A multiple-rod TDR probe development with a view to measure water content and electrical conductivity(EC) of surface soil.

• Project/Area Number: 21580299
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Irrigation, drainage and rural engineering/Rural planning
• Research Institution: Saga University
• Principal Investigator: CHO Hiroyuki 佐賀大学, 農学部, 教授 (90136599)
• Co-Investigator(Kenkyū-buntansha): MIYAMOTO Hideki 佐賀大学, 農学部, 准教授 (10423584)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 土壌圏現象 / モニタリング / 水循環 / 農業工学

Research Abstract

A multiple-rod TDR probe was developed with a view to measure water content and electrical conductivity(EC) of surface soil. The probe consisted of several three-rod probes in which the outer rods of each three-rod probe were the common electrical earth guides for the adjacent probes. There was thus no extra space between the adjacent three-rod probes. This probe configuration enabled the TDR measurement to extend over a large area in the field. The characteristics of the multiple-rod probe were examined in sand in a container of 1. 1m×0. 81m×0. 20m. First, a one unit of probe consisting of three 1-m long steel rods of 0. 5 cm diameter with a spacing of 10 cm between the rods was tested for its detective performance for water and EC in sand. Then, a multiple-rod probe consisting of seven rods and with the same probe specifications was inserted horizontally in the sand of the container at 10 cm below the surface. The dielectric constant and EC of the sand were measured with during an evaporation test. Since TDR measurement depended on the air volume in the sampling volume of a probe, the unit probe test revealed the dependency of dielectric constant on the insertion depth of the probe. A cubic expression, such as the Topp' s one, provided a good relation between the average water content and dielectric constant of the surface soil. The insertion depth did not however affect the EC measurement. Moreover, the multiple-rod probe, through the evaporation test, accurately measured the change in water content and EC over 0. 88 m^2 in the surface region. Our results thus showed the possibility of extending the multiple-rod TDR measurement system to a larger area to make the remote sensing data more accurate.

Research Products

• [Journal Article] Effect of water content and temperature on the surface conductivity of bentonite clay (2012)
  • Author(s): M.A.Mojid, H.Cho
  • Journal Title: Soil Research, CSIRO Volume: 50 Pages: 44-49
  • Peer Reviewed
• [Journal Article] 中国黄河上流域の乾燥地域に位置するトウモロコシ畑圃場に関する土壌水分移動解析 (2011)
  • Author(s): 田川堅太, 長裕幸, 小林哲夫, 森, 牧人, 王維真
  • Journal Title: 佐賀大学農学部彙報 Volume: 第96号 Pages: 1-13
• [Journal Article] マイクロ波を利用した淡水の水位・電気伝導度および淡塩水境界位の計測システム (2011)
  • Author(s): 伊藤祐二, 郡山益実, 宮本英揮, 梅谷知弘, 筑紫二郎
  • Journal Title: 水文・水資源学会誌 Volume: 24(3) Pages: 170-176
  • NAID: 10028224567
  • Peer Reviewed
• [Journal Article] Saline water seepage from drainage canals induces soil salinization and growth depression in the adjacent cornfields in the Upper Yellow River basin (2011)
