当前位置:首页>南京>中科院南京土壤所夏永秋课题组WR:优先开展河岸带尺度景观治理,是我国管控河流水质的一种空间高效治理策略

中科院南京土壤所夏永秋课题组WR:优先开展河岸带尺度景观治理,是我国管控河流水质的一种空间高效治理策略

  • 2026-05-29 11:34:24
中科院南京土壤所夏永秋课题组WR:优先开展河岸带尺度景观治理,是我国管控河流水质的一种空间高效治理策略

 文章信息

文章标题:Prioritizing riparian scale landscape management is a spatially efficient strategy for controlling river water quality in China

作者:Haojie Han 等

单位:中国科学院南京土壤研究所 等

期刊:Water Research

出版日期:2026 年

doi:10.1016/j.watres.2026.126002

摘要

确定景观治理的最优空间尺度对于有效改善河流水质至关重要,尤其是在流域尺度与河岸带尺度哪个更为有效的问题上。为此,本研究基于全国441 个流域,在8 个空间尺度(4 类流域尺度、4 类河岸带尺度)下,系统分析水质与景观-地理气候因子的关系。结果表明:地理气候条件可解释 18%–23% 的水质变异,景观因子可解释 17%–32%。关键发现是:河岸带尺度的解释力(40%–50%)与全流域尺度基本相当,但占地远小。同时存在明确的尺度依赖权衡:河岸带尺度以景观组成为主导,流域尺度以景观格局为主导。研究表明,优先开展河岸带尺度景观治理,能用远小于全流域治理的面积,获得几乎同等的水质改善效果,为资源约束下的环境规划提供精准空间策略。

 研究背景

我国河流水质污染压力大,面源污染主控,景观格局是关键可调控因素。

学界长期争论:治理应优先全流域还是河岸带?结论不一致。

以往研究局限:区域小、样本少、仅对比 “全流域 vs 全河岸带”,忽略近河岸近端区域的关键作用。

科学缺口:缺乏全国大样本、多近端嵌套尺度的对比证据,无法给出高效空间治理路径。

 研究方法

1. 研究范围

全国441 个流域,覆盖主要气候与土地利用梯度,以国家自动监测站为出口。

2. 8 个空间尺度设计

流域尺度:以站点为中心,半径 10/25/50km 圆形区 + 全流域。

河岸带尺度:沿河道向上游延伸 10/25/50km、宽 1km的缓冲区 + 全河段河岸带。

3. 数据与指标

水质:TN、TP、电导率、pH(2021.6–2024.5 均值)。

景观:组成(耕地、林地、不透水面、水域占比);格局(聚集度、均匀度等)。

地理气候:降雨、坡度、地形发育指数(HI)。

4. 分析方法

冗余分析 RDA + 方差分解 VPA:量化各因子解释力。

多元线性回归:分指标拟合尺度效应。

突变点分析 nCPA:识别水质突变的景观阈值。

研究结果

1. 总体解释力

总解释率:河岸带(40%–50%)≈ 全流域(40%–49%)。

河岸带全域尺度解释力最高(50%),略超全流域。

2. 尺度依赖规律

河岸带尺度:景观组成占主导(耕地、林地、不透水面占比)。

流域尺度:景观格局占主导(聚集、连通、配置)。

地理气候(降雨、地形)在所有尺度均为重要驱动(18%–23%)。

3. 关键景观因子

林地:最强保水因子,负向驱动 TN、TP、电导率。

不透水面:最强污染因子,正向驱动污染物浓度。

耕地:主要农业面源贡献。

4. 水质突变阈值(河岸带全域尺度)

不透水面占比 **≈5%–11%**:超过则水质显著恶化。

耕地占比 **≈27%**:超过后污染风险陡增。

林地占比 **≈36%–52%**:高于此区间水质明显改善。

5. 空间格局

TN、电导率呈北高南低,与耕地、降雨梯度高度吻合。

TP 空间破碎,受局地农业与城镇影响更强。

 讨

1. 河岸带高效机制

河岸带是陆域污染物入河最后关口,距离近、输移路径短、效率高。

小面积即可实现强拦截,投入产出比远高于全流域治理。

2. 尺度权衡机制

近河岸:“是什么用地” 最重要(组成)。

大流域:“用地怎么排布” 最重要(格局 / 连通性)。

降雨起稀释作用,地形陡峭(高 HI)会加速冲刷、降低自净。

3. 管理启示

优先治理河岸带 1km 缓冲区是我国水质管控的空间高效策略。

守住阈值:不透水面<5%、耕地<27%、林地>50%。

流域层面重点优化景观连通与聚集格局。

4. 局限性

TP 解释率偏低(~26%),未考虑土壤磷库、农业管理细节。

采用均值数据,未体现季节与暴雨事件差异。

未纳入点源与河道内过程。

 结

全国 441 个流域证实:河岸带尺度解释力≈全流域,但面积占比极小。

尺度依赖规律:河岸看组成,流域看格局。

地理气候是基础驱动,降雨稀释、陡坡加剧污染。

优先开展河岸带尺度景观治理,是我国管控河流水质空间高效、低成本的优选策略。

提出可量化阈值,为精准治污提供科学依据。

版权声明

本文来源:水生态环境科学

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  1. CONNECT:[ UseTime:0.000752s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000639s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001344s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.002832s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000540s ]
  6. SELECT * FROM `set` [ RunTime:0.000504s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000568s ]
  8. SELECT * FROM `article` WHERE `id` = 569892 LIMIT 1 [ RunTime:0.002825s ]
  9. UPDATE `article` SET `lasttime` = 1780400010 WHERE `id` = 569892 [ RunTime:0.004288s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.001081s ]
  11. SELECT * FROM `article` WHERE `id` < 569892 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000891s ]
  12. SELECT * FROM `article` WHERE `id` > 569892 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000494s ]
  13. SELECT * FROM `article` WHERE `id` < 569892 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000709s ]
  14. SELECT * FROM `article` WHERE `id` < 569892 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000849s ]
  15. SELECT * FROM `article` WHERE `id` < 569892 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000805s ]
0.158487s