1979年秋季以来,华北地区出现了近百年来少有的干旱,今年的情况更加严重,3～5月降雨量比常年偏少5～7成,7月中下旬以来也没有较大降雨,形成“汛期无汛”。海河流域的主要河道干涸,京、津、冀地区的密云、官厅、北大港等20余座大型水库都没有蓄上水。 Since the fall of 1979, there have been rare droughts in North China in recent 100 years. This year the situation is even worse. From March to May, the rainfall is 5-7% less than normal years. There is no heavy rainfall since mid-to-late July, forming “Flood season without floods.” The main river courses in the Haihe River Basin have dried up. There are no more than 20 large reservoirs in Miyun, Guanting and Beidagang in Beijing, Tianjin and Jihai.