Investigation of the groundwater modelling component of the Integrated Water Flow Model (IWFM)

Ercan A., Dogrul E. C. , Kadir T. N.

HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES, vol.61, no.16, pp.2834-2848, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 61 Issue: 16
  • Publication Date: 2016
  • Doi Number: 10.1080/02626667.2016.1161765
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2834-2848
  • Keywords: Integrated hydrological model, integrated surface and subsurface flow, hydrology, groundwater flow, verification, HYDROLOGY, CONDUCTIVITY, MANAGEMENT
  • Middle East Technical University Affiliated: No


The Integrated Water Flow Model (IWFM), developed by the California Department of Water Resources, is an integrated hydrological model that simulates key flow processes including groundwater flows, streamflow, stream-aquifer interactions, rainfall-runoff and infiltration. It also simulates the agricultural water demand as a function of soil, crop and climatic characteristics, as well as irrigation practices, and allows the user to meet these demands through pumping and stream diversions. This study investigates the modelling performance of the groundwater module of IWFM using several hypothetical test problems that cover a wide range of settings and boundary conditions, by comparing the simulation results with analytical solutions, field and laboratory observations, or with results from MODFLOW outputs. The comparisons demonstrate that IWFM is capable of simulating various hydrological processes reliably.