| 梁哲军,王玉香,董鹏,刘步春,张冬梅,刘园,杨印斌,高磊,南雪琴,齐宏立.山西南部季节性干旱特征及综合防御技术[J].干旱地区农业研究,2016,34(4):281~286 |
| 山西南部季节性干旱特征及综合防御技术 |
| Characteristics of seasonal drought and integrated drought-preventing techniques in South Shanxi |
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| DOI：10.7606/j.issn.1000-7601.2016.04.42 |
| 中文关键词: 季节性干旱 标准化降水指数 干旱强度 综合防御技术 山西南部 |
| 英文关键词:seasonal drought standardized precipitation index (SPI) drought intensity integrated drought-preventing techniques |
| 基金项目:山西省科技攻关计划(20150311002-6)；公益性行业（农业）科研专项(201203031)；科技基础性工作专项(2007FY120100) |
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| 中文摘要: |
| 采用标准化降水指数（SPI）为干旱指标，计算了山西省运城市49年（1958—2007年）各月干旱指数，并在此基础上分析了山西南部地区季节性干旱特征。研究表明，干旱强度与干旱频率在不同年代际表现特征不同。与运城地区49年同期均值相比，进入20世纪90年代后，春旱发生频率、干旱强度分别提高了29.0%、5.1%；夏旱发生频率提高41.9%，干旱强度下降了7.4%；秋旱发生频率下降了23.8%，干旱强度提高了7.7%；冬旱发生频率下降了26.6%，干旱强度下降了37.5%。干旱的季节性特征为春旱和夏旱有加重趋势，秋旱和冬旱有减弱趋势。春旱（3—5月）和伏旱（7—8月）作为可预见性干旱，可采用土壤墒情监测、干旱预警、制定系统性抗旱措施等综合防御技术。对于不可预见类型干旱，可采用建立抗旱水源、储备抗旱机械等策略。 |
| 英文摘要: |
| The standardized precipitation index (SPI) was used to calculate monthly drought indices in the recent 49 yrs (from 1958—2007) with precipitation date from meteorological station in Yuncheng district Shanxi Province. Annual and seasonal drought frequency and intensity in southern Shanxi were analyzed with the SPI. The results showed that the drought frequency and drought intensity characteristics varied annually. Drought frequency showed an increasing trend, but drought intensity showed decreasing trends after 1990s. Drought in spring and summer was frequent, but it was not common in autumn and winter. Spring (March to May) and midsummer (July～August) drought can be relieved with integrated drought-preventing techniques, due to its predictability. |
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