Testing the Fill-and-Spill Model of Subsurface Lateral Flow Using Ground- Penetrating Radar and Dye Tracing

doi:10.2136/vzj2017.07.0142

	Testing the Fill-and-Spill Model of Subsurface Lateral Flow Using Ground- Penetrating Radar and Dye Tracing
	Nyquist, Jonathan E.2; Toran, Laura 2; Pitman, Lacey 2; Guo, Li 1; Lin, Henry 1,3
刊名	VADOSE ZONE JOURNAL
	2018-05-17
卷号	17 期号:1 页码:13
ISSN号	1539-1663
DOI	10.2136/vzj2017.07.0142
通讯作者	Nyquist, Jonathan E.(nyq@temple.edu)
英文摘要	Preferential flow (PF), which bypasses large portions of the soil or subsurface matrix, is critical in the transport of water and dissolved constituents in the unsaturated zone. To test the "fill-and-spill" model of hillslope hydrology that describes the generation and pattern of downslope lateral PF after storms, we used dye tracer and time-lapse, ground-penetrating radar (GPR) on a forested hillslope in the Susquehanna-Shale Hills Critical Zone Observatory. We injected 50 L of water mixed with Brilliant Blue dye (4 g L-1) into a shallow trench cut perpendicular to the slope and used GPR to monitor the tracer downslope across a 1.0- by 2.0-m grid. The site was then excavated to the soil-saprock interface and photographed to document the dye pathways. We observed vertical dye fingering near the infiltration trench. Downslope lateral PF at the soil-saprock boundary was limited to similar to 0.40 m, which is evidence that the soil-saprock interface did not fill-and-spill. The extent, depth, and direction of the downslope PF indicated by GPR generally matched the dye staining patterns in the excavation, but the resolution of the 800-MHz GPR antenna was insufficient to distinguish small fingers of dye. A revised filland-spill model was proposed for this site that incorporates the PF through fractured saprock before water encounters fresh bedrock surface. This study demonstrates that GPR integrated with dye tracer infiltration can provide a useful means of testing hillslope hydrological hypotheses and unraveling the complexity of PF at the hillslope scale in a field setting.
资助项目	National Science Foundation Critical Zone Observatory program ; Pennsylvania State University[EAR 07-25019] ; Pennsylvania State University[EAR 12-39285] ; Pennsylvania State University[EAR 13-31726] ; Penn State's Forestland Management Office in the College of Agricultural Sciences ; US National Science Foundation Hydrologic Sciences Program[EAR-1416881]
WOS关键词	SOIL-WATER CONTENT ; PREFERENTIAL FLOW ; HILLSLOPE ; SUSCEPTIBILITY ; HYDROLOGY ; NETWORK
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
语种	英语
出版者	SOIL SCI SOC AMER
WOS记录号	WOS:000439703900001
资助机构	National Science Foundation Critical Zone Observatory program ; Pennsylvania State University ; Penn State's Forestland Management Office in the College of Agricultural Sciences ; US National Science Foundation Hydrologic Sciences Program
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/13213]
专题	地球环境研究所_生态环境研究室
通讯作者	Nyquist, Jonathan E.
作者单位	1.Penn State Univ, Dept Ecosyst Sci & Management, University Pk, PA 16802 USA 2.Temple Univ, Dept Earth & Environm Sci, Philadelphia, PA 19122 USA 3.Chinese Acad Sci, Inst Earth Environm, Dept Ecoenvironm, Xian, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Nyquist, Jonathan E.,Toran, Laura,Pitman, Lacey,et al. Testing the Fill-and-Spill Model of Subsurface Lateral Flow Using Ground- Penetrating Radar and Dye Tracing[J]. VADOSE ZONE JOURNAL,2018,17(1):13.
APA	Nyquist, Jonathan E.,Toran, Laura,Pitman, Lacey,Guo, Li,&Lin, Henry.(2018).Testing the Fill-and-Spill Model of Subsurface Lateral Flow Using Ground- Penetrating Radar and Dye Tracing.VADOSE ZONE JOURNAL,17(1),13.
MLA	Nyquist, Jonathan E.,et al."Testing the Fill-and-Spill Model of Subsurface Lateral Flow Using Ground- Penetrating Radar and Dye Tracing".VADOSE ZONE JOURNAL 17.1(2018):13.