1960—2014年广东省干旱时空演变特征

doi:10.13284/j.cnki.rddl.003236

Abstract

Abstract:

Drought has a serious impact on socio-economic development in China and around the world. This study used daily precipitation records from 24 meteorological stations in Guangdong Province, China from 1960 to 2014 to analyze the spatio-temporal characteristics of drought in that region based on the Equivalent Dry Period (EDP) metric converted from the Average Waiting Time for Precipitation index. Particular emphasis was placed on the spatio-temporal evolution of drought in the 21 ^stcentury. The results showed that the EDP index was suitable for analyzing drought characteristics in Guangdong Province. Overall, drought intensity decreased from east to west and from south to north, with coastal areas experiencing more severe drought than northern and western areas. During the study period, decadal variations and an annual increasing trend in EDP were obvious over the entire province. In addition, seasonal drought was prominent, occurring most frequently in autumn and winter, followed by spring; the drought’s central location varied from season to season. Drought frequency, intensity, and spatial extent were all higher in the early 21 ^stcentury than those in the late 20 ^th century. Specifically, since the turn of the century, both Dongyuan Station in the eastern Pearl River Delta and Luoding Station in western Guangdong showed significant increases in EDP and emerged as new drought hotspots. From a seasonal perspective, autumn and winter drought intensified most severely and tended to extend throughout Guangdong Province, with an EDP increase of 23% from the late 20th century to the early 21 ^st century. Spring drought worsened more gradually and summer drought occurred more frequently (though still rarely) in the early 21 ^stcentury. These results identified the spatial pattern and temporal evolution of drought in Guangdong Province since the turn of the century and provide scientific references and technical support for drought monitoring and mitigation in southeastern China.

Key words: drought evolution, AWTP index, EDP index, 21 ^stCentury, Guangdong

CLC Number:

K903

Wang Shuihan, Qiu Jianxiu, Wang Dagang. Spatio-Temporal Variation of Drought in Guangdong Province from 1960 to 2014[J].Tropical Geography, 2020, 40(2): 357-366.

Figures/Tables 10

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References 24

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站点名称	发生年份		站点名称	发生年份		站点名称	发生年份
站点名称	最大EDP	最小EDP	站点名称	最大EDP	最小EDP	站点名称	最大EDP	最小EDP
广州	2003	1972	湛江	1983	1972	韶关	2014	1970
增城	2004	1964	阳江	2004	1960	南雄	2004	1970
深圳	2004	1975	徐闻	1988	1974	连县	2007	1970
佛冈	2004	1972	电白	1983	1970	连平	2014	1972
惠阳	2007	1972	信宜	2007	1972	汕头	1994	1964
广宁	2007	1960	罗定	2007	1975	汕尾	2003	1972
高要	1991	1975	东源	2004	1975	惠来	2003	1975
台山	2004	1970	五华	2007	1975	梅县	2009	1975

年份	EDP/d	实际旱情记载	社会经济损失
2004	52	全省范围内全年重旱,为广东40 a间（1964—2004）最严重的干旱	受灾人口250万人;直接经济损失16.1亿元
2007	51	夏秋冬连旱,历史罕见的严重伏旱	受灾人口189.97万人
2003	50	夏秋冬全省发生了大面积干旱	直接经济损失5.1亿元
2014	49	局部干旱为主,春旱和夏秋旱较重	—
2009	46	夏秋连旱	受灾人口32.5万人
2011	45	春旱	受灾人口133.6万人;直接经济损失2.835亿元
2005	44	接上年秋冬春连旱,9—12月秋冬旱	直接经济损失4.9亿元

年份	月份	干旱事件
2000	1—3月	接上年冬春连旱
2001	1月	接上年冬春旱
2001	9—12月	秋冬旱
2002	1—5月	接上年重春旱
2003	4月底—5月中	春旱
2003	10—12月	冬旱
2004	全年	接上年秋冬春连旱;夏旱、秋冬连旱
2005	1—6月	接上年秋冬春连旱
2005	9—12月	秋冬旱
2006	1—5月	接上年秋冬春连旱
2007	1—3月	接上年冬春连旱
2007	9—12月中	秋冬旱
2008	1—5月	接上年秋冬春连旱
2009	—	—
2010	—	无明显旱情
2011	3—4月	春旱

Spatio-Temporal Variation of Drought in Guangdong Province from 1960 to 2014

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