| 刘永佳,黄生志,方伟,马岚,郑旭东,黄强.不同季节气象干旱向水文干旱的传播及其动态变化[J].水利学报,2021,52(1):93-102 |
| 不同季节气象干旱向水文干旱的传播及其动态变化 |
| Propagation and dynamic change of meteorological drought to hydrological drought in different seasons |
| 投稿时间：2020-02-16 修订日期：2020-12-04 |
| DOI：10.13243/j.cnki.slxb.20200073 |
| 中文关键词: 气象干旱 水文干旱 动态变化 黄土高原 不同季节 |
| 英文关键词: meteorological drought hydrological drought dynamic change Loess Plateau different seasons |
| 基金项目:国家自然科学基金项目（51709221）；博士后科学基金面上基金项目（2018M640155） |
|
| 摘要点击次数: 2587 |
| 全文下载次数: 2047 |
| 中文摘要: |
| 研究变化环境下气象干旱向水文干旱的传播与影响机制，有利于揭示水文干旱的形成过程与机理，从而建立基于气象干旱的水文干旱预警。为揭示不同季节气象干旱向水文干旱的传播动态变化及其驱动因素，本研究以无定河、窟野河和沁河流域为研究区域，采用标准化降水指数（SPI）和标准化径流指数（SRI）分别表征气象干旱和水文干旱，分析气象、水文干旱的时程变化特征，计算不同季节气象干旱向水文干旱的传播时间，探究影响不同季节干旱传播的主要因子及物理机制。结果表明：（1）气象、水文干旱有加重的趋势，水文干旱对气象干旱的响应具有滞后关系；（2）除窟野河流域变慢外，研究区域不同季节干旱传播整体呈变快的趋势，表明这些区域水循环速率加快；（3）无定河和沁河流域传播时间加快与降水和气温不断变快有关；窟野河流域传播时间的变慢与煤炭开采和水库建造有关。 |
| 英文摘要: |
| Study on the propagation of meteorological drought to hydrological drought and its influence mech- anism under the changing environment is helpful to reveal the formation process and mechanism of hydrolog- ical drought,so as to establish the hydrological drought early warning based on meteorological drought. How- ever, the dynamic changes and driving factors of the propagation of meteorological to hydrological drought in different seasons have not yet been revealed. In view of this,the Wuding River,Kuye River and Qinhe River basins were selected as the research area in this study, standardized precipitation index (SPI) and standardized runoff index (SRI) were adopted to characterize meteorological drought and hydrological drought, respectively, and the temporal characteristics of meteorological and hydrological drought were ana- lyzed. Then,the propagation time of meteorological to hydrological drought and its dynamics in different sea- sons were explored. Furthermore,to explore the main factors and physical mechanism affecting the propaga- tion of drought in different seasons. The results show that:(1) meteorological and hydrological droughts tend to aggravate, and the response time of hydrological drought to meteorological drought has hysteresis; (2) except for the Kuye River basin, the overall drought propagation tends to be faster in different sea- sons, indicating that the speed of water cycle in these areas is faster;(3) the accelerated propagation time of the Wuding River and Qinhe River basins may be related to the increasing precipitation and temper- ature, whilst, the slow propagation time may be related to coal mining and reservoir construction in the Kuye River basin. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|