河南黄河当前防洪形势

近十几年，由于黄河上中淤自然条件及水利工程等因素的影响，黄河下游的水沙条件有较大的变化，年长流量及年输沙星均大幅度减少，使得河南河段河道主槽严重淤积；

Current Situation of Flood Prevention of the Yellow River in Henan Province

There have been large change of sediment and water conditions in the lower Yellow caver in recent decades because of the influence of the change in the up and middle reaches as well as the effects of hydraulic projects, which resulted in heavy sedimentation in main channel in Henan reaches along with large scale reduction of annual runoff and inflow sediment; the section configrration of the river in Henan reach has tremendously developed; "the second suspended river" has become more and more intensive with rapid extension to the reaches up Dongbatou; the bankful discharge has been getting less and less;the water level along the river at same discharge has continuously become higher with probability of overflow and range increased; and the flood delivery capability has reduced a lot. Therefore, it is not optimistic about the current situation of flood prevention of the Yellow River in Henan province, and it is necessary for the river flood prevention department to pay more attention to the new conditions and new issues.