| 张信宝,文安邦.长江上游干流和支流河流泥沙近期变化及其原因[J].水利学报,2002,33(4):0056-0059 |
| 长江上游干流和支流河流泥沙近期变化及其原因 |
| Variations of sediment in upper stream of Yangtze River and itstributary |
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| DOI： |
| 中文关键词: 长江上游 河流泥沙 近期变化 |
| 英文关键词: current variation sediment yield Jinsha River Jialing River upper stream Yangtze River |
| 基金项目: |
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| 中文摘要: |
| 通过长江上游宜昌水文站、金沙江屏山水文站和嘉陵江北碚水文站20世纪50年代以来径流量和输沙量的变化分析，表明宜昌站多年水沙关系未见有明显的变化，属正常波动。20世纪80年代以来，长江上游主要支流嘉陵江和金沙江的水沙关系发生了不同的变化，嘉陵江的河流泥沙呈明显减少的趋势，金沙江呈略有增加的趋势，嘉陵江、金沙江两流域的侵蚀、产沙、输沙环境条件差异较大。人类活动的方式、程度，植被破坏与恢复，水土流失治理，水利工程拦沙和工程建设增沙等的明显差异，是20世纪80年代以来，嘉陵江和金沙江水沙变化不同的主要原因。 |
| 英文摘要: |
| The observation data show that the sediment yield of Jialing River has decreased since 1980s,while the sediment yield of Jinsha River has increased.The cause of this change is analyzed.It is shown that the influence of engineering works on increment of river sediment of Jinsha River basin is much greater that in Jialing River basin due to the fact that the Jinsha River basin is characterized by deeply dissected plateau gorge landform and the jailing River basin by gently dissected hill landform.Current decline of sediment yield in the Jialing River is caused by the positive influences of human activities on reduction of sediment,such as revegetation,soil conservation and water conservation works.The increase of sediment yield in Jinsha River is caused by the negative influence of human activities,such as land degradation,engineering works and channeling works. |
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