海河流域是我国政治、经济、文化的中心地区 ,无论是政治还是经济社会的发展 ,都需要有可靠的防洪安全保障和水资源保障。由于特殊的地理环境和气候特征 ,流域降水的时空分布和年际分布极不均匀 ,使海河流域的洪水威胁和水资源短缺的威胁同时并存 ,这双重威胁在全国和世界上都 The Haihe River Basin is a political, economic and cultural center of China. Whether in politics or in economic and social development, there is a need for reliable flood control and water resources protection. Owing to the special geographical and climatic characteristics, the temporal and spatial distribution of precipitation in the basin and the extremely uneven interannual distribution make both the flood threat and the water shortage threat in the Haihe River Basin co-exist at the same time, both in the whole country and in the world