Bayesian logistic regression analysis for spatial patterns of inter-seasonal drought persistence Show others and affiliations
2023 (English) In: Geocarto International, ISSN 1010-6049, E-ISSN 1752-0762, Vol. 38, no 1, article id 2211041Article in journal (Refereed) Published
Abstract [en]
Drought is one of the disastrous natural hazards with complex seasonal and spatial patterns. Understanding the spatial patterns of drought and predicting the likelihood of inter-seasonal drought persistence can provide substantial operational guidelines for water resource management and agricultural production. This study examines drought persistence by identifying the spatial patterns of seasonal drought frequency and inter-seasonal drought persistence in the northeastern region of Pakistan. The Standardized Precipitation Index (SPI) with a three-month time scale is used to examine meteorological drought. Furthermore, Bayesian logistic regression is used to calculate the probability and odds ratios of drought occurrence in the current season, given the previous season's SPI values. For instance, at Balakot station, for the summer-to-autumn season, the value of the odds ratio is significant (6.78). It shows that one unit increase in SPI of the summer season will cause a 5.78 times to increase in odds of autumn drought occurrence. The average drought frequency varies from 37.3 to 89.1%, whereas the average inter-seasonal drought persistence varies from 21.9 to 91.7% in the study region. Results indicate that some areas in the study region, like Kakul and Garhi Dupatta, are more prone to drought and vulnerable to inter-seasonal drought persistence. Furthermore, the Bayesian logistic regression results reveal a negative relationship between spring drought occurrence and winter SPI, demonstrating that the overall study region is more prone to winter-to-spring drought persistence and less vulnerable to summer-to-autumn drought persistence. Overall study has concluded that the region's seasonal drought forecast is challenging due to uncertain drought persistence patterns. However, the Bayesian logistic regression model provides more accurate and precise regional seasonal drought forecasts. The outcome of the present study provides scientific evidence to develop early warning systems and manage seasonal crops in Pakistan.
Place, publisher, year, edition, pages Taylor & Francis, 2023. Vol. 38, no 1, article id 2211041
Keywords [en]
Bayesian logistic regression, drought persistence, Gibbs sampling, inter-seasonal, standardized precipitation index
National Category
Earth and Related Environmental Sciences Probability Theory and Statistics
Identifiers URN: urn:nbn:se:hj:diva-60981 DOI: 10.1080/10106049.2023.2211041 ISI: 000993253300001 Scopus ID: 2-s2.0-85160665754 Local ID: HOA;intsam;884747 OAI: oai:DiVA.org:hj-60981 DiVA, id: diva2:1765077
2023-06-092023-06-092025-01-31 Bibliographically approved