| 韩鹏,倪晋仁.水土保持对黄河中游泥沙粒径影响的统计分析[J].水利学报,2001,32(8):0069-0075 |
| 水土保持对黄河中游泥沙粒径影响的统计分析 |
| Grain size variation of suspended sediment due to soil conservationin the middle reach of Yellow River |
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| DOI： |
| 中文关键词: 水土保持 黄河中游 泥沙粒径 统计 |
| 英文关键词: water and soil conservation middle reach of Yellow River suspended sediment composition statistical method |
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| 摘要点击次数: 1602 |
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| 中文摘要: |
| 利用黄河中游河口 龙门区间干支流水文站近30年的实测资料，采用方差分析及Wilcoxon加符秩检验两种统计方法，分别对河口 龙门区间以及各水文站控制区间泥沙级配在水保前后的变化进行了分析。结果表明，对于单个水文站，只有当流域水保程度较高时，泥沙粒径才表现出明显变细的统计趋势；从整个河口 龙门区间来看，长时段平均的结果表明河流泥沙粒径有明显细化的统计趋势，这一趋势主要与流域上大规模的水土保持活动有关。文中还分析了不同地貌单元水土保持对泥沙粒径的影响。 |
| 英文摘要: |
| Grain size variation of suspended sediment before and aftersoil conservation at some hydrologic stations and in the whole study area are analyzed with statistical method and Wilcoxon signed rank test method respectively. The statistical result of hydrologic stations shows that the sediment becomesmore fine when the soil conservation was implemented and reaches very high level. The long term variation of the grain size within the catchment also reveals atrend of becoming more fine, Which is resulted from the effect of large scaleactivity of soil conservation. Furthermore, qualitative analysis of the geomorphologic effect on grain size is investigated. |
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