Abstract
Through an analysis of both the historical and BOHAI S the present-day processes, an effort has been made to deal with the long-term environmental effects induced by man's regulation of the Yellow River of China, which was started/ more than 2,000 years ago. The artificial levee construction / / on the Yellow River was proposed as a prerequisite for re/ / gional development of the LowerYellow River alluvial plain. 3 / / However, the resulting formation of a hanging river led to ° / frequent occurrences of course changes, which closely con1 / Jnan trol the micro-landform formation, the soil formation and / distribution, the surface water and groundwater features, /6/ '4 and so on. Particularly, a descriptive model is proposed to ex/ plain the formation process of micro-landforms controlled /' , 7 , by the artificial levee construction and the course change of 4 the Yellow River. In history, the Yellow River regulation C, strategies of narrowing water flow by diking to scour sediZhenzhou ment and storing the Huaihe River's clear water to scour the Yellow River's sediment were proposed and put into ac tion, giving rise to far-reaching environmental effects. The HONGZHEHU / practice of the former greatly increased the delta's extending. . rate, and the practice of the latter resulted in a sharp expansion of the Lake Hongzhehu, one of the earliest large artificial lakes in the world, and consequently increased the freYANGTZE R quency of flood and water-logging hazards in the middle P Huaihe River basin. bf Nz
Published Version
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