Spatial and temporal distribution of seasonal drought in hilly area of central Sichuan in recent 50 years
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
In recent years, seasonal droughts occur frequently in the hilly area of central Sichuan, resulting in serious impacts on the agricultural production in Sichuan. According to the daily meteorological data of eight meteorological stations from 1960 to 2011 in this area, the relative humidity index in the national standards was selected as the drought index, and linear trend meth2 od, Morlet wavelet, and inverse distance weighting interpolation method were used to investigate the spatial and temporal distri 2 bution of seasonal drought frequency and intensity. The results indicated that ( 1) drought frequency and intensity have large differences in different seasons, and they are significantly higher in spring and winter than those in summer and autumn, and drought occurs mainly in spring and winter; (2) on the temporal distribution, drought in spring and autumn tends to be worse while drought in summer and winter alleviates. Drought in spring has three cycle evolutions while drought in winter has 2 cycle evolutions; and ( 3) on the spatial distribution, the central hilly area of central Sichuan has high incidence of drought in spring and summer, while the northern hilly area of central Sichuan has the high incidence of drought in autumn and winter. This study can provide a theoretical basis for the drought control and mitigation measures in the hilly area of central Sichuan.
Keywords:
Project Supported:
Clc Number:
Mobile website
® 2024 All Rights Reserved
冀公网安备13010502002656号
冀公网安备13010502002656号