2013 Fiscal Year Final Research Report
Time domain transmissiometry (TDT) for measuring soil moisture and electrical conductivity
| Project/Area Number |
23780251
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Saga University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Keywords | 時間領域透過法(TDT) / 土壌水分量 / バルク電気伝導度 / モニタリング / マイクロ波 |
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| Research Abstract |
To establish a method to determine soil moisture and bulk soil electrical conductivity (EC) using Time domain transmissiometory (TDT), we investigated the dielectric properties of soils in wide microwave frequency and performed calibration experiments using a TDT system we designed. We also developed a low-cost TDT system and verified its performance. While the system performed very well in moderately conductive soils, limitations for highly conductive soils as well as for soils with less conductive soils. An empirical relationship between the maximum slope of the TDT waveform and the bulk EC was developed to improve measurement capabilities in the soils.
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