SWAGSIM Description

SWAGSIM Modules

The fact that groundwater tends to move, at a district scale, quite independently of property boundaries, requires a management response beyond farm boundaries. SWAGSIM does this by noting where recharge and discharge are occurring and tracking groundwater movement at the district (or subregional) scale. SWAGSIM accounts for water balance processes in an irrigation area through three modules. The first uses data on rainfall irrigation applications, daily air temperature, wind and radiation to calculate the amount of water entering or leaving the soil at the land surface. This calculation (of net flux) uses a modified Penman model. The second estimates daily recharge or discharge to the water table. It uses the net flux calculated above, depth to the water table and data on soil properties. A transient analytical solution for Richards' equation is used for this purpose. The third module estimates changes to groundwater levels. Hydrological conditions are taken into account, and a finite-difference groundwater flow model is used. These modules allow SWAGSIM to model regional water-table fluctuations to locate recharge or discharge zones and calculate the rates of these processes. It can also determine how much pumping is needed to control salinization and estimate groundwater discharge into streams.

SWAGSIM Model Uses

• Model Crop Water Use, Unsaturated Flow in Soils, Surface Runoff, Recharge to Water Table and Groundwater Flow
• Model Hydraulics of Water Wells, Rivers, Drains and Evaporation Basins
• Variable Boundary Conditions
• Meaningful Icons for Climate, Irrigation, Land Use, Pumps and Rivers

SWAGSIM Features

• Standard Windows Interface with Mouse Control
• Graphical Display of Input and Output
• Data Analysis Using Microsoft Access

SWAGSIM Applications

• Water and Salinity Management in Irrigation Areas
• Evaluate Drainage Options for Water Logging and Salinity Control
• Crop Impact Studies
• Design Artificial Recharge and Evaporation Basins
• Land Management
• Management of Shallow Water Tables
• Recharge/Discharge Studies
• Groundwater Pumping

SWAGSIM is a two-part application. You can create and maintain a database of data for a simulation and run models against this data or variants of it. Each session loads a temporary copy of the selected database. Any modifications to the data will effect simulations run during the session, but will only become permanent if they are saved when the session is ended.

The data in SWAGSIM is held in a Microsoft Access Version 1.1 database to allow simple reporting and data extraction if you have Microsoft Access. It is not necessary to own Microsoft Access unless you want to extract data.

Data can be imported into an existing database or used to create a new database.

SWAGSIM Imported Data Formats

Format of ASCII text files that can be imported into SWAGSIM. All dates should be DD-MM-YY format

Boundary Flux
data "Boundary Flux"
row column fixed-boundary flux

Constant Heads
data "Constant Heads"
row column

Evaporation Basins
data "Evaporation Basins"
row column start-date end-date area-in-square-meters leakance

Field/Paddock Cells
data "Field Cells"
field field-number number-of-cells
row column
field field-number-2 number-of-cells

Grid
data "grid"
cell width full-cell-width-in-meters height full-cell-height-in-meters
grid rows number-of-rows columns number-of-columns
row column cell-width cell-height

Initial Confined Piezo levels
data "initial piezo level confined"
row column piezo level

Initial Unconfined Piezo levels
data "initial piezo level unconfined"
row column piezo level

Irrigation Data
data "irrigation"
field-id start-date end-date total-volume-in-mega-litres

Leakance
data "leakance"
row column leakance

Land Use
data "land use"
field-id start-date end-date "crop"

Link Soil to field
data "field soil type"
field-id soil-local-name

Mole Drains
data "Mole Drain"
row column depth-in-meters area-in-square-meters

No Flow Boundary Conditions
data "no flow"
row column

Pumps
data "pumps"
row column pump-id start-date end-date volume-in-megaliters-per-day

Rivers
data "River Cells"
row column Kv river-length river-width bed-thickness head bottom

SWAGSIM Requirements

Pentium running Windows 95/98/2000/NT with 12 MB free hard disk space.

SWAGSIM Overview
SWAGSIM Detailed Description
SWAGSIM Prices
SWAGSIM Demo

Scientific Software Group    P.O. Box 23041    Washington, DC 20026-3041
Phone (703) 620-9214   Fax (703) 620-6793   E-mail info@scisoftware.com
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