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

doi:10.2136/vzj2017.07.0142

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 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
	Guo,L(Guo,Li)3; Lin,H(Lin,Henry)2,3; Nyquist,Jonathan E ; Nyquist, J.E(Nyquist,Jonathan E)1; Toran, L(Toran, Laura)1; Pitman, L( Pitman, Lacey)1
刊名	Vadose Zone Journal
	2018-03
卷号	17 期号:1
DOI	10.2136/vzj2017.07.0142
文献子类	期刊论文
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 ~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.
项目编号	EAR 07-25019 ; EAR 12-39285 ; EAR 13-31726
语种	英语
资助机构	National Science Foundation Critical ZoneObservatory program ; National Science Foundation Critical ZoneObservatory program
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5366]
专题	地球环境研究所_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 Eco-Environment, Institute of EarthEnvironment, Chinese Academy ofSciences, Xi’an, China 3.Dep.of Ecosystem Science and Management, Pennsylvania State Univ.,University Park, PA 16802
推荐引用方式 GB/T 7714	Guo,L,Lin,H,Nyquist,Jonathan E,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	Guo,L,Lin,H,Nyquist,Jonathan E,Nyquist, J.E,Toran, L,&Pitman, L.(2018).Testing the Fill-and-Spill Model ofSubsurface Lateral Flow Using GroundPenetrating Radar and Dye Tracing.Vadose Zone Journal,17(1).
MLA	Guo,L,et al."Testing the Fill-and-Spill Model ofSubsurface Lateral Flow Using GroundPenetrating Radar and Dye Tracing".Vadose Zone Journal 17.1(2018).