HowWet? Putting Farm Rainfall Records to Work
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HowWet? is a computer program which uses farm rainfall records to estimate:
The WINDOWS based HowWet? is a user-friendly educational tool as well as a decision support aid. Outcomes associated with different management scenarios and seasons can be examined by changing soil, management and starting conditions.
Inputs are simple - just select a range of soil types and climate localities from the menus then enter farm rainfall data. Tables of weekly temperatures and evaporation rates are held for each location. Default plant-available water capacities can be selected or overwritten to customise soil responses. The hydrology component of HowWet? is derived from the PERFECT and APSIM models.
Rainfall is entered in a simple spreadsheet calendar. District rainfall data can be entered from meteorological files, but generally the intention of HowWet? is to use farm rainfall data.
Output is given as tables of total rainfall, runoff, evaporation and mineralised nitrogen and a series of graphs depicting:
Denitrification under very wet conditions is not considered.
To download HowWet? (1.7MB) click here: HowWet? download