EXACT VARIATION IN GROUNDWATER LEVELS AMONG DIFFERENT PERMEABILITIES AND DISTRIBUTED STRUCTURE IDENTIFICATION OF INHOMOGENEOUS PERMEABILITIES

• HAMAGUCHI Toshio

  京都大学防災研究所

Bibliographic Information

Other Title

• 透水係数を変量とした地下水位変分量の厳密解と透水係数の不均一分布構造の同定

Abstract

This paper evinces a great performance of geostatistically estimating the modeling errors and a spatial distribution of permeabilities for two-dimensional groundwater flow. The exact variation in the water levels, which is equivalent to the accurate modeling errors, is formulated from the series solution of the finite element equation. A hypothetical aquifer into twenty piecewise zones, each of which has a constant permeability, is designed to allow assessing the errors and the level-variations in the homogeneous and heterogenous aquifers. Spatial estimation of the error complements and distributed structure identification of inhomogeneous permeabilities are herein carried out. A geostatistical model of the distributed permeabilities is integrated into the physical-based model. The statistical-based parameters in the integrated system are successfully identified from the physical-based observed data. It can be proven that such estimation and identification approaches are powerful and helpful in perfectly modeling.

Journal

• PROCEEDINGS OF HYDRAULIC ENGINEERING

  PROCEEDINGS OF HYDRAULIC ENGINEERING 48 361-366, 2004

  Japan Society of Civil Engineers

Keywords

• groundwater level
• inhomogeneous permeability
• exact variation
• modeling error
• parameter identification

Details

• CRID: 1390282680147516672
• NII Article ID: 130004043619
• DOI: 10.2208/prohe.48.361
• ISSN: 18849172
• ISSN: 09167374
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed