Hi All,
I am reading the CLM5 crop model tech note and the IrrigationMod.F90, trying to figure out how rainfed and irrigated crops (especially rice) impact the soil moisture. I have a few questions about the crop model, and it is very appreciated if anyone can help!
1. According to the description on irrigation model 2.26. Crops and Irrigation — ctsm release-clm5.0 documentation, the irrigation flux is calculated based on a set of parameters like 'irrig_target_smp', 'irrig_threshold_fraction'. These irrigation-related parameters seem to be universal values as specified in Table 2.26.4. Is it correct to say if the irrigated rice and irrigated cotton in one grid cell have exactly the same soil moisture (and other physical states), their irrigation amounts should be the same?
2. I think the IrrigationMod does not consider 'flooding irrigation', is that right? For rainfed/irrigated rice, they should be flooded during their growing season, but it seems that this process is not incorporated in the IrrigationMod. If the irrigationMod does consider flooding irrigation, how does it impact the soil moisture (and other physical states of the rice patch)?
3. Is it correct to say: The major difference between the rainfed and irrigated crop is whether there is qflx_irrig_patch into soil.
The major difference between the rainfed crop and natural vegetation is that they have different values for stomatal conductance parameters, optical parameters, leaf N parameters and so on.
Any insights are appreciated! Thanks!
Keer
I am reading the CLM5 crop model tech note and the IrrigationMod.F90, trying to figure out how rainfed and irrigated crops (especially rice) impact the soil moisture. I have a few questions about the crop model, and it is very appreciated if anyone can help!
1. According to the description on irrigation model 2.26. Crops and Irrigation — ctsm release-clm5.0 documentation, the irrigation flux is calculated based on a set of parameters like 'irrig_target_smp', 'irrig_threshold_fraction'. These irrigation-related parameters seem to be universal values as specified in Table 2.26.4. Is it correct to say if the irrigated rice and irrigated cotton in one grid cell have exactly the same soil moisture (and other physical states), their irrigation amounts should be the same?
2. I think the IrrigationMod does not consider 'flooding irrigation', is that right? For rainfed/irrigated rice, they should be flooded during their growing season, but it seems that this process is not incorporated in the IrrigationMod. If the irrigationMod does consider flooding irrigation, how does it impact the soil moisture (and other physical states of the rice patch)?
3. Is it correct to say: The major difference between the rainfed and irrigated crop is whether there is qflx_irrig_patch into soil.
The major difference between the rainfed crop and natural vegetation is that they have different values for stomatal conductance parameters, optical parameters, leaf N parameters and so on.
Any insights are appreciated! Thanks!
Keer