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西南喀斯特典型农业流域水质污染特征和源解析

  • 2026-02-14 09:22:27
西南喀斯特典型农业流域水质污染特征和源解析

来源:《农业环境科学学报》2026年1期

作者:范1,2,3,遆超普1,3,严星1,3,韩豪杰1,2,3,邱捷1,2,3,王瑞刚4,刘岩5,徐如林6,戚彩琼6,何6,颜晓元1,3,7,夏永秋1,3,7*

单位1.国科学南京土壤研究所;2.国科学大学;3.国科学常熟农生态实验4.广东省科学生态环境土壤研究所;5.普标检测科技(天津)有限公司;6.丘北县农农村环境及能技术服务心;7.国科学大学南京学

摘要
为揭示流域水质的时空分布特征及其污染来源,本研究以我国西南典型喀斯特农业流域——普者黑流域为对象,基于2022—2023年采集的448个地表水样本,结合多元统计分析与正定矩阵因子分解(PMF)模型进行研究。结果表明:流域水体污染以氮、磷和有机污染物为主,各水质指标随时间和空间变化呈现出不同的分布特征。总氮(TN)和NO3--N浓度在雨季较高,主要受降雨径流的影响;总磷(TP)和NH4+-N浓度在旱季偏高,与畜禽养殖和生活污水排放相关;化学需氧量(COD)和粪大肠菌群(FC)浓度在旅游旺季升高,表明旅游活动是影响水质的主要因素。PMF模型结果表明,流域内主要污染源可以分为4类,其贡献依次为生活源(35.3%)、肥料源(28.6%)、养殖源(19.1%)和旅游活动源(17.0%),上述4类污染源在空间上表现出明显的分布差异。研究表明,加强农田肥料流失管控、养殖废水管理以及旅游季节生活污水处理,是喀斯特农业流域水质长效保护的关键。
结论
1)研究区各水质指标随时间和空间变化呈现出不同的分布特征。TNNO3--N浓度在雨季升高,受降径流影响;TPNH4+-N浓度旱季偏高,畜禽养和生活污水排放相关;CODFC浓度旅游旺季较高,表明旅游活动影响湖泊水质。

2Pearson相关性分析和PCA 结果表明,TNNO3--N呈显著正相关,表明NO3--N是流域氮污染的形式;NH4+-NClFC 3标的同性表明生活污水和养废水是其主要源。PCA提取的3成分累计解释方差为81.05%,进步明确了农活动生活污水及有机物输入是影响水主要驱动因素

3PMF模型解析结果显示,研究区主要污染来可以归纳为4个因子:畜禽养19.1%施肥(28.6%生活污水(35.3%)和旅游活动(17.0%),且各污染因子具有空间异质

引用本文:

范珍,遆超普,严星,等. 西南喀斯特典型农业流域水质污染特征和源解析[J]. 农业环境科学学报, 2026, 45(1):156-167.

FAN Z, TI C P, YAN X, et al. Water quality pollution characteristics and source apportionment in a typical karst agricultural watershed of southwest China[J]. Journal of Agro-Environment Science, 2026, 45(1):156-167.

编辑:宋潇

校对 | 审核:潘淑君  王农

农业环境科学 / 推荐阅读

洱海流域土地利用冲突时空演变及多情景模拟预测

封面文章丨汉江流域安康段径流和泥沙对土地利用变化的响应

基于生态系统服务功能的伊犁河流域农业土壤质量时空变化特征

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  1. CONNECT:[ UseTime:0.000980s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001553s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001515s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001208s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001418s ]
  6. SELECT * FROM `set` [ RunTime:0.002371s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001563s ]
  8. SELECT * FROM `article` WHERE `id` = 474784 LIMIT 1 [ RunTime:0.002002s ]
  9. UPDATE `article` SET `lasttime` = 1771080671 WHERE `id` = 474784 [ RunTime:0.001957s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000753s ]
  11. SELECT * FROM `article` WHERE `id` < 474784 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.061423s ]
  12. SELECT * FROM `article` WHERE `id` > 474784 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.042175s ]
  13. SELECT * FROM `article` WHERE `id` < 474784 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.118565s ]
  14. SELECT * FROM `article` WHERE `id` < 474784 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.013740s ]
  15. SELECT * FROM `article` WHERE `id` < 474784 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.024549s ]
0.438688s