试从气候和人类活动看黄河问题

Climate and Human Activities' influence to the Yellow River

该文从气候和人类活动的角度出发 ,选取了人类历史时期的两个时间段 (194 9年以前和以后 ) :在第一阶段 ,从农牧业界线的变迁、黄河下游的河湖变迁、黄河曲率的变化、历史时期的气候和黄河在历史时期的决淤泛滥频率的对比与关系方面分析 ,得出黄河下游的决淤泛滥有两个最关键的因素 ,即人类活动叠加于气候的变迁之上 ;在第二阶段 ,黄河下游及河口三角洲延伸缓慢 ,主要原因应是气候的变化 ,所以黄河中游的生态建设切不可掉以轻心。

In this paper, there are two stages: one is before 1949 A. D., the other is after that time. To the first period, by analyzing the move of agriculture-husbandry's line, the lakes changing in the lower Yellow River, the change of curvature of Yellow River, the changing of climate during the historic period, we can draw a conclusion that the two predominate elements of Yellow River's overflow are climate and human activities. In the past 50 years, we can't believe that the changing of human activities' manner in the middle of Yellow River has improved the cases in the lower and the river mouth delta of Yellow River. Climate is the first important sector. Ecological construction must be done or continued in the middle reaches of the Yellow River.