河南地跨长江、淮河、黄河、海河四大流域,处于南北气候和山区到平原两个过度地带,是全国水旱灾害发生最为频繁,灾害最为严重的省份之一。建国后,为了减少水旱灾害,达到除水害兴水利目的,我省兴建了大量的水库。截至2005年底,我省有大型水库19座(不含黄委直接管理的三门峡、小浪底、故县3座大型水库),中型水库105座,小型水库2215座。这些水库在历 Henan across the Yangtze River, Huaihe River, Yellow River, Haihe four major drainage areas, in the north-south climate and the mountains to the plains two over-belt, is the most frequent floods and droughts, the most serious disaster provinces. After the founding of the PRC, a large number of reservoirs have been built in our province in order to reduce floods and droughts and achieve the purpose of removing water and water. By the end of 2005, there were 19 large reservoirs (3 large reservoirs in Sanmenxia, ​​Xiaolangdi and Guxian counties not directly managed by the Yellow Island Commission), 105 medium-sized reservoirs and 2,215 small reservoirs. These reservoirs are in the calendar