Annual variation characteristics of sediment yield on the loess plateau are analysed by using 16 feature indexes,and the annual variation characteristics of sediment yield in different regions and watersheds are obtained.The result showed that the annual average sediment yield(1955~1986) on the loess plateau was 15.2×108t,the maximum sediment yield was 32.83×108t(1958),the minimum was 4.96×108t(1965),and the ratio between maximum and minimum was 6.62,between maximum and average was 2.16,the coefficient...
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