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汾河流域农业面源污染时空分布特征及潜在风险分区

  • 2026-05-14 15:28:07
汾河流域农业面源污染时空分布特征及潜在风险分区

来源:《农业环境科学学报》2026年3期

作者宋彩云1,张鹏飞1,2,李晓璐1,2,牛凯杰1,2,刘庚1,2*

单位1. 太原师范学院地理科学学院;2. 汾河流域地表过程与资源生态安全山西省重点实验室

摘要
本研究聚焦汾河流域区域性农业面源污染问题,运用等标污染负荷法、自然间断点分级法、极差法和熵值法开展汾河流域40个县(市、区)2012—2022年农业面源氮磷污染时空分布特征及潜在风险研究。结果表明,流域农业面源污染排放总体呈波动下降趋势,总氮(TN)和总磷(TP)分别下降了11.99%和13.19%,总体来说,2018—2019年TN和TP下降最为显著,下降幅度达10.74%和9.15%,此后污染排放缓慢增加。农村生活源的排放量下降最大,两污染物下降幅度均为24.58%;流域中游和下游县区的农业面源污染程度显著高于上游地区,其中清徐县、新绛县和绛县3县被划分为高风险区,流域内其余37个县(市、区)属于中、低风险区。因此,需根据不同区划类型,构建农业面源污染“分区施策、精准防控、系统治理”体系,依据区域环境风险等级差异,采取组合化、差异化的防治策略。
结论
1)2012—2022 年汾河流域农业面源污染时空分异特征显著。时序上,TN 和 TP 排放量呈递减趋势,累计分别削减 0.47 万 t 和 0.12 万 t,2018—2019 年降幅达 10.74% 和 9.15%。污染源结构演变表现为:化肥流失系数下降 19.74%(TN)和 20.59%(TP);畜禽养殖污染 2019 年骤降(TN 降 56.05%,TP 降 21.38%)后回升;生活源 TN、TP 排放量下降 24.58%;农田固废排放稳定。空间上,TN、TP 高值区集中于运城、临汾、太原及晋中,显著高于上游生态敏感区。

(2)流域污染风险呈现等级-类型双重分异,划分为 3 个一级区、9 个二级区,涵盖 6 类污染源。空间分异显示:上游及中下游以均质化低风险(Ⅰ级)为主;中上游与下游呈单一污染主导型(化肥贡献率突出),风险等级集中于Ⅱ~Ⅲ级。

3)基于风险异质性提出分级防控路径:高风险区构建“源头-过程-末端”三级体系;中风险区强化源头防控与种养循环耦合;低风险区聚焦生态修复与预防性管控长效机制。

引用本文:

宋彩云,张鹏飞,李晓璐,等 . 汾河流域农业面源污染时空分布特征及潜在风险分区[J]. 农业环境科学学报, 2026, 45(3):717-726.

SONG C Y, ZHANG P F, LI X L, et al. Spatial and temporal characteristics and potential risks of agricultural surface pollution in Fenhe River basin[J]. Journal of Agro-Environment Science, 2026, 45(3):717-726.

编辑:宋潇

校对 | 审核:潘淑君  王农

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  1. CONNECT:[ UseTime:0.000560s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000556s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000330s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.003282s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000750s ]
  6. SELECT * FROM `set` [ RunTime:0.000355s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000768s ]
  8. SELECT * FROM `article` WHERE `id` = 526144 LIMIT 1 [ RunTime:0.000522s ]
  9. UPDATE `article` SET `lasttime` = 1778936885 WHERE `id` = 526144 [ RunTime:0.002147s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000269s ]
  11. SELECT * FROM `article` WHERE `id` < 526144 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000503s ]
  12. SELECT * FROM `article` WHERE `id` > 526144 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.004461s ]
  13. SELECT * FROM `article` WHERE `id` < 526144 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003880s ]
  14. SELECT * FROM `article` WHERE `id` < 526144 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001043s ]
  15. SELECT * FROM `article` WHERE `id` < 526144 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003375s ]
0.104541s