INTERNATIONAL JOURNAL OF AGRICULTURAL TECHNOLOGY

Volume 16, No. 03, Month MAY, Year 2020, Pages 655 - 666

Drought risk area assessment using gis in sa kaeo province, thailand

Noichaisin, L., Buranapratheprat, A., Manthachitra, V. and Intarawichian, N.

Abstract Download PDF

Geographic Information System (GIS) model was used to assess drought risk area in Sa Kaeo Province, Thailand. Results indicated that total area of low, moderate, high, and very high drought risk were 103,394 m2 (1.44%), 3,482,673.76 m2 (48.40%), 3,406,193.74 m2 (47.34%) and 203,174.31 m2 (2.82%), respectively. The historical drought information and field surveys were compared to evaluate the accuracy of model prediction, which was 77.35%. Relationships between studied environmental factors and the drought risk were examined, and the results showed both positive and negative correlations. The factors expressing significant positive correlations with drought risk from high to low were distanced from irrigation area, volume of groundwater, slope, soil drainage, distance from water sources and land use with Pearson correlation coefficients of 0.743, 0.534, 0.510, 0.476 and 0.265, respectively. Meanwhile, the averaged annual rainfall was a negative correlation with drought risk, with Pearson coefficient of -0.853. The results can be used as information for the local administration to help alleviate the effects of continued drought in Sa Kaeo Province.

Keywords

Drought risk, Geographic Information System, Sa Kaeo Province

---