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Hydrology

CTD-Diver

CTD Diver

Corrosion Proof Multi-parameter Groundwater Datalogger

Features

  • Innovative ceramic housing technology
  • Three sensors in one sealed housing
  • Conductivity range up to 120 mS/cm
  • Compact size: Ø 22 mm - length 135 mm
  • Various measurement methods
  • 48,000 records of time stamp, pressure, temperature and conductivity
  • 30-Point pressure factory calibration

Benefits

MODFLOW-SURFACT Flow

MODFLOW-SURFACT Flow

MODLFOW SURFACT Features & Highlights

  • Dynamic memory allocation permits unlimited problem dimensions
  • Modular structure allows further development of additional simulation capabilities to provide a comprehensive, general purpose simulator within the MODFLOW framework

Recent Additions

Cochem Flow

Image of Cochem Flow

Although the specialty of COCHEM Flow is in modelling wet steam flow with homogeneous and heterogeneous condensation, the program can be also used for any other general calculations of two-dimensional compressible flow, including a transonic flow with shock waves. Thanks to the flexibility and robustness of the integrated FE-mesh generator, COCHEM Flow simulations can be done in any two-dimensional domain of arbitrary shape, including turbine planar blade cascades.

Meshgen

screen shot of Meshgen

The program consists of two standard modules, the Geometry Modeller and the FE-mesh Generator, and several other customizable modules for pre- and post-processing data (defining domain properties, boundary conditions and graphical display of results).

MESHGEN Plus has been used as a base library for the development of HYDRUS 2D/3D. Currently we are finishing a new version of MESHGEN Plus that can be used either as a stand-alone application (for preparing data for other FEM programs - see Meshgen Area 2011) or for the rapid development of new FEA programs.

Rect

These hydraulic properties are key parameters in any quantitative description of water flow into and through the unsaturated zone of soils. The program uses the parametric models of Brooks-Corey (1964), van Genuchten (1990), the lognormal distribution model of Kosugi (1996), and the dual-permeability model of Durner (1994)

Stanmod

screen shot of Stanmod

The software package includes a modified and updated version of the CXTFIT code of Toride et al.[1995] for estimating solute transport parameters using a nonlinear least-squares parameter optimization method. This code may be used to solve the inverse problem by fitting a variety of analytical solutions of theoretical transport models, based upon the one-dimensional advection-dispersion equation (ADE), to experimental results. The program may also be used to solve the direct or forward problem to determine concentrations as a function of time and/or position.

Hydrus

screenshot of Hydrus software

HYDRUS is a Microsoft Windows based modelling environment for the analysis of water flow and solute transport in variably saturated porous media. The software package includes computational finite element models for simulating the two- and three-dimensional movement of water, heat, and multiple solutes in variably saturated media. The model includes a parameter optimization algorithm for inverse estimation of a variety of soil hydraulic and/or solute transport parameters.

Water Environment

image of water

Our world is water. So whether you need to save water, share it fairly, improve its quality, quantify its impact or manage its flow, we can help. Our knowledge, combined with our team's expertise and the power of our technology, holds the key to unlocking the right solution.

DHI expertise spans all water environments – from rivers and reservoirs, to oceans and coastlines, to cities and factories.