海洋地质与第四纪地质2018，Vol.38Issue(1)：52-61,10.DOI:10.16562/j.cnki.0256-1492.2018.01.006
气候变化和人类活动对鸭绿江流域入海水沙通量的影响
Variations in water discharge and sediment load in the Yalu River catchment induced by human activities and climate changes
摘要
Abstract
In order to reveal the influence factors dominating the water input and sediment discharge into the sea from the Yalu River catchment,the numerical model of HydroTrend3.0.4 with three scenarios,i.e.the climate change-driven,Human activities-driven,and combined climate change and human activities-driven senarios,is adopted to simulate water and sediment fluxes into coastal coastal ocean during the period of 1958-2012 at two river gauging stations.Results indicate that,during the period,water discharge of climate change-driven,Human activities-driven,and combined climate change and human activities-driven scenarios were 264.5 × 108 m3/a,264.3 × 108 m3/a and 263.7 × 108 m3/a,and sediment load was 5.53Mt/a,1.62Mt/a and 1.59Mt/a,respectively.The observed water discharge and sediment load were 259.2 × 108 m3/a and 1.48Mt/a.Under the scenario driven by climate change,the main factor dominating the variation of water discharge is precipitation,and the sediment flux variation under natural condition is mainly controlled by frequent flood events during the wet season.However,under the scenario of the combined climate change and human activities-driven,the intensifying human activities have caused dramatic change in sediment load into the sea:the anthropogenic impact can totally decrease the sediment flux of the Yalu River by 3.94Mt/a,including an increase in 1.2Mt/a sediment yielding by water and soil erosion,and a larger decrease in 5.14Mt/a by the dam interception effect.We also found that the sediment load entering the sea of the Yalu River before 1940 (pre-dams) was about 6.67Mt/a,5 times of the present sediment load into the sea.关键词
气候变化/人类活动/入海水沙通量/鸭绿江流域Key words
climate change/human activities/water discharge/Yalu River分类
资源环境引用本文复制引用
盛辉,高建华,刘强,艾乔,汪亚平,白凤龙,李军..气候变化和人类活动对鸭绿江流域入海水沙通量的影响[J].海洋地质与第四纪地质,2018,38(1):52-61,10.基金项目
国家自然科学基金“从鸭绿江到辽东半岛东岸泥区:气候变化和人类活动驱动下的源汇过程”(41576043) （41576043）
国家自然科学基金“我国东部海域末次盛冰期以来沉积格局的物源控制和沉积物收支”(41476052) （41476052）
国家杰出青年科学基金“河口海岸学:潮控河口海岸沉积体系与地貌演化的现代过程研究”(41625021) （41625021）
