摘要
采用线性分析、多年滑动平均、Mann-Kendall趋势检验等方法对黄河中游河龙区间1950-2012年的水沙变化特点和趋势进行了分析。结果表明:河龙区间年际水沙变化整体呈现递减趋势,且阶段性变化趋势差异较大;径流量和输沙量在年内分配不均,水文站径流量和输沙量主要集中在汛期;河龙区间年均输沙量分别在1979年和2000年存在两个显著突变点。应用距平累积曲线分析表明,1974年后人类活动对输沙的影响显著增强,1975-2012年人类活动总减沙量为179.75亿t,年均减沙量4.73亿t。研究结果可为流域生态和水利设施建设提供基础理论依据。
Characteristics and variation tendency of the runoff and sediment discharge in the He-Long Reach in 1950- 2012 are studied by linear analysis,moving average and Mann-Kendall trend test. Results show that water and sediment in He-Long Reach showed a significant decreasing trend,and the reducing trend was further more in twenty-first century. The monthly distribution of the water and sediment on hydrological stations were extremely uneven and mainly concentrated in the flood season. Annual sediment transport discharges in the He-Long Reach existed two clear breakpoints,one was in 1999 and other was 2000. The Anomaly cumulative curve of rainfall and sediment yield showed that the impact of human activities on sediment was significant after 1974,the total sediment reductionby human activity in 1975- 2012 were 179. 75 × 10^8 t and the annual average sediment reduction was 4.73 × 10^8 t.
出处
《泥沙研究》
CSCD
北大核心
2016年第4期55-61,共7页
Journal of Sediment Research
基金
中国科学院知识创新工程重大项目(KZZD-EW-04-03)
"十二五"国家科技支撑计划项目(2012BAB02B05)
水利部公益性行业专项(201401048)
中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2013-14)
国家自然科学基金项目(51309154)
关键词
黄河中游河龙区间
水沙变化
径流量
输沙量
人类活动
He-Long Reach in the Yellow River
variations of runoff and sediment
runoff
sediment
human activity
