https://scholars.lib.ntu.edu.tw/handle/123456789/614745
Title: | Resolution and Ergodicity Issues of River Stage Tomography With Different Excitations | Authors: | YU-LI WANG Yeh T.-C.J. Wen J.-C. Gao X. Zhang Z. Huang S.-Y. |
Keywords: | Aquifers; Hydrogeology; Cross-correlation analysis; Different frequency; Estimated parameter; Heterogeneous aquifers; Hydraulic diffusivity; Monte Carlo experiments; Periodic excitations; Statistical significance; Parameter estimation; aquifer; correlation; Monte Carlo analysis; observational method; parameter estimation; river system; simulation; tomography | Issue Date: | 2019 | Publisher: | Blackwell Publishing Ltd | Journal Volume: | 55 | Journal Issue: | 6 | Start page/Pages: | 4974-4993 | Source: | Water Resources Research | Abstract: | This study investigates spatiotemporal cross correlation between the observed head and the hydraulic diffusivity parameters in heterogeneous aquifers under static and migrating periodic excitations with different frequencies and other factors and a moving single excitation along a river boundary. Results of the cross-correlation analysis are verified by estimating the parameters in a synthetic heterogeneous aquifer under these excitations. For assuring the statistical significance of the results based on a single realization, Monte Carlo experiments of estimating the parameters with these excitations are conducted. The experiments also explore the relationship between the resolution of the estimated parameters and the distance from the excitation to the observation wells, the frequency, and amplitude of the excitation and the mean diffusivity of the aquifer. In addition, the relationship between the resolution of the estimates and monitoring network spatial density is investigated. Finally, the usefulness of moving single excitations, effects of frequencies of the periodic excitations under different situations, the density of monitoring network in term of correlation scale, and the ergodicity issue corresponding to the number of observation and size of simulation domain are discussed. ©2019. American Geophysical Union. All Rights Reserved. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85067901248&doi=10.1029%2f2018WR023204&partnerID=40&md5=df2fe467796786c62d492ed3d01b9fe1 https://scholars.lib.ntu.edu.tw/handle/123456789/614745 |
ISSN: | 00431397 | Other Identifiers: | WRERA | DOI: | 10.1029/2018WR023204 |
Appears in Collections: | 生物環境系統工程學系 |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.