On the basis of intensive investigation data of gully features in morphology and stratum contacts and C14 datings,this paper get the follow results the Luo he river and its main tributaries were formed in 555 ha B. P.,i. e. mid-middle pleistocene,and after that 5 periods of intensive erosion have gone through.The eroded capacity and rates in each period are as follows: 330250ha B. P., 945. 624t/a.;250-140ha B.P.,672.51t/a.; 140-10ha B.P.,541.73 t/a.; 10kaB. P.,2 535. 98t/a.,headed erosion rates in 5 000 a B...
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