洪泛作用下沼泽湿地化学元素空间分布结构研究

Spatial Structures of Chemical Elements in Marsh Wetlands Affected by Flooding

以无尾河下游漫流区—洪泛沼泽湿地为研究对象 ,根据不同水力梯度洪泛作用淹水频率的差异 ,在距主河道不同距离处分层采集沉积物样品 ,对其中K、Na、Ca、Mg、Cu、Zn、Fe、Mn、Cr、Ni、Co、Pb、TOC、TN、pH空间变化规律进行分析探讨。结果显示 ,多数化学元素含量随距河道距离的增加和采样层深度的增加而降低。距离河流越远化学元素含量在垂直方向上的分布越均衡 ,变化的幅度减小。说明随着距主河道距离的增加 ,洪泛作用对沉积剖面中 110cm以内各深度层次上的化学元素含量的影响在变小。对金属元素及部分理化参数的相关分析表明其间的相关性较显著。

Here we reported a case study on the flooding marsh wetlands at downstream of an anourous river Huolin River Was reporped. According to different hydraulic gradient of flooding, The author collected sediment samples by layers at different distance away from the main watercourse and integrate analyzed the spatial structures of K, Na, Ca, Mg, Cu, Zn, Fe, Mn, Cr, Ni, Co, Pb, TOC, TN (Total Nitrogen) and pH. Results showed that a majority of chemical elements were decreased along with being apart from the main watercourse and increasing sampling depth . The distribution of chemical elements became more balancing and decreased in varied range being far more apart from the river, indicating that, along with being apart from the main watercourse, the effects to chemical elements became small within 110 cm sedimentation profiles by flooding. Correlation analysis among metallic elements and part of physical chemical parameters showed their relatively interdependency.