Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/hyp.9545 |
A method for estimating spatially variable seepage and hydraulic conductivity in channels with very mild slopes | |
Shanafield, Margaret1; Niswonger, Richard G.2; Prudic, David E.3; Pohll, Greg1; Susfalk, Richard1; Panday, Sorab4 | |
通讯作者 | Shanafield, Margaret |
来源期刊 | HYDROLOGICAL PROCESSES
![]() |
ISSN | 0885-6087 |
EISSN | 1099-1085 |
出版年 | 2014 |
卷号 | 28期号:1页码:51-61 |
英文摘要 | Infiltration along ephemeral channels plays an important role in groundwater recharge in arid regions. A model is presented for estimating spatial variability of seepage due to streambed heterogeneity along channels based on measurements of streamflow-front velocities in initially dry channels. The diffusion-wave approximation to the Saint-Venant equations, coupled with Philip’s equation for infiltration, is connected to the groundwater model MODFLOW and is calibrated by adjusting the saturated hydraulic conductivity of the channel bed. The model is applied to portions of two large water delivery canals, which serve as proxies for natural ephemeral streams. Estimated seepage rates compare well with previously published values. Possible sources of error stem from uncertainty in Manning’s roughness coefficients, soil hydraulic properties and channel geometry. Model performance would be most improved through more frequent longitudinal estimates of channel geometry and thalweg elevation, and with measurements of stream stage over time to constrain wave timing and shape. This model is a potentially valuable tool for estimating spatial variability in longitudinal seepage along intermittent and ephemeral channels over a wide range of bed slopes and the influence of seepage rates on groundwater levels. Copyright (c) 2012 John Wiley & Sons, Ltd. |
英文关键词 | infiltration groundwater surface water interaction diffusion analogy ephemeral Saint-Venant |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000328569800007 |
WOS关键词 | SURFACE-WATER ; GROUNDWATER RECHARGE ; EPHEMERAL CHANNELS ; ARID REGIONS ; FLOW ; MODEL ; INFILTRATION ; STREAM ; SIMULATION ; LOSSES |
WOS类目 | Water Resources |
WOS研究方向 | Water Resources |
来源机构 | United States Geological Survey ; Desert Research Institute |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/182447 |
作者单位 | 1.Desert Res Inst, Reno, NV 89512 USA; 2.US Geol Survey, Carson City, NV USA; 3.Univ Nevada, Reno, NV 89557 USA; 4.AMEC Geomatrix Inc, Herndon, VA USA |
推荐引用方式 GB/T 7714 | Shanafield, Margaret,Niswonger, Richard G.,Prudic, David E.,et al. A method for estimating spatially variable seepage and hydraulic conductivity in channels with very mild slopes[J]. United States Geological Survey, Desert Research Institute,2014,28(1):51-61. |
APA | Shanafield, Margaret,Niswonger, Richard G.,Prudic, David E.,Pohll, Greg,Susfalk, Richard,&Panday, Sorab.(2014).A method for estimating spatially variable seepage and hydraulic conductivity in channels with very mild slopes.HYDROLOGICAL PROCESSES,28(1),51-61. |
MLA | Shanafield, Margaret,et al."A method for estimating spatially variable seepage and hydraulic conductivity in channels with very mild slopes".HYDROLOGICAL PROCESSES 28.1(2014):51-61. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。