Journal article
Effect of heterogeneity on spatiotemporal variations of groundwater level in a bounded unconfined aquifer
Stochastic environmental research and risk assessment, Vol.30(1), pp.1-8
01/01/2016
DOI: 10.1007/s00477-014-0990-4
Abstract
Spatiotemporal variations of groundwater level due to a white noise recharge time series and a random transmissivity field in a bounded unconfined aquifer was studied. The analytical solutions for the variance and covariance of groundwater level were derived with non-stationary spectral analyses and superposition principle. It was found that the fluctuations of groundwater level are spatially non-stationary due to a fixed head boundary condition and temporal non-stationary at early time but gradually became stationary as time progresses due to effect of the initial condition. The variation in groundwater level is mainly caused by the random source/sink in the case of temporally random recharge and spatially random transmissivity. The effect of heterogeneity is to increase the variation of groundwater level and the maximum effect occurs close to the constant head boundary because of the linear mean hydraulic gradient. The heterogeneity also enhances the correlation of groundwater level, especially at large time intervals and small spatial distances.
Details
- Title: Subtitle
- Effect of heterogeneity on spatiotemporal variations of groundwater level in a bounded unconfined aquifer
- Creators
- Xiuyu Liang - Nanjing UniversityYou-Kuan Zhang - Nanjing UniversityKeith Schilling - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Stochastic environmental research and risk assessment, Vol.30(1), pp.1-8
- Publisher
- Springer Nature
- DOI
- 10.1007/s00477-014-0990-4
- ISSN
- 1436-3240
- eISSN
- 1436-3259
- Number of pages
- 8
- Grant note
- NSFC-41272260; NSFC-41330314; NSFC-41302180 / National Nature Science Foundation of China; National Natural Science Foundation of China (NSFC) SBK201341336 / Natural Science Foundation of Jiangsu Province
- Language
- English
- Date published
- 01/01/2016
- Academic Unit
- Earth and Environmental Sciences; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984383887002771
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