WANG Huimin,HAO Xiangyun,ZHU Zhongyuan.Analysis of Drought Condition Based on Integrated Meteorological Drought Index—Taking the Xilinhe River Basin as an Example[J].Research of Soil and Water Conservation,2019,26(02):326-329,336.
基于综合气象干旱指数的干旱状况分析——以锡林河流域为例
- Title:
- Analysis of Drought Condition Based on Integrated Meteorological Drought Index—Taking the Xilinhe River Basin as an Example
- Keywords:
- weather factor; Xilinhe River Basin; CI; drought event
- 分类号:
- P426.616
- 摘要:
- 降水量与气温是引起干旱的主要气象因子，利用1981—2016年的降水量与气温的逐月数据，绘制最值曲线并对其相关性进行了分析，利用数据计算得到综合气象干旱指数（CI）且用其对锡林河流域干旱状况进行了分析。结果表明：研究区内在1981—2016年中，逐月平均气温最值曲线的变化趋势比较微弱，最高温度与最低温度分别为24.94，-23.53℃。最大降水量的变化趋势呈现出减小的状态，而最小降水量基本无变化，降水量的最大值与最小值分别为178.1，0 mm。36年中，CI指数只有在春季、夏季和秋季3个季节中不为0，在月尺度上只发生轻旱事件共121次，其中春季发生的干旱事件最为频繁；秋季次之；夏季发生干旱事件的频次最少。干旱发生频次呈现出微弱的降低趋势。
- Abstract:
- Precipitation and air temperature are the main meteorological factors in relation to drought. Using the monthly data of precipitation and air temperature from 1981 to 2016, we plotted the curve of maximum and minimum and analyzed the correlation. The integrated meteorological drought index (CI) was calculated using data. CI was used to evaluate the drought conditions in the Xilinhe River Basin. The results showed that in the study area during 1981—2016, the change trend of the mean monthly temperature curve was relatively weak, with the maximum and minimum temperatures being 24.94℃ and -23.53℃, respectively; the change trend of the maximum precipitation presented the decreasing state, while the minimum precipitation did not change substantially; the maximum and minimum values of precipitation were 178.1 mm and 0 mm, respectively. In 36 years, the CI values were greater than zero in the spring, summer, and autumn, and there were only 121 light drought events on the monthly scale, of which drought occurred most frequently in spring, came the next in autumn; the frequency of drought events was the least in summer. The frequency of droughts showed a slightly decreasing trend.
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备注/Memo
收稿日期:2018-06-07;改回日期:2018-06-28。
基金项目:国家自然科学基金（51669018，51779116）
作者简介:王慧敏(1994-),女,内蒙古宁城县人,硕士研究生,研究方向为干旱区水资源可持续利用与规划。E-mail:1710083769@qq.com
通讯作者:朱仲元(1956-),男,内蒙古凉城县人,教授,博士生导师,主要从事水文水资源与草原生态研究。E-mail:731011410@qq.com