Testing the Fill-and-Spill Model ofSubsurface Lateral Flow Using GroundPenetrating Radar and Dye Tracing

doi:10.2136/vzj2017.07.0142

IEECAS OpenIR > 黄土与第四纪地质国家重点实验室（2010~）

	Testing the Fill-and-Spill Model ofSubsurface Lateral Flow Using GroundPenetrating Radar and Dye Tracing
	Nyquist, J.E(Nyquist,Jonathan E)1; Toran, L(Toran, Laura)1; Pitman, L( Pitman, Lacey)1; Guo,L(Guo,Li)2; Lin,H(Lin,Henry)2,3; Nyquist,Jonathan E
	2018-03
发表期刊	Vadose Zone Journal
卷号	17 期号:1
文章类型	期刊论文
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 ~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.
DOI	10.2136/vzj2017.07.0142
收录类别	SCI
所属项目编号	EAR 07-25019 ; EAR 12-39285 ; EAR 13-31726
语种	英语
项目资助者	National Science Foundation Critical ZoneObservatory program ; National Science Foundation Critical ZoneObservatory program
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/5366
专题	黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Nyquist,Jonathan E
作者单位	1.Dep. of Earth and EnvironmentalScience, Temple Univ., Philadelphia,PA 19122 2.Dep.of Ecosystem Science and Management, Pennsylvania State Univ.,University Park, PA 16802 3.Dep.of Eco-Environment, Institute of EarthEnvironment, Chinese Academy ofSciences, Xi’an, China
推荐引用方式 GB/T 7714	Nyquist, J.E,Toran, L,Pitman, L,et al. Testing the Fill-and-Spill Model ofSubsurface Lateral Flow Using GroundPenetrating Radar and Dye Tracing[J]. Vadose Zone Journal,2018,17(1).
APA	Nyquist, J.E,Toran, L,Pitman, L,Guo,L,Lin,H,&Nyquist,Jonathan E.(2018).Testing the Fill-and-Spill Model ofSubsurface Lateral Flow Using GroundPenetrating Radar and Dye Tracing.Vadose Zone Journal,17(1).
MLA	Nyquist, J.E,et al."Testing the Fill-and-Spill Model ofSubsurface Lateral Flow Using GroundPenetrating Radar and Dye Tracing".Vadose Zone Journal 17.1(2018).

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