Spatial-temporal characteristics and hazard risks of meteorological drought in Circum-Bohai-Sea region from 1961 to 2017

Xiaoli, 王晓利 Wang; Chunyan, 张春艳 Zhang; Xiyong, 侯西勇 Hou

doi:10.5846/stxb201806151335

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…., 2014); I g is the multi-year mean value of the drought intensity in the study area; N y is the total number of years; N m is the months in the study period (Ny*12); S y is the cumulative value of the SRIs in the study period; and S i is the value of the SRI in month i. 2019) pointed out that regional drought hazards are closely related to the drought occurrence frequency and drought intensity [42,43]. This study proposes a hydrological drought hazard index based on the frequency of hydrological drought and the intensity of hydrological drought.…”

Section: Drought Frequency Coverage and Intensitymentioning

confidence: 99%

Spatiotemporal Changes and Hazard Assessment of Hydrological Drought in China Using Big Data

Tao,

Meng,

Huang

2023

Water

View full text Add to dashboard Cite

The intensification of the regional water cycle resulting from climate change, coupled with the influence of human activities, has brought about alterations in the frequency, scale, and intensity of droughts. In this study, based on hydrological big data and the standardized runoff drought index (SRI), the multi-scale spatiotemporal evolution of hydrological drought in China from 1948 to 2014 was analyzed using the run-length theory and gravity center model. Meanwhile, the hydrological drought hazard index was constructed to analyze the distribution of the hazard levels of drought in China. The results showed that, during 1948~2014, there was an opposite spatial distribution between the average intensity and the average coverage–duration–frequency of drought in the Yellow River Basin, Haihe River Basin and southeastern river basins. The drought situation in most river basins in China has shown an aggravating trend, among which the southeastern river basins, Haihe River Basin, Songliao River Basin and Pearl River Basin have generally shown an aggravating trend. The drought situation in China was severe in the 1950s and 1960s, gradually reduced in the 1970s, 1980s, and 1990s, and the drought situation was the mildest in the 1990s. After entering the 21st century, the drought situation began to worsen sharply. Meanwhile, from 1948 to 2014, the hazard level of drought generally presented a pattern of high in the west and north, and low in the east and south. The hazard levels of drought in the northwest and northeast were generally higher, and those in the southwest and southeast regions were generally lower. In general, the hazard levels of drought were relatively high in most areas of China.

show abstract

Section: Drought Frequency Coverage and Intensitymentioning

confidence: 99%