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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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洞庭湖年径流泥沙的演变特征及其动因
DOI: 10.11821/xb200503017, PP. 503-510
Keywords: 径流,泥沙,驱动力,洞庭湖
Abstract:
通过对洞庭湖1951~1998年径流泥沙演变过程及其驱动力的全面分析表明,径流泥沙关系密切,其相关系数r=0.9013。年径流量、年输沙量总体均呈同步减少趋势,在演变过程中表现出明显的阶段性。由于湘、资、沅、澧四水流域产水量大,森林覆盖率达52%以上,连年兴建的水利工程及工农业、生活用水量的增加,未能对四水河流水文特征产生根本性的影响,其入湖径流泥沙基本处于稳定状态,故没有对湖泊径流泥沙的演变造成深刻影响。而由长江中游河段的调弦口堵口,下荆江系统裁弯和葛洲坝截流所引起的3次江湖水沙关系调整,即是导致洞庭湖径流泥沙缓减速减的主动因子。
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