the unconfined aquifer and are linked with changes in solute export to streams and biogeochemical transformations in floodplain soils. Through publicly available USGS data, this study aims to better understand the behaviour of stream‐groundwater connectivity and water table fluctuations by analysing continuous time series of water levels from 17 pairs of stream gauges and nearby (<100 m) groundwater monitoring wells. Sites are located within 8 of 18 major hydrologic units (HUC‐2) across the contiguous United States and span a variety of stream sizes, climates, and land use practises. More than 50% of sites have a water table that remains within 3 m of the land surface year‐round. Energy spectral densities and cross‐wavelet transformations generally reveal strong coherence between the water table and stream stage over daily to monthly periods. The transfer function, which describes relative variations between the water table and stream stage, shows that 10 of 17 sites are more stream‐dominated at daily and monthly frequencies, meaning that water level fluctuations are greater in the stream and propagate into the aquifer. Only 1 of 17 sites is more groundwater‐dominated at daily and monthly frequencies, meaning that water level fluctuations are greater in the aquifer. This study shows the utility of frequency‐domain analysis for revealing specific timescales of stream‐aquifer interaction.
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影响因子：
5.4
作者：
B. Mojarrad;J. Riml;A. Wörman;H. Laudon
通讯作者：
H. Laudon
潮汐河流和地下水水位的光谱响应
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
D. C. Shih;K. Chiou;Chin;I
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I
测量站的阶段测量
DOI：
10.3133/twri03a7
发表时间：
1968
期刊：
Techniques of water-resources investigations
影响因子：
--
作者：
Thomas J. Buchanan;W. P. Somers
通讯作者：
W. P. Somers
井造成的径流消耗——了解和管理地下水抽取对径流的影响
影响因子：
2.6
作者：
P. Barlow;S. Leake
通讯作者：
S. Leake
含水层对半透水流正弦或任意阶段的响应
DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
S. Singh
通讯作者：
S. Singh