对大灾的反思今年我国长江流域、松花江和嫩江流域发生的历史上罕见的特大洪涝灾害，给我们以反思：一是可持续发展战略的实施必须再次提到重要议事日程，真真切切落到实处。由于我国人口太多，生态环境破坏严重，长江上中游水土流失过大，致使长江中下游江河湖底急剧抬高... Reflections on catastrophe This year’s rare catastrophic floods in the Yangtze River, Songhua River and Nenjiang River valleys in our country reflect on the following issues: First, the implementation of the strategy of sustainable development must once again be referred to the important agenda, In fact. Due to the large population in our country and the serious damage to the ecological environment, the soil erosion in the upper and middle reaches of the Yangtze River is too large, resulting in a dramatic elevation of rivers and lakes in the middle and lower reaches of the Yangtze River.