  • Author(s): Araki, T., 他7名7番目
  • Journal Title: Environment Control in Biology Volume: 49 Pages: 127-132
  • Peer Reviewed
• [Journal Article] Root Absorptive Functions Drive Salt Accumulation in Crop Fields under DesertificationIEffects of Leaf Transpiration and Soil Evaporation (2010)
  • Author(s): K. Ebihara, A. Marui, H. Cho(11名, 8番目)
  • Journal Title: Eco Engineering Volume: 22(3) Pages: 93-99
  • Peer Reviewed
• [Journal Article] Multi-TDR probe designed for measuring soil moisture distribution near the soil surface (2010)
  • Author(s): Y. Ito, J. Chikushi and H. Miyamoto
  • Journal Title: Proc. of 19th World congress of soil science, Brisbane, Australia
• [Journal Article] マクロベントスの生息環境調査のための底質観測手法の開発 (2010)
  • Author(s): 宮本英揮, 伊藤祐二, 梅谷知弘, 筑紫二郎
  • Journal Title: 水土の知(農業農村工学会誌) Volume: 78(5) Pages: 51-52
• [Journal Article] 生物環境調節学分野におけるECH_2Oプローブの適用事例 (2010)
  • Author(s): 伊藤祐二, 宮本英揮, 安永円理子, 江口壽彦, 筑紫二郎
  • Journal Title: 土壌の物理性 Volume: 114 Pages: 33-36
  • Peer Reviewed
• [Journal Article] マイクロ波のエネルギー吸収特性を利用した淡塩水境界面の計測 (2010)
  • Author(s): 伊藤祐二, 宮本英揮, 郡山益実, 筑紫二郎, 瀬口昌洋
  • Journal Title: 土木学会論文集B Volume: 66(2) Pages: 189-195
  • NAID: 130004468107
  • Peer Reviewed
• [Journal Article] マイクロ波を利用した沿岸帯水層の水質および淡水量の同時評価システムの開発 (2010)
  • Author(s): 伊藤祐二, 宮本英揮, 郡山益美, 梅谷知弘, 筑紫二郎
  • Journal Title: 水土の知(農業農村工学会誌) Volume: 78(5) Pages: 49-50
• [Journal Article] 気象変化が深い湖の湖面蒸発量,水温,熱収支に及ぼす影響-鹿児島県池田湖の事例- (2010)
  • Author(s): 伊藤祐二, 籾井和朗
  • Journal Title: 農業農村工学会論文集 Volume: 269 Pages: 93-103
  • Peer Reviewed
• [Journal Article] 乾燥土壌への散水に伴う浸潤の不安定化に関する研究 (2009)
  • Author(s): 長裕幸, 井上光弘
  • Journal Title: 土壌の物理性 Volume: 111 Pages: 53-60
  • NAID: 130008084868
  • Peer Reviewed
• [Journal Article] Identification of the composite parameters of the BBH-B model specifying the effects of biohydrologic processes on the water balance of crop fields (2009)
  • Author(s): T. Kobayashi, J. Teshima, M. Mori, H. Cho, (6名, 6番目)
  • Journal Title: Biologia Volume: 64/ 3 Pages: 478-482
  • Peer Reviewed
• [Journal Article] Water and salt movement in soil driven by crop roots : a controlled column study (2009)
  • Author(s): M. Kitano, K. Urayama, Y. Sakata, H. Cho, (11名, 10番目)
  • Journal Title: Biologia Volume: 64/ 3 Pages: 474-477
  • Peer Reviewed
• [Journal Article] Analysis of salts transport affected by root absorption capacity in surface. irrigated fields in the upper Yellow River basin (2009)
  • Author(s): D. Yasutake, T. Araki, W. Wang, H. Cho, (7名, 5番目)
  • Journal Title: Biologia Volume: 64 Pages: 570-574
  • Peer Reviewed
• [Journal Article] 時間領域反射法による水中の堆積土砂表面位および電気伝導度の同時計測 (2009)
  • Author(s): 伊藤祐二, 宮本英揮, 筑紫二郎
  • Journal Title: 農業農村工学会論文集 Volume: 263 Pages: 81-90
  • NAID: 10025641869
  • Peer Reviewed
• [Journal Article] 時間領域反射法による水中堆積土砂表面位の評価法 (2009)
  • Author(s): 伊藤祐二, 宮本英揮, 筑紫二郎
  • Journal Title: 農業農村工学会論文集 Volume: 262 Pages: 75-81
  • NAID: 10025641638
  • Peer Reviewed
• [Journal Article] 種々の電気伝導度条件に対する静電容量式土壌水分センサーの校正モデル (2009)
  • Author(s): 宮本英揮, 長裕幸, 伊藤祐二, 筑紫二郎, 江口壽彦
  • Journal Title: 植物環境工学 Volume: 21(2) Pages: 86-91
