Evaluation of Subsurface Drip Irrigation Designs in a Soil Profile with a Capillary Barrier
Round 1
Reviewer 1 Report
This study investigated the performance of the subsurface drip irrigation in a soil profile with a capillary barriers. A pot experiment was carried out to obtain the soil moisutre data, which was then used to calibrate the HYDRUS model for numerical analysis. The topic is interesting to general research readers. There are some major concerns about the model setup and the model calibration needed to be impoved before publication.
(1) since I did not find any plant in the experiment pot as shown in Fig. 1, why did the author calculate the root uptake as mentioned in section 2.3.1?
(2) Did the author consider the evapotraspiraton in the upper boundary? How did you set the ET rate?
(3) In fig. 4, there was a large deviation between the simulated and observed results in S6, it seems that the model calibration part should be improved to increase accuracy.
(4) In line 348-351, the author mentioned that CB depth and the ring-shaped emitter depth influenced the amout of water lost by evaporation. Please provide more details and data about it and explain the reason.
(5) Please provide the 2-d soil water distribution profiles simulated by the model under differnt scenarios for clearly understand the water dynamics with a CB under SDI.
(6) The conclusion part should be added.
Author Response
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Author Response File: Author Response.docx
Reviewer 2 Report
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Comments for author File: Comments.pdf
Author Response
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Author Response File: Author Response.docx