| 景观格局对河流水质影响的尺度效应Meta分析 |
| 摘要点击 3045 全文点击 73 投稿时间：2023-06-21 修订日期：2023-07-27 |
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| 中文关键词 景观格局 河流水质 尺度效应 破碎度 土地利用 |
| 英文关键词 landscape pattern river water quality scale effect fragmentation land use |
| 作者 | 单位 | E-mail | | 王玉仓 | 浙江大学环境与资源学院, 杭州 310058
环境修复与生态健康教育部重点实验室, 杭州 310058 | w_yucang@163.com | | 杜晶晶 | 浙江大学环境与资源学院, 杭州 310058
环境修复与生态健康教育部重点实验室, 杭州 310058 | | | 张禹 | 浙江大学环境与资源学院, 杭州 310058
环境修复与生态健康教育部重点实验室, 杭州 310058 | | | 吴昊 | 浙江大学环境与资源学院, 杭州 310058
环境修复与生态健康教育部重点实验室, 杭州 310058 | | | 胡敏鹏 | 浙江大学环境与资源学院, 杭州 310058
环境修复与生态健康教育部重点实验室, 杭州 310058 | | | 陈丁江 | 浙江大学环境与资源学院, 杭州 310058
环境修复与生态健康教育部重点实验室, 杭州 310058
浙江省农业资源与环境重点实验室, 杭州 310058 | chendj@zju.edu.cn |
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| 中文摘要 |
| 景观格局决定了陆域污染物的源汇过程,是影响河流水质状况的关键因素.由于尺度效应,不同尺度下景观格局与河流水质关系的研究结果不尽相同.然而,景观格局对河流水质影响的尺度效应问题尚缺乏系统研究.收集了国内外4 041条研究数据,采用Meta分析法定量分析了不同尺度下景观格局对河流水质的作用特征,识别了影响河流水质的关键时间和空间尺度以及景观指数.结果表明,相对于降水事件、平水期和年际尺度,丰水期下景观格局对河流水质的影响最大；相对于流域尺度,缓冲区尺度的景观格局对河流水质的影响更大；丰水期-缓冲区尺度是景观格局影响河流水质的关键时空耦合尺度.与耕地、水域、草地以及流域整体景观相比,林地和城镇用地的景观格局对河流水质的影响更大；破碎度是影响河流水质最重要的景观格局因子.在河流水质治理中,应重点考虑缓冲区的景观配置,增加缓冲区林地面积、减少林地和水域的斑块密度和减少城镇用地的面积占比和聚集度,以有效保护河流水质. |
| 英文摘要 |
| The landscape pattern determines water pollution source and sink processes and plays an important role in regulating river water quality. Due to scale effects, studies on the relationship between landscape pattern and river water quality showed variance at different scales. However, there is still a lack of integrated study on the scale effect of landscape pattern and river water quality dynamics. This study collected 4 041 data from results of previous publications to address the characteristics of landscape pattern and river water quality dynamics at different scales and to identify the key temporal and spatial scales as well as landscape pattern indices for regulating river water quality. The results indicated that, compared to precipitation events, base flow periods, and interannual scales, the high-flow period was the key temporal scale for linking landscape pattern on river water quality. Compared to the watershed scale, the landscape pattern of buffer zones had a greater impact on river water quality. The high-flow period-buffer zone scale was the key spatiotemporal coupling scale for linking landscape pattern and river water quality. Compared to croplands, water bodies, grasslands, and the overall landscape of the watershed, the landscape pattern of forests and urban areas had a greater impact on river water quality. Fragmentation degree was the most important landscape pattern factor regulating river water quality. In river water quality management, it is important to focus on the landscape configuration of buffer zones, increase forest area, reduce patch density of forests and water bodies, and decrease the aggregation degree of urban areas. |
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