  • NAID: 10024918316
  • Peer Reviewed
• [Journal Article] 水分移動特性に基づく有機・無機培地内水分環境の評価 (2009)
  • Author(s): 宮本英揮, 吉田敏, 筑紫二郎, 江口壽彦, 伊藤祐二
  • Journal Title: 植物環境工学 Volume: 21(2) Pages: 72-78
  • NAID: 10024918261
  • Peer Reviewed
• [Journal Article] 固形培地耕装置における地下水位がニンジン生育に与える影響 (2009)
  • Author(s): 江口壽彦, 鈴木健彦, 宮本英揮, (7名, 3番目)
  • Journal Title: 植物環境工学 Volume: 21(2) Pages: 65-71
  • Peer Reviewed
• [Journal Article] Coupled measurements of water content and electrical conductivity in dielectrically lossy clay slurry using a coated TDR probe, H. Miyamoto (2009)
  • Author(s): J. Chikushi, and M. Kanayama
  • Journal Title: Soils and Foundations Volume: 49(2) Pages: 175-180
  • Peer Reviewed
• [Journal Article] TDRによる表層土壌水分計の開発とその有効性の評価 (2009)
  • Author(s): 伊藤祐二, 筑紫二郎, 宮本英揮
  • Journal Title: 土壌の物理性 Volume: 111 Pages: 35-41
  • NAID: 130008084865
  • Peer Reviewed
• [Journal Article] 乾燥土壌への散水に伴う浸潤の不安定化に関する研究 (2009)
  • Author(s): 長裕幸
  • Journal Title: 土壌の物理性 111 Pages: 53-60
  • NAID: 130008084868
  • Peer Reviewed
• [Journal Article] 種々の電気伝導度条件に対する静電容量式土壌水分センサーの校正モデル (2009)
  • Author(s): 宮本英揮
  • Journal Title: 植物環境工学 21 Pages: 86-91
  • NAID: 10024918316
  • Peer Reviewed
• [Presentation] Two dimensional measurement of water content and electrical conductivity of surface soil with a multiple-rod TDR probe (2011)
  • Author(s): Hiroyuki Cho, 他4名1番目
  • Organizer: Annual meeting of Soil Science Society of America
  • Place of Presentation: San Antonio TX., U.S.A.
  • Year and Date: 2011-10-14
• [Presentation] 大型多線式TDRプローブによる面的土壌水分計測 (2011)
  • Author(s): 児玉大輔, 長裕幸
  • Organizer: 農業農村工学会
  • Place of Presentation: 福岡市
  • Year and Date: 2011-09-06
• [Presentation] Analysis of soil-water movement in a maize field in the arid region of China (2011)
  • Author(s): Kenta Tagawa, Hiroyuki Cho, Masaharu Kitano, Weizhen Wang
  • Organizer: Annual meeting of Soil Science Society of America
  • Place of Presentation: San Antonio TX., U. S. A.
• [Presentation] Two dimensional measurement of water content and electrical conductivity of surface soil with a multiple-rod TDR probe (2011)
  • Author(s): Hiroyuki Cho, Mitsuhiro Inoue, Daisuke Kodama, Kenta Tagawa, Hideki Miyamoto
  • Organizer: Annual meeting of Soil Science Society of America
  • Place of Presentation: San Antonio TX., U. S. A.
• [Presentation] 大型多線式TDRプローブによる面的土壌水分計測 (2011)
  • Author(s): 児玉大輔, 長裕幸, 宮本英揮, 田川堅太, 井上光弘
  • Organizer: 農業農村工学会
  • Place of Presentation: 福岡
• [Presentation] 圃場の実蒸発散量の推定による土中水分移動モデルの検証 (2011)
  • Author(s): 田川堅太, 長裕幸
  • Organizer: 農業農村工学会
  • Place of Presentation: 福岡
• [Presentation] 土壌の塩類化に及ぼす蒸発散と植物のイオン吸収の影響 (2011)
  • Author(s): 阪本大輔, 高田元気, 野見山綾介, 海老原健二, 佐合悠貴, 安武大輔, 荒木卓哉, 長裕幸, 小林哲夫, 大槻恭一, 北野雅治
  • Organizer: 日本農業気象学会2011年大会
  • Place of Presentation: 鹿児島市
• [Presentation] Sustainable control of soil salinity in irrigated crop fields under desertification. 1. Seasonal change in soil salinity of a field in the Yellow River basin (2011)
  • Author(s): Yasutake, D., Kitano, M., Mori, M., Cho, H., Araki, T., Kobayashi, T. and Wang, W.
