杨守业, 印萍. 自然环境变化与人类活动影响下的中小河流沉积物源汇过程[J]. 海洋地质与第四纪地质, 2018, 38(1): 1-10. DOI: 10.16562/j.cnki.0256-1492.2018.01.001
引用本文: 杨守业, 印萍. 自然环境变化与人类活动影响下的中小河流沉积物源汇过程[J]. 海洋地质与第四纪地质, 2018, 38(1): 1-10. DOI: 10.16562/j.cnki.0256-1492.2018.01.001
YANG Shouye, YIN Ping. Sediment source-to-sink processes of small mountainous rivers under the impacts of natural environmental changes and human activities[J]. Marine Geology & Quaternary Geology, 2018, 38(1): 1-10. DOI: 10.16562/j.cnki.0256-1492.2018.01.001
Citation: YANG Shouye, YIN Ping. Sediment source-to-sink processes of small mountainous rivers under the impacts of natural environmental changes and human activities[J]. Marine Geology & Quaternary Geology, 2018, 38(1): 1-10. DOI: 10.16562/j.cnki.0256-1492.2018.01.001

自然环境变化与人类活动影响下的中小河流沉积物源汇过程

Sediment source-to-sink processes of small mountainous rivers under the impacts of natural environmental changes and human activities

  • 摘要: 山地小河在地球环境变迁和大陆边缘物质循环过程中具有重要作用,且受人类活动干预影响越来越明显。相比世界大河而言,中小河流多具有瞬时大通量、快速物质转换、易受极端事件和人类活动影响,且对环境变化响应敏感等特点,但学术界对它们的研究很薄弱。目前迫切需要以地球系统科学的思路来重新审视中小河流在圈层相互作用中的角色,加强中小河流地学的系统研究,尤其是通过系统的野外观测与采样分析,积累较长期的实时连续现场水文泥沙等多参数观测资料;同时利用多学科交叉和多方法集成的研究手段,重点研究在全球变化与人类活动影响的双重因素驱动下,世界主要大陆和岛屿地区代表性的中小河流入海物质的通量与组成,向边缘海和全球大洋的物质输运、埋藏与循环过程,以及对不同尺度的全球气候变化和海陆物质循环的响应和影响;重点揭示不同纬度、地带性气候和人类活动影响下的中小河流代表的源汇体系特征,及与世界大河源汇体系的差异,深入理解地球表生过程和全球海陆相互作用的机制。

     

    Abstract: Small mountainous river systems (SMRS) play a key role in the global environmental changes and material cycle on the continental margin, and are subject to increasing human perturbation. Compared to large river systems, the SMRS are characterized by rapid and huge discharges, fast sediment transfer, and being easily influenced by extreme events and human activities, which make them more sensitive to global environmental changes. However, they have received less research attention relative to large rivers. Currently, the role of SMRS that play in the interactions among earth's spheres deserves more in-depth researches, as the concept of earth system science is put under consideration. In particular, the combination of real time and long term hydrographic observations in the fields with multi-disciplinary analytical approaches is urgently needed for better understanding the role of these rivers played on earth surface processes. The major research directions include the discharges and compositions of dissolved and particulate materials by the SMRS from continents and islands into the global oceans, under the impacts of natural environmental changes and human activities, and the difference in sediment source-to-sink processes between the SMRS and large rivers. The comprehensive understanding of SMRS will definitely increase our recognition on earth surface processes and global sea-land interactions.

     

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