Abstract
Detecting the characteristics and variability of droughts is of crucial importance. In this study, Guizhou Province in China is selected as the target area, and the dataset there covering daily precipitation and drought records from 1960 to 2016 is adopted. The spatial and temporal differences in yearly and seasonal Dnp (the drought indicator of continuous days without available precipitation) values and longest Dnp as well as their trends are examined. Then the Dnp values and droughts are classified into different categories, and the relationships between Dnp and droughts are revealed. There was a steep increasing trend in yearly Dnp with a rate of 6 d/10a, and the Mann–Kendall (MK) value was estimated to be 5.05 in the past 56 years. The seasonal Dnp values showed significant increasing trends. Yearly and seasonal Dnp varied significantly in the space domain. There were slight increases in yearly and four seasonal longest Dnp values in the time domain. Although the increases in the spring and summer were not significant, heavy droughts tended to occur at this time. As to the Dnp values corresponding to different levels of droughts, there was only a decrease in mild drought, while there were significant increases in mild, moderate, and heavy droughts. The mild droughts increased significantly in summer, and the moderate droughts increased significantly in spring. Different levels of Dnp also varied in the spatial domain. The elevation effect is not obvious in Guizhou province.
Highlights
Introduction published maps and institutional affilUnder a changing climate, both the frequency and intensity of extreme weather events are increasing substantially worldwide, posing high risks to people’s safety and social sustainability
There was a sharp increase in yearly days with- in available water precipitation (Dnp) with a rate of 6 d/10a during the past 60 years
A daily rainfall database during 1960–2016 from 19 rain gauges stations has been compiled for Guizhou province in Southwest China
Summary
Introduction published maps and institutional affilUnder a changing climate, both the frequency and intensity of extreme weather events are increasing substantially worldwide, posing high risks to people’s safety and social sustainability. It may even force people to temporarily reduce dependency on local resources or to relocate to a different location [3,4] It has been receiving world-wide attention, and much research has been conducted on droughts from different continents [5,6,7,8,9,10], including basic scientific research [11], drought identification [12], drought indicators [13,14], drought monitoring [13], drought planning, and prediction and mitigation [15], as well as studies on how to mitigate drought [16] and assessment [17]. It has been receiving world-wide attention, and much research has been conducted on droughts from different continents [5,6,7,8,9,10], including basic scientific research [11], drought identification [12], drought indicators [13,14], drought monitoring [13], drought planning, and prediction and mitigation [15], as well as studies on how to mitigate drought [16] and assessment [17]. iations.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
