Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR020258 |
Earthworms and tree roots: A model study of the effect of preferential flow paths on runoff generation and groundwater recharge in steep, saprolitic, tropical lowland catchments | |
Cheng, Yanyan; Ogden, Fred L.; Zhu, Jianting | |
2017-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Preferential flow paths (PFPs) affect the hydrological response of humid tropical catchments but have not received sufficient attention. We consider PFPs created by tree roots and earthworms in a near-surface soil layer in steep, humid, tropical lowland catchments and hypothesize that observed hydrological behaviors can be better captured by reasonably considering PFPs in this layer. We test this hypothesis by evaluating the performance of four different physically based distributed model structures without and with PFPs in different configurations. Model structures are tested both quantitatively and qualitatively using hydrological, geophysical, and geochemical data both from the Smithsonian Tropical Research Institute Agua Salud Project experimental catchment(s) in Central Panama and other sources in the literature. The performance of different model structures is evaluated using runoff Volume Error and three Nash-Sutcliffe efficiency measures against observed total runoff, stormflows, and base flows along with visual comparison of simulated and observed hydrographs. Two of the four proposed model structures which include both lateral and vertical PFPs are plausible, but the one with explicit simulation of PFPs performs the best. A small number of vertical PFPs that fully extend below the root zone allow the model to reasonably simulate deep groundwater recharge, which plays a crucial role in base flow generation. Results also show that the shallow lateral PFPs are the main contributor to the observed high flow characteristics. Their number and size distribution are found to be more important than the depth distribution. Our model results are corroborated by geochemical and geophysical observations. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407895000012 |
WOS关键词 | LUQUILLO EXPERIMENTAL FOREST ; FISSURED GRANITIC CATCHMENT ; RAIN-FOREST ; BURROW SYSTEMS ; POROUS-MEDIA ; SECONDARY SUCCESSION ; STORMFLOW GENERATION ; HYDROLOGICAL PROCESS ; WATER INFILTRATION ; EASTERN MADAGASCAR |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21461 |
专题 | 资源环境科学 |
作者单位 | Univ Wyoming, Dept Civil & Architectural Engn, Laramie, WY 82071 USA |
推荐引用方式 GB/T 7714 | Cheng, Yanyan,Ogden, Fred L.,Zhu, Jianting. Earthworms and tree roots: A model study of the effect of preferential flow paths on runoff generation and groundwater recharge in steep, saprolitic, tropical lowland catchments[J]. WATER RESOURCES RESEARCH,2017,53(7). |
APA | Cheng, Yanyan,Ogden, Fred L.,&Zhu, Jianting.(2017).Earthworms and tree roots: A model study of the effect of preferential flow paths on runoff generation and groundwater recharge in steep, saprolitic, tropical lowland catchments.WATER RESOURCES RESEARCH,53(7). |
MLA | Cheng, Yanyan,et al."Earthworms and tree roots: A model study of the effect of preferential flow paths on runoff generation and groundwater recharge in steep, saprolitic, tropical lowland catchments".WATER RESOURCES RESEARCH 53.7(2017). |
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