Start | Index | Overview • PREV | UP | NEXT LintulWaterStress calculates the transpiration reduction factor (TRANRF) based on the ratio between actual crop transpiration (TRAN in mm) and potential crop transpiration (PTRAN in mm):
\[ \begin{eqnarray} TRANRF &=& MIN(1,\frac{TRAN}{PTRAN} \cdot \frac{1}{DroughtTolerance}); \end{eqnarray} \]TRAN and PTRAN are provided by the SimComponent EvapTran.java. The SimComponent forsees another factor of "drought tolerance" (besides TRANCO in the SimComponent EvapTran.java) to dampen the effect of drought stress by directly reducing TRANRF, but changing the "DroughtTolerance" factor to values other than unity is strongly discouraged.
References: van Oijen, M. and P. Lefelaar. 2008. Lintul-2: water limited crop growth: A simple general crop growth model for water-limited growing conditions. Waageningen University, The Netherlands.
| Content Type | Name | Description | Data Type | Unit | Min Value | Max Value | Default Value |
|---|---|---|---|---|---|---|---|
| constant | cDroughtTolerance | Tolerance of plant for drought | DOUBLE | 1 | 0.0 | 1.0 | 1.0 |
| input | iActualTranspiration | Actual Transpiration | DOUBLE | mm/d | 0.0 | 10.0 | 0.0 |
| input | iPotentialTranspiration | Potential Transpiration | DOUBLE | mm/d | 0.0 | 10.0 | 0.0 |
| out | TRANRF | Transpiration reduction factor | DOUBLE | 1 | 0.0 | 1.0 | 1.0 |