| Author | Gill, Jagvijay Pratap Singh |
| Call Number | AIT Thesis no.RS-07-13 |
| Subject(s) | Soil moisture--Simulation methods--Thailand
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| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Science in Remote Sensing and Geographic Information System |
| Publisher | Asian Institute of Technology |
| Abstract | Soil moisture is an important parameter in many applications. Estimation of soil moisture at high temporal scale can be carried out by use of simulation models. A field scale agro-hydrological model (SWAP) was used in this study to simulate soil moisture on daily basis. Two agro-meteorological stations were developed in Ubon Ratchathani province of Thailand. The stations were located at 15° 42' N - 105° 0.39' E and 14° 58' N - 105°11 'E respectively. The stations comprised of multiple sensors and instruments to record data for every thirty second. Meteorological and hydrological nature of the data such as wet and dry air temperatures at 2m and 10m, ground temperatures at - 2cm, -4cm, -12cm, -28cm and -60cm , soil moisture at -3cm, -12cm,-28cm, and - 60cm, wind speed at 2m and 10m, soil heat flux, net radiation, , rainfall, and solar radiation was generated. Appropriate calibration procedures were performed before the deployment of sensors in the field. Laboratory experiments such as sieve analysis and hydrometer tests were conducted to find the soil texture and soil hydraulic properties from the field sampled soils at four different depths below the surface. The data gathered was averaged on daily basis to create SWAP input parameters. Missing data was interpolated wherever appropriate and the erroneous values were removed. The derived information from the station was used as input to SWAP model for simulating soil moisture. Soil moisture was simulated for two months period starting from 26 February to 26 April. The simulated results were compared with the field soil moisture collected through sensors. The comparison between the two results showed some correspondence of absolute values and tendencies in change in moisture. More accurate estimation soil hydraulic properties and true initial soil moisture condition for better simulation results was recommended. |
| Year | 2007 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Remote Sensing (RS) |
| Chairperson(s) | Honda, Kiyoshi; |
| Examination Committee(s) | Babel, Mukand Singh;Surat Lertlum; |
| Scholarship Donor(s) | AIT fellowship; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2007 |