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为了解水土保持治理对泥沙过程的影响,在分离了气候变化对水沙过程变化的影响后,结合变动范围法研究了黄河中游多沙粗沙区由于水土保持治理等人类活动引起的水文、泥沙变化的时空演变规律。结果表明,1953～2000年由水土保持工程导致较显著的黄河中游水文变化参数为反转数、10月月平均流量、90d最小流量等12个IHA因子;较显著的泥沙变化参数为10月、4月月平均输沙量、年最大3d输沙量等8个因子;黄河中游多沙粗沙区中多数流域的水文与泥沙变化程度具有相似的空间分布规律;工程措施对水沙过程变化的影响较直接,而非工程措施中植树造林对黄河中游水沙变化影响较大。
In order to understand the influence of soil and water conservation treatment on sediment process, after separating the influence of climate change on the change of sediment process, combined with the scope of variation method, the hydrology caused by human activities such as soil and water conservation, The temporal and spatial evolution of sediment change. The results showed that 12 IHA factors such as inversion number, average monthly flow rate in October and minimum flow rate in 90 d caused by soil and water conservation projects from 1953 to 2000 were significant. The most significant sediment change parameters were October , Average monthly sediment transport in April and maximum annual sediment transport in three years. The hydrological and sediment changes of most of the basin in the middle reaches of the Yellow River have similar spatial distribution patterns. The impact of changes is more direct, while non-engineering afforestation has a greater impact on water and sediment changes in the middle reaches of the Yellow River.