近年来我国旱涝事件呈现出广发和频发趋势, 严重破坏了水资源供需平衡, 极大地制约着国民经济的快速发 展。依据汾渭平原水文、气象和历史旱灾资料, 划分了干旱事件等级, 绘制了干旱事件图谱, 分析发现汾渭平原近年 来发生干旱事件的频次越来越密集。利用汾河平原和渭河平原长序列年降水资料( 1951 年- 2012 年) , 基于SPI 法 计算结果, 分析了两平原降水的丰枯异步性和旱涝事件的重现期, 印证了汾渭平原可以进行旱涝/ 空间集合应对0 的 条件, 为进一步优化晋陕两省水资源配置提供了有力的技术支撑。

The droug ht and water lo gg ing in China have been show ing a wide and fr equent trend, dest roy ing the supply and de2 mand balance o f w ater resources ser iously , and r estr icting the develo pment of the nat ional economy gr eatly in recent years. Firstly, based o n the hydro log ical, meteor olog ical and dr ought disast er data in Fen2wei plain, dr ought events g rades ar e desig ned and the relat ed mapping s are drew ; the results show that t he dro ug ht events happened f requent ly in recent year s. Secondly, the dr ought2w aterlog ging asynchr onism and the hydro log ic r etur n per io d in Fen2wei plain using t he pr ecipitatio n data( 195122012) based on SPI, which reflects the conditio n space set compr ehensive responses at the same time in Fen2wei pla in. The results could supply t he r eference to water resources optimization in Shanx i and Shaanx i pro vince.

中国工程院重大咨询项目( 20122ZD213) ; 国家自然基金面上项目( 51279207)