| 周晓红,赵景波,王国祥.渭河高陵段河漫滩沉积物指示的洪水演变[J].干旱地区农业研究,2007,(5):226~231 |
| 渭河高陵段河漫滩沉积物指示的洪水演变 |
| The sediment of floodplain instruction flood change in Gaoling part of the Weihe River |
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| DOI：10.7606/j.issn.1000-7601.2007.05.44 |
| 中文关键词: 洪水演变 河漫滩沉积 粒度分析 渭河 历史洪水 |
| 英文关键词:flood evolvement floodplain sediment grain size analysis the Weihe River flood history |
| 基金项目:教育部重大招标项目(04JAZJD770016) |
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| 摘要点击次数: 411 |
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| 中文摘要: |
| 据渭河高陵河漫滩沉积物野外调查和110个样品的颗粒分析,并结合历史文献资料,研究了高陵渭河近120 a来洪水深度、洪水规模、洪水变化与气候的关系。根据分析得出:高陵渭河近120 a来河漫滩沉积保存厚度约为4.0 m,颗粒成分主要为粗粉砂、极细砂和细砂,其中粗粉砂平均值为31.79%,极细砂平均值为23.55%,细砂平均值为19.63%。剖面中胶粒、粘粒、细粉砂、中砂、粗砂值都较小,但各层含量亦有明显的不同,具有粗细变化的节律;剖面包括16个沉积层,代表16个沉积阶段,指示16次明显的大洪水过程,其中第6、9、12、15、16、1为特大洪水,第5、14、7、11、3、13、8、10、4、2层为大洪水阶段,这些洪水阶段反映了沉积时期气候及其降水量的较大变化。 |
| 英文摘要: |
| Based on the detailed investigation in the Gaoling part of the Weihe River and the grain size analysis of 110 samples and the chronology material recorded by the historical book,the flood depth,the flood scale,the relations between flood and the climate change for nearly 120 years have been studied.According to the analysis some conclusions have been summarized as follows: The thickness of high mausoleum alluvial flat deposit of the Weihe River is approximately 4.0m in the past 120 years.The size ingredients mainly include the thick silt and the silver sand and the thin sand.The average content of the thick silt,the silver sand and the thin sand is 31.79%,23.55% and 19.63% respectively.The contents of colloid granularity,the clay granularity,the thin silt,the middle sand and the coarse sand are all small,but each content has obvious difference.There is an obvious variety rhythm of granularity along with the depth.The profile include 16 obvious deposit formations and it represents 16 deposition stages and instructs 16 obvious big flood processes,in which the 6th、9th、12th、15th、16th、1st are the catastrophic flood,the 5th、14th、7th、11th、3rd、13th、8th、10th、4th、2nd are the big flood stages,these flood stages have reflected the climate and precipitation change during the deposition time. |
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