进入八十年代,辽东山区频繁发生洪水泛滥、啸山、滑坡等自然灾害,造成冲毁房屋、死亡人畜、水冲砂压耕地等惨重损失。灾害的频生,意味着生态的严重失调,如辽东山区九县的水土流失面积已达1700万亩;丹东市的土址侵蚀模数从解放初的700吨,增加到1500吨;宽甸、岫岩两县森林复盖率已分别下降了21%和20%等。 In the 1980s, natural disasters such as flood flooding, Xiao mountain and landslides frequently occurred in the mountainous areas of eastern Liaoning Province, causing heavy losses such as the destruction of houses, deaths of livestock and poultry, and the scouring of cultivated land by water scour. Frequent disasters, which means a serious ecological imbalance, such as nine counties in Liaodong mountainous area has reached 1700 mu of soil erosion; Dandong City, the site of erosion modulus from the liberation of 700 tons, increased to 1500 tons; Kuandian, Xiuyan two counties forest coverage rate has dropped by 21% and 20% and so on.