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|width="300"| In this example the accumulated rainfall for the season 1991-1992 is calculated. The example is for Zimbabwe where the season starts around November. The current dekad is assumed to be the second dekad of March 1992. Start the “Database-Export” function. Start a new export format||[[Image:graph40.jpg|400px|]] | |width="300"| In this example the accumulated rainfall for the season 1991-1992 is calculated. The example is for Zimbabwe where the season starts around November. The current dekad is assumed to be the second dekad of March 1992. Start the “Database-Export” function. Start a new export format||[[Image:graph40.jpg|400px|]] | ||
|--- | |--- | ||
- | |width="300"|A lis containing Zimbabwean stations is selected. ||[[Image:graph41.jpg|400px|]] | + | |width="300"|A list containing Zimbabwean stations is selected. ||[[Image:graph41.jpg|400px|]] |
+ | |--- | ||
+ | |width="300"|All stations in the list are presented. Now add columns with the Add button. ||[[Image:graph42.jpg|400px|]] | ||
+ | |--- | ||
+ | |width="300"|All stations in the list are presented. Now add columns with the Add button. ||[[Image:graph43.jpg|400px|]] | ||
+ | |--- | ||
+ | |width="300"|All stations in the list are presented. Now add columns with the Add button. ||[[Image:graph44.jpg|400px|]] | ||
+ | |--- | ||
+ | |width="300"|All stations in the list are presented. Now add columns with the Add button. ||[[Image:graph45.jpg|400px|]] | ||
+ | |--- | ||
+ | |width="300"|All stations in the list are presented. Now add columns with the Add button. ||[[Image:graph46.jpg|400px|]] | ||
+ | |--- | ||
+ | |width="300"|All stations in the list are presented. Now add columns with the Add button. ||[[Image:graph47.jpg|400px|]] | ||
|--- | |--- | ||
|} | |} |
Revision as of 10:21, 18 August 2006
Preparation of ten-daily rainfall and ET0 maps for crop forecasting
Crop forecasting based on water balance calculations is usually done in a ten-day timestep. A ten day period is called a “dekad”. However, should daily weather data of good spatial and temporal extend be available, the water balance can be run in AgrometShell on a daily basis.
In order to do crop forecasting the following weather data have to be gathered:
- Actual decadal rainfall data for the running season.
- Actual decadal ET0 data for the running season
- Normal rainfall data
- Normal ET0 data
These data form indicators in itself, even without using them directly in a water balance calculation. Some examples are given below:
A simple rainfall map for the current dekad
Accumulated rainfall from the beginning of the season