Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR022938 |
Estimation of Specific Yield and its Variability by Electrical Resistivity Tomography | |
Dietrich, Sebastian1,2; Carrera, Jesus3,4; Weinzettel, Pablo1,5; Sierra, Leonardo1,2 | |
2018-11-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:11页码:8653-8673 |
文章类型 | Article |
语种 | 英语 |
国家 | Argentina; Spain |
英文摘要 | Specific yield (Sy) is defined as the average volume of water that can be drained, per unit surface of aquifer per unit drop of head. This parameter is of critical relevance for groundwater resources assessment, but its estimation suffers from numerous difficulties, including spatial variability, hysteresis, dependence on depth to water table, or delayed drainage. As a result, no widely accepted method is available for its estimation. Here we show that most of these difficulties can be overcome by using time-lapse electrical resistivity tomography (ERT) to map water content variations in response to phreatic level fluctuations. We applied the method to a synthetic example and to a real site in Argentina. Results demonstrate that the approach is robust and provides a picture of how, how much and where water is being released from the soil when aquifer heads drop, which is the ultimate goal of Sy concept. ERT produced some oscillations in estimated water contents, which we attribute to inversion artifacts. Still, the error analysis and the synthetic example suggest that the impact of spurious oscillations tends to cancel out during estimation of Sy, which supports the robustness of the method. Estimated Sy is sensitive to the petrophysical law. If the slope of this law is inadequate, calculated values of Sy may be biased, but their variability patterns are well captured by the method. What is clear is that Sy is a spatially and temporally variable parameter, whose estimation is difficult. ERT represents a possible avenue to evaluate Sy and its variability. |
英文关键词 | specific yield electrical resistivity tomography unsaturated zone soil moisture soil heterogeneity inversion of resistivity data |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453369400007 |
WOS关键词 | WATER-TABLE ; JOINT INVERSION ; PUMPING TESTS ; SOIL ; AQUIFER ; CONDUCTIVITY ; PARAMETERS ; ERT ; INFILTRATION ; SENSITIVITY |
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/22012 |
专题 | 资源环境科学 |
作者单位 | 1.Inst Hidrol Llanuras Dr Eduardo J Usunoff, Azul, Argentina; 2.Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina; 3.GHS UPC CSIC, Hydrogeol Grp, IDAEA, Barcelona, Spain; 4.CSIC, Madrid, Spain; 5.Comis Invest Cient Prov Buenos Aires CIC, La Plata, Buenos Aires, Argentina |
推荐引用方式 GB/T 7714 | Dietrich, Sebastian,Carrera, Jesus,Weinzettel, Pablo,et al. Estimation of Specific Yield and its Variability by Electrical Resistivity Tomography[J]. WATER RESOURCES RESEARCH,2018,54(11):8653-8673. |
APA | Dietrich, Sebastian,Carrera, Jesus,Weinzettel, Pablo,&Sierra, Leonardo.(2018).Estimation of Specific Yield and its Variability by Electrical Resistivity Tomography.WATER RESOURCES RESEARCH,54(11),8653-8673. |
MLA | Dietrich, Sebastian,et al."Estimation of Specific Yield and its Variability by Electrical Resistivity Tomography".WATER RESOURCES RESEARCH 54.11(2018):8653-8673. |
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