  • Organizer: CIGR 2011
  • Place of Presentation: Tokyo
• [Presentation] Sustainable control of soil salinity in irrigated crop fields under desertification. 2. Salt transport driven by roots and proposal for salinity control technologies (2011)
  • Author(s): Kitano, M., Ebihara, K., Takata, M., Sakamoto, D., Sago, Y., Yasutake, D., Mori, M., Cho, H., Araki, T., Kobayashi, T., Wang, W., Wu, Y., Ma, Y., Yamanaka, N. and Otsuki, K.
  • Organizer: CIGR 2011
  • Place of Presentation: Tokyo
• [Presentation] Sustainable plant production with salinity control in the upper Yellow River basin under desertification (2011)
  • Author(s): Wang, W., Wu, Y., Mori, M., Yasutake, D., Araki, T., Cho, H., Kobayashi, T. and Kitano, M.
  • Organizer: The 5^<th> International Symposium on the East Asia Environmental Problems EAEP 2011
  • Place of Presentation: Fukuoka
• [Presentation] Seasonal change in soil salinity of irrigated fields in the upper Yellow River basin (2011)
  • Author(s): Yasutake, D., Wang, W., Kobayashi, T., Wu, Y., Araki, T., Cho, H., Mori, M. and Kitano, M.
  • Organizer: The 5^<th> International Symposium on the East Asia Environmental Problems EAEP 2011
  • Place of Presentation: Fukuoka
• [Presentation] A kinetic model of root ion absorption integrated with evapotranspiration for estimating salt accumulation in crop fields (2011)
  • Author(s): Kitano, M., Ebihara, K., Rakata, M., Sakamoto, D., Sago, Y., Marui, A., Yasutake, D., Mori, M., Cho, H., Araki, T., Kobayashi, T., Wang, W., Wu, Y., Ma, Y., Yamanaka, N. and Otsuki, K.
  • Organizer: The 5^<th> International Symposium on the East Asia Environmental Problems EAEP 2011
  • Place of Presentation: Fukuoka
• [Presentation] Quantitative monitoring on soil salinization degree in the middle stream of Heihe River basin based on the TM image (2011)
  • Author(s): Wu, Y., Wang, W., Mori, M., Yasutake, D., Cho, H., Kobayashi, T. and Kitano, M.
  • Organizer: Proceedings of The 5^<th> International Symposium on the East Asia Environmental Problems EAEP 2011
  • Place of Presentation: Fukuoka
• [Presentation] Analysis of soil-water movement by using HYDRUS-1D in a maize field in the arid region of China (2011)
  • Author(s): Kenta Tagawa, Hiroyuki Cho, Masaharu Kitano, Weizhen Wang
  • Organizer: Proceedings of The 5th International Symposium on the East Asia Environmental Problems EAEP 2011
  • Place of Presentation: Fukuoka
• [Presentation] 面的土壌水分・電気伝導度測定のための大型多線式プローブの開発 (2010)
  • Author(s): 長裕幸
  • Organizer: 農業・農村工学会
  • Place of Presentation: 神戸大学
  • Year and Date: 2010-08-31
• [Presentation] 2成層湛水降下浸潤における浸潤前線の不安定化に関する研究 (2009)
  • Author(s): 長裕幸
  • Organizer: 農業・農村工学会
  • Place of Presentation: つくば大学
  • Year and Date: 2009-08-04
• [Presentation] Estimation of evaporation for analyzing the water balance of a field in the Yellow River basin
  • Author(s): Mori, M., Wang, W., Kobayashi, T., Cho, H., Yoshikoshi, H., Wu, Y., Yasutake, D. and Kitano, M.
  • Organizer: during a dormant season
  • Place of Presentation: China
• [Book] Yellow River-water and life- (2010)
  • Author(s): H. Cho(共著), edited by T. Kusuda
  • Publisher: World Scientific Publishing Co
• [Book] Biohydrology of Farmland under Desertification (2010)
  • Author(s): H. Cho(共著), Edited by T. Kobayashi and M. Kitano
  • Publisher: SPM & Water Press