3 research outputs found
Optimizing subsurface dripline installation depth with Hydrus 2D/3D to improve irrigation water use efficiency in the central Tunisia
The main objective of the work is to optimize drip installation depth for Eggplant crop irrigated with surface or subsurface drip irrigation systems to improve irrigation Water Use Effeciency (WUE), by means of field measurements and simulations carried out with Hydrus-2D model. Initially, a comparison between simulated Soil Water Contents (SWC) and the corresponding measured in two plots, in which laterals with coextruded emitters are laid on the soil surface (T0) and at 20 cm depth (T20), respectively. In order to choose the best position of the lateral, the results of different simulation run, carried out by choosing a deeper installation (T45) depth. Simulated SWC’s resulted fairly close to the corresponding measured at different distances from the emitter and therefore the model was able to predict SWC’s in the root zone with values of the Root Mean Square Error generally lower than 4%. This result is consequent to the appropriate schematization of the root distribution, as well as of the root water uptake. The values of WUE associated to the different examined installation depths tend to a very slight increase when the position of the lateral is situated on 20 cm and start to decrease for the higher depths
Optimizing subsurface dripline installation depth with Hydrus 2D/3D to improve irrigation water use efficiency in the central Tunisia
The main objective of the work is to optimize drip installation depth for Eggplant crop
irrigated with surface or subsurface drip irrigation systems to improve irrigation Water
Use Effeciency (WUE), by means of field measurements and simulations carried out with
Hydrus-2D model. Initially, a comparison between simulated Soil Water Contents (SWC) and
the corresponding measured in two plots, in which laterals with coextruded emitters are
laid on the soil surface (T0) and at 20 cm depth (T20), respectively. In order to choose
the best position of the lateral, the results of different simulation run, carried out by
choosing a deeper installation (T45) depth. Simulated SWC’s resulted fairly close to the
corresponding measured at different distances from the emitter and therefore the model was
able to predict SWC’s in the root zone with values of the Root Mean Square Error generally
lower than 4%. This result is consequent to the appropriate schematization of the root
distribution, as well as of the root water uptake. The values of WUE associated to the
different examined installation depths tend to a very slight increase when the position of
the lateral is situated on 20 cm and start to decrease for the higher depths
Optimizing subsurface dripline installation depth with Hydrus 2D/3D to improve irrigation water use efficiency in the central Tunisia
The main objective of the work is to optimize drip installation depth for Eggplant crop
irrigated with surface or subsurface drip irrigation systems to improve irrigation Water
Use Effeciency (WUE), by means of field measurements and simulations carried out with
Hydrus-2D model. Initially, a comparison between simulated Soil Water Contents (SWC) and
the corresponding measured in two plots, in which laterals with coextruded emitters are
laid on the soil surface (T0) and at 20 cm depth (T20), respectively. In order to choose
the best position of the lateral, the results of different simulation run, carried out by
choosing a deeper installation (T45) depth. Simulated SWC’s resulted fairly close to the
corresponding measured at different distances from the emitter and therefore the model was
able to predict SWC’s in the root zone with values of the Root Mean Square Error generally
lower than 4%. This result is consequent to the appropriate schematization of the root
distribution, as well as of the root water uptake. The values of WUE associated to the
different examined installation depths tend to a very slight increase when the position of
the lateral is situated on 20 cm and start to decrease for the higher depths