Journal of the Japanese Society of Soil Physics

Journal of the Japanese Society of Soil Physics

Online ISSN : 2435-2497
Print ISSN : 0387-6012

Search

OR

Browse

Search

Search
Browse

All issues

Volume 146

Displaying 1-10 of 10 articles from this issue

Download citation

Show all abstracts

|<
<
1
>
>|

[title in Japanese]

Yasushi MORI

2020 Volume 146 Pages 1-2
Published: 2020
Released on J-STAGE: January 12, 2021

DOIhttps://doi.org/10.34467/jssoilphysics.146.0_1

JOURNAL FREE ACCESS

Download PDF (495K)
Simulation of soil water & heat transport in a vegetated field using a coupled program of the canopy energy budget model and HYDRUS-1D

Investigation of partitioning evapotranspiration in a soybean field

Masaru SAKAI, Yuna TAKAHASHI, Atsushi MARUYAMA

2020 Volume 146 Pages 3-16
Published: 2020
Released on J-STAGE: January 12, 2021

DOIhttps://doi.org/10.34467/jssoilphysics.146.0_3

JOURNAL FREE ACCESS

Show abstractHide abstract

Evapotranspiration plays an important role to investigate simultaneous movement of water and heat in a vegetated field. To simulate changes of soil water content and soil temperature using the Richards equation with root water uptake, partitioning potential evapotranspiration, Ep, into potential soil surface evaporation, Egp, and crop transpiration, Ecp, is necessary. The double source model, one of the canopy energy budget models calculating energy balances at both canopy and soil surface, is a promising model to calculate evaporation rate, Eg, and transpiration rate Ec, separately. In this study, we developed a numerical model to simulate water movement and heat transport in the root zone by implementing the double source model in HYDRUS-1D. Field observation was also carried out in a soybean field to test the developed model. Simulated soil water contents and temperatures using various values of radiation transmissivity, τ, were compared with observed data during relatively wet condition. It was indicated that determining τ based on observed surface coverage, Sc (i.e., τ = 1 - Sc) can be a reasonable method to partition Ep to Egp and Ecp with considering crop growth. Simulation for a longer drying period was also carried out to show changes of Eg, Ec, and energy balance components at both canopy and soil surface. Eg decreased more rapidly than Ec, resulting in increase of soil temperature amplitude due to increased soil heat flux. Agreements between simulated soil water contents and temperatures and observed ones improved by accounting for the compensated root water uptake and larger unsaturated hydraulic conductivity for drier range, due to increasing root water uptakes and evaporation rates. For proper evaluation of the ratio of Eg and Ec in dry period, detail investigations for soil hydraulic property and root water uptake property are needed.

View full abstract

Download PDF (1315K)
[title in Japanese]

HIROTAKA SAITO

2020 Volume 146 Pages 17
Published: 2020
Released on J-STAGE: January 12, 2021

DOIhttps://doi.org/10.34467/jssoilphysics.146.0_17

JOURNAL FREE ACCESS

Download PDF (416K)
[title in Japanese]

HIROTAKA SAITO, Shoichiro HAMAMOTO, Yuki KOJIMA, Yasushi MORI

2020 Volume 146 Pages 19-21
Published: 2020
Released on J-STAGE: January 12, 2021

DOIhttps://doi.org/10.34467/jssoilphysics.146.0_19

JOURNAL FREE ACCESS

Download PDF (496K)
[title in Japanese]

Kosuke NOBORIO, Yasushi MORI

2020 Volume 146 Pages 23-25
Published: 2020
Released on J-STAGE: January 12, 2021

DOIhttps://doi.org/10.34467/jssoilphysics.146.0_23

JOURNAL FREE ACCESS

Download PDF (1280K)
[title in Japanese]

Masahiro KOBAYASHI

2020 Volume 146 Pages 27-29
Published: 2020
Released on J-STAGE: January 12, 2021

DOIhttps://doi.org/10.34467/jssoilphysics.146.0_27

JOURNAL FREE ACCESS

Download PDF (488K)
[title in Japanese]

Taku NISHIMURA, Kosuke NOBORIO, Masaru MIZOGUCHI

2020 Volume 146 Pages 31-32
Published: 2020
Released on J-STAGE: January 12, 2021

DOIhttps://doi.org/10.34467/jssoilphysics.146.0_31

JOURNAL FREE ACCESS

Download PDF (469K)
Duty of Science Council of Japan

Shuichi HASEGAWA, Tatsuaki KASUBUCHI, Tsuyoshi MIYAZAKI

2020 Volume 146 Pages 33-34
Published: 2020
Released on J-STAGE: January 12, 2021

DOIhttps://doi.org/10.34467/jssoilphysics.146.0_33

JOURNAL FREE ACCESS

Download PDF (458K)
[title in Japanese]

Shuji SANO

2020 Volume 146 Pages 35-37
Published: 2020
Released on J-STAGE: January 12, 2021

DOIhttps://doi.org/10.34467/jssoilphysics.146.0_35

JOURNAL FREE ACCESS

Download PDF (790K)
[title in Japanese]

Yohei HASHIMOTO

2020 Volume 146 Pages 43
Published: 2020
Released on J-STAGE: January 12, 2021

DOIhttps://doi.org/10.34467/jssoilphysics.146.0_43

JOURNAL FREE ACCESS

Download PDF (163K)

|<
<
1
>
>|

Top