Assessing crop water requirements for paddy crop using simplified surface energy balance approach in central Thailand | |
| Author | Kanoknun Muangsong |
| Call Number | AIT Thesis no.WM-20-06 |
| Subject(s) | Crops--Water requirements--Thailand Evapotranspiration--Thailand--Measurement Evapotranspiration--Remote sensing |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineeing in Water Engineering and Management |
| Publisher | Asian Institute of Technology |
| Abstract | This research provides the remote sensing approach in assessing Crop Water Requirement (CWR) from irrigation project such as Chongkhae Operation and Maintenance Project (Nakhon Sawan province), Manorom Operation and Maintenance Project (Chai Nat province), Khok Kathiam Operation and Maintenance Project (Lop Buri province) and Roeng Rang Operation and Maintenance Project (Phra Nakhon Si Ayutthaya province) in the Central of Thailand. The datas can be used to manage the amount of the irrigation water supply which is appropriate to cultivation of paddy field. Land Surface Temperature (LST) is important data for evaluating the variable energy balance. This parameter was used to estimate the hot- and cold-pixel. The ETf values during May are average 0.5-0.75, less than 0.5 during harvest. The ETf can explain the moisture in the region. During the wet season or agriculture, the ETf is higher, and then lower when entering to the dry season that corresponded to the LST because during May the moisture that obtained the water from irrigation. The reference evapotranspiration (ET0) from 4 weather stations showed a good agreement in comparison with IDAHO global dataset when interpolation the spatial resolution to 1000 m. based Penman-Monteith method. The graph provided R square aroung 0.9. ETa during 2015-2017 provided higher different data but presented a similar tendacy when compared between IDAHO and MODIS global datasets. It was found the lower in the non-irrigated areas. This is due to the difference in the ETf around these area. The ETf can besides indicated their soil-moisture. The result shows CWR divided to each Irrigation project during 2015-2017 within the study area in wet season (May to October). The higher CWR happens during May 2015 of all Irrigation project after that will decrease to lower values during October because of harvesting. There are maximum in May and minimum in October. However, CWR values in cultivation around irrigated area are higher than non-irrigated areas. However, irrigation efficiency(IE) indicated the ability of the irrigation system to deliver water from headwork to field. IE produced high values during May of all Irrigation project because there was sufficiency water that can diverted to the field. And IE will reduce during October because in this time used hardly amount of water. These outcomes suggest that it is important to consider for planning and management in the study area. |
| Year | 2020 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Sundaram S. Mohana; |
| Examination Committee(s) | Shrestha, Sangam;Sarawut Ninsawat; |
| Scholarship Donor(s) | Ministry of Agriculture and Cooperatives (MOAC), Thailand;AIT Fellowship ; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2020 |