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Spatial and Temporal Distribution of Water Requirement by Major Crops in Chainat Province, Thailand |
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| รหัสดีโอไอ | |
| Creator | Jutaporn Keson |
| Title | Spatial and Temporal Distribution of Water Requirement by Major Crops in Chainat Province, Thailand |
| Contributor | Thapat Silalertruksa1, Shabbir H. Gheewala |
| Publisher | Environmental Engineering Association of Thailand |
| Publication Year | 2564 |
| Journal Title | Thai Environmental Engineering Journal (TEEJ) |
| Journal Vol. | 35 |
| Journal No. | 3 |
| Page no. | 41-49 |
| Keyword | Spatial data, Water requirement, Agriculture, Water shortage, Geographic Information System |
| URL Website | https://so05.tci-thaijo.org/index.php/teej |
| Website title | Thai Environmental Engineering Journal (TEEJ) |
| ISSN | 2673-0359 |
| Abstract | Water plays an important role in supporting agriculture. Accurate assessment of water requirements in terms of time, quantity, and space iscritical for agriculture and food production sustainability. The objective of this study was to assess the spatial and temporal distribution of water requirementsfor major crops in Chainat Province, Thailand and identify the water shortage hotspots using a geographic information system (GIS). The spatial model was used to identify the crops plantation. Land use is divided into eightcategories: rice, sugarcane,cassava,other agriculture, urban and built-up, forest, water bodies, and other lands. The result shows that the main land use in 2019 is for agriculture, accounting for about 85% of the total area. The main crops are rice,sugarcane,and cassava, accounting for 59%, 14%, and 8% of the total area, respectively. The model calculated the water requirementsfor thosethreemain crops using the crop evapotranspiration, monthly climate data,and the existingwater irrigation areas. The results were presented in a grid cell map of monthly crop water demand. The average water requirementsof rice,sugarcane,and cassava are9,675,10,577 and 7,979m3/ha, respectively. The water deficit areas for rice cultivation were Nong Mamong, Wat Sing, Hankha, and Wat Singdistricts duringFebruary to March. In July, Noen Kham was found as the water deficitarea for cassava and sugarcane cultivation. For the irrigation water requirementper year, rice requires around 5,612 m3/ha/two crop cycles, followed by sugarcane at about 4,322 m3/ha/crop cycle and cassava around 2,186 m3/ha/crop cycle. The substitution of rice cultivation by sugarcane or cassava in the water deficit areas could save water resources by about1,289and 3,426 m3/ha, respectively. |
