欢迎访问《中国农学通报》,

中国农学通报 ›› 2020, Vol. 36 ›› Issue (4): 95-100.doi: 10.11924/j.issn.1000-6850.casb18090118

所属专题: 农业气象

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

1971—2015年鲁西南地区旱涝演变时空分布特征

李瑞英, 任崇勇   

  1. 菏泽市气象局,山东菏泽 274000
  • 收稿日期:2018-09-26 修回日期:2019-04-26 出版日期:2020-02-05 发布日期:2020-02-08
  • 作者简介:李瑞英,女,1981年出生,山东菏泽人,高级工程师,硕士,研究方向:气象服务与气候资源。通信地址:274000 山东菏泽牡丹区东方红西街365号 菏泽市气象局,Tel:0530-5620060,E-mail:lirycg@163.com,404610740@qq.com。
  • 基金资助:
    山东省气象局青年基金项目“菏泽牡丹气候适宜性评价分析”(2016SDQN20)

Drought-Flood Evolution in Southwest Shandong from 1971 to 2015: Spatial and Temporal Distribution Characteristics

Li Ruiying, Ren Chongyong   

  1. Heze Meteorological Bureau, Heze Shandong 274000
  • Received:2018-09-26 Revised:2019-04-26 Online:2020-02-05 Published:2020-02-08

摘要:

旨在分析鲁西南地区的旱涝时空分布特征。笔者利用鲁西南地区9个县区1971—2015年的逐月降水资料,采用不同时间尺度的标准化降水指数(SPI)分析旱涝变化特征。结果表明:鲁西南地区20世纪70年代以雨涝为主,80年代干旱加剧,90年代又转为雨涝,21世纪00年代干旱持续减弱,雨涝加剧;旱涝的季节变化呈现旱涝交替发生的特点,其中夏季雨涝发生较为频繁,春夏秋季的SPI线性变化趋势较为平稳,无明显的干旱或雨涝趋势,冬季雨涝呈微弱增多趋势,干旱减少,但变化趋势不明显;在旱涝的空间分布上,全区3个区域的旱涝变化趋势基本一致,整体均呈微弱的雨涝化趋势,但变化趋势未达显著水平;21世纪初期的旱涝变率最大,20世纪70年代—90年代前期的旱涝变率无明显变化,90年代后期至21世纪初期的旱涝变率呈现出明显的干湿变化。鲁西南地区的旱涝变化具有明显的阶段性,旱涝发生极为频繁,整体呈现出涝—旱—涝的变化过程。

关键词: 旱涝, 演变, SPI, 交替, 鲁西南, 时空分布

Abstract:

The paper aims to analyze the spatial and temporal distribution characteristics of drought-flood in southwest Shandong. Based on the monthly precipitation data of 9 counties in the region from 1971 to 2015, we analyzed the variation characteristics of drought-flood by using the standardized precipitation index with different time scales. The results showed that: the flood was more frequent in the 1970s, drought increased in the 1980s, while it turned into flood in the 1990s, and drought continued to weaken, flood increased in the 2000s; the characteristics of seasonal changes all showed drought and flood occurred alternately while the flood occurred more frequently in summer, the linear trend of SPI in spring, summer, autumn were relatively stable, it had no obvious change trend, the flood in winter showed a slightly increasing trend while drought decreased with no obvious change trend; the trend of drought-flood in 3 areas were basically identical, showing an overall watering trend which did not reach the significant level; the rate of drought-flood was relatively stable from 1970s to the early 1990s while was the maximum in the early 21 st century, and there was obvious dry-wet change from the late 1990s to the early 21 st century. In southwest Shandong, the change of drought-flood has obvious stages and the occurrence is extremely frequent, and the whole process is flood-drought-flood.

Key words: drought-flood, evolution, standardized precipitation index, alternate, southwest Shandong, spatial and temporal distribution

中图分类号: