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Application of moisture data from SMAP satellites to monitor soil salinity changes in salt-affected areas |
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| รหัสดีโอไอ | |
| Creator | Napaporn Phankamolsil |
| Title | Application of moisture data from SMAP satellites to monitor soil salinity changes in salt-affected areas |
| Contributor | Kriangkrai Juchoie, Kiattisak Sonsri, Yutthana Phankamolsil, Tawatchai Inboonchuay, Sirinapa Chungopast |
| Publisher | Faculty of Agriculture |
| Publication Year | 2567 |
| Journal Title | Khon Kaen Agriculture Journal |
| Journal Vol. | 52 |
| Journal No. | 6 |
| Page no. | 1242-1255 |
| Keyword | salt-affected soils, soil moisture, SMAP satellite |
| URL Website | https://li01.tci-thaijo.org/index.php/agkasetkaj |
| Website title | Khon Kaen Agriculture Journal |
| ISSN | 3027-6497 (Online) |
| Abstract | Soil moisture usually relates to soil salinity levels in areas affected by salts. Presently, soil moisture data measured by satellites are widely used. Thus, the objectives of this research were to 1) find the relationship between the directly measured soil moisture and soil moisture obtained from SMAP satellite, 2) observe the relationship between the soil moisture obtained from two methods and soil salinity variability, and 3) apply the soil moisture values obtained from SMAP satellite to assess soil salinity. Four study locations were conducted in Kasetsart University, Kamphaeng Saen Campus where they were affected by salt. Soil samples at the depth of 0โ"10 centimeters were collected in triplicate every 7 days between November 2022 and February 2023, in a total of 16 times. The results found that directly obtained soil moisture values ranged from 6.04โ"27.94% and soil moisture obtained from SMAP satellite ranged from 19.95โ"32.31%. The moisture values varied according to rainfall in the area. The electrical conductivity values ranged from 30.3โ"125.7 dS/m, indicating that all study locations had salinity values exceeding standards, which could be classified as salt-affected soils during the study period. When soil moisture value increased, electrical conductivity value decreased resulting in the negative relationship in linear equation between directly obtained soil moisture value and electrical conductivity value, with Rยฒ value (P < 0.01) of 0.4773 (Point 1), 0.7345 (Point 2), 0.6821 (Point 3), 0.8564 (Point 4) and that between soil moisture values obtained from the SMAP satellite and electrical conductivity with Rยฒ value (P < 0.01) of 0.8779 (Point 1), 0.8222 (Point 2), 0.6204 (Point 3), 0.7471 (Point 4). These findings suggest the possible utilization of soil moisture data from SMAP satellites instead of moisture data obtained directly from soil sampling in the field to quickly monitor the changes in soil salinity using an equation of X-11.12=Y (X=soil moisture measured by satellite and Y=soil moisture measured directly). |
