Statistic inversion of multi-zone transition probability models for aquifer characterization in alluvial fans
- Capital Normal Univ., Beijing (China). College of Resources, Environment and Tourism. Lab. Cultivation Base of Environment Process and Digital Simulation; Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Earth and Environmental Sciences Division
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Earth and Environmental Sciences Division
- Capital Normal Univ., Beijing (China). College of Resources, Environment and Tourism. Lab. Cultivation Base of Environment Process and Digital Simulation
- Univ. of Padua (Italy). Dept. of Civil, Environmental and Architectural Engineering
Understanding the heterogeneity arising from the complex architecture of sedimentary sequences in alluvial fans is challenging. This study develops a statistical inverse framework in a multi-zone transition probability approach for characterizing the heterogeneity in alluvial fans. An analytical solution of the transition probability matrix is used to define the statistical relationships among different hydrofacies and their mean lengths, integral scales, and volumetric proportions. A statistical inversion is conducted to identify the multi-zone transition probability models and estimate the optimal statistical parameters using the modified Gauss–Newton–Levenberg–Marquardt method. The Jacobian matrix is computed by the sensitivity equation method, which results in an accurate inverse solution with quantification of parameter uncertainty. We use the Chaobai River alluvial fan in the Beijing Plain, China, as an example for elucidating the methodology of alluvial fan characterization. The alluvial fan is divided into three sediment zones. In each zone, the explicit mathematical formulations of the transition probability models are constructed with optimized different integral scales and volumetric proportions. The hydrofacies distributions in the three zones are simulated sequentially by the multi-zone transition probability-based indicator simulations. Finally, the result of this study provides the heterogeneous structure of the alluvial fan for further study of flow and transport simulations.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Capital Normal Univ., Beijing (China)
- Sponsoring Organization:
- USDOE; National Natural Science Foundation of China (NSFC); Beijing Nova Program (China); Beijing Young Talent Program (China)
- Contributing Organization:
- Univ. of Padua (Italy)
- Grant/Contract Number:
- 41201420; 41130744; Z111106054511097
- OSTI ID:
- 1325631
- Report Number(s):
- LA-UR-15-20404
- Journal Information:
- Stochastic environmental research and risk assessment, Vol. 30, Issue 3; ISSN 1436-3240
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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