采砂对河道生态环境的影响及对策综述

发布时间：2018-05-19 01:29

本文选题：河流生态系统 + 采砂　；参考：《泥沙研究》2017年02期

【摘要】：砂石是河流生态系统的重要组成部分,是河流生物附着生存的物理基底和重要生境要素。为满足修建公路、桥梁、房地产开发等多方面的需求,河道采砂的强度和规模与日俱增。大规模的河道采砂会引起一系列严重的生态环境后果,包括河床下切导致河势失稳,河道水位和漫滩洪水发生频率下降,地表径流和地下水分配格局发生变化,河流生境和生物多样性下降,威胁着河流生态系统结构和功能的完整性,使得系统稳定性和抵抗力下降。在理解生态环境影响机理的基础上制定有针对性的管理对策,有助于将河道采砂造成的干扰控制在河流系统可以承受的范围之内,减轻或避免产生负面的生态环境问题。
[Abstract]:Sand is an important part of river ecosystem, which is the physical base and important habitat element of river biological attachment. In order to meet the needs of highway, bridge and real estate development, the intensity and scale of sand mining are increasing. Large-scale sand mining in river channels can cause a series of serious ecological and environmental consequences, including river regime instability caused by river bed cutting, decrease of river water level and flood frequency, change of surface runoff and groundwater distribution pattern. The decline of river habitat and biodiversity threatens the integrity of the structure and function of river ecosystem and reduces the stability and resistance of the system. On the basis of understanding the mechanism of ecological environment influence, it is helpful to control the disturbance caused by sand mining in river course within the range that the river system can bear, and to reduce or avoid the negative ecological environment problems.
【作者单位】：湖南农业大学生物科学技术学院;湖南省水文水资源勘测局;中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室;中国科学院亚热带农业生态研究所洞庭湖湿地生态系统观测研究站;
【基金】：国家科技支撑计划项目(2014BAC09B03)
【分类号】：TV85;X52

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