ISSN 1009-6248CN 61-1149/P 双月刊

主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

    高级检索

    西北干旱内陆河下游间歇性生态输水的河岸带生态水文响应研究进展与展望

    Ecohydrological Response in Riparian Zone Under Intermittent Ecologic Water Conveyance in the Lower Reaches of Arid Inland Rivers in NW China: Progress and Prospect

    • 摘要: 间歇性生态输水是恢复干旱内陆河下游生态系统的重要工程措施。输水与断流交替下河岸带一定范围发育水盐动态平衡的淡化带,成为维系河岸带生态系统健康稳定的基础,其背后的生态水文过程与耦合机制尚待明晰。笔者通过梳理西北干旱内陆河下游生态输水的水文生态响应研究进展,以期为干旱内陆河流域水资源高效利用和生态保护修复提供科学依据。重点对河岸带地下水动态响应规律、水分运移过程及模拟研究以及河岸带植被用水策略与生态响应等方面的研究进行系统总结,并从生态输水条件下河岸带地下水动态与植被响应规律、河流与地下水关系演化及河岸带水分储存调蓄机制、输水断流交替条件下河岸林用水策略与耗水量变化以及生态输水方案优化等4个方面提出了进一步研究的展望和建议。未来研究亟需从“河流–地下水–植被系统”地下水动力学机制出发,解析干旱内陆河下游间歇生态输水条件下河流与地下水关系动态演化过程,识别淡化带影响范围及形成演变规律,阐明河岸带水分储存与调蓄功能,揭示河岸带水盐动态平衡机制;从植被用水策略和景观格局变化入手,揭示河岸带植被生态响应规律;通过多源信息精细刻画“河流–地下水–植被系统”结构及其过程,模拟预测不同生态输水情景下地下水盐运移和生态响应过程,提出生态效益最大化的生态输水调度方案优化建议。

       

      Abstract: Intermittent ecological water transport is an important engineering measure to restore the ecosystem in the lower reaches of arid inland rivers. Water desalination zones with dynamic balance of water and salt are developed in riparian zones under alternating water transport and cut-off, which become the basis for maintaining the health and stability of riparian ecosystems. The ecohydrological coupling mechanism behind these zones remains to be clarified. By reviewing the research progress of hydrological and ecological response of ecological water conveyance in the lower reaches of arid inland rivers in northwest China, this paper provides scientific basis for efficient utilization of water resources and ecological protection and restoration of arid inland river basins. The research on dynamic response of groundwater in riparian zone, water transport process and simulation, water use strategy and ecological response of vegetation in riparian zone are summarized. Further research prospects and suggestions were put forward from four aspects: groundwater dynamics and vegetation response law in riparian zone under ecological water conveyance, evolution of the relationship between rivers and groundwater, water storage, regulation and storage mechanism in riparian zone, water use strategy and water consumption changes in riparian forest under alternate water transport and cut off flow conditions, and optimization of ecological water transport schemes. Future research must focus on the "river-groundwater-vegetation system" groundwater dynamics mechanism, analyze the dynamic evolution of the relationship between rivers and groundwater under the intermittent ecological conveyance condition of the lower reaches of arid inland rivers, identify the influence range and formation and evolution law of the desalination zone, and clarify the role of water storage and regulation in the riparian zone. From the perspective of vegetation water strategy and changing ecological landscape patterns to reveal the rule of river bank vegetation ecological response. Multi-source information should be used to describe the structure and process of the "river-groundwater - vegetation system", simulate and predict the groundwater salt migration and ecological response process under different ecological water transport scenarios, and put forward optimization suggestions of ecological water transport scheduling schemes for maximum ecological benefits.

       

    /

    返回文章
    返回