| 摘要: |
| 为全面掌握汉江襄阳城区段沿程水质变化情况，合理制定相应保护措施，基于2018—2022年汉江襄阳城区段出入境断面及支流水质监测数据，对汉江襄阳城区段水环境质量、变化趋势和相关特征开展综合分析评价。结果表明，2018—2022年汉江襄阳城区段入境与出境断面水质状况总体为优，但出境断面氨氮、总磷、总氮的质量浓度较入境断面均有明显增高，主要支流唐白河、清河及南渠的汇入对出境断面水质影响较大。2018—2021年汉江襄阳城区段出入境断面主要监测指标质量浓度分布表现为丰水期＞枯水期，2022年表现为枯水期＞丰水期。汉江襄阳城区段水质氮污染贡献明显高于磷污染，仍以氮污染为主，水质中氮主要以游离氨和铵盐以外的形式存在。相关性分析结果表明，入境断面与出境断面中氨氮、总氮与各指标相关性差别较大，总磷、溶解氧与各参数间的相关性基本一致。研究结果可为制定汉江水环境改善及污染防治措施提供科学依据。 |
| 关键词: 汉江襄阳段 水质 变化规律 氮磷 相关性 |
| DOI：DOI：10.3969/j.issn.1674-6732.2024.02.013 |
| 分类号:X824 |
| 基金项目:湖北省环保科研基金资助项目（2021HB-ZC02） |
|
| Analysis of Water Quality Changes and Characteristics in Xiangyang Urban Section of the Han River |
|
LUO Dewei， HU Qinqin， XU Wen， YANG Ying
|
|
Xiangyang Ecological Environmental Monitoring Center， Department of Ecology and Environment of Hubei Province， Xiangyang， Hubei 441000， China
|
| Abstract: |
| In order to comprehensively grasp the changes of water quality along the Han River after it enters and leaves Xiangyang urban area， and reasonably formulate corresponding protection measures， a comprehensive analysis and evaluation of the water environment quality， change trend and related characteristics of Xiangyang section of Han River is carried out based on the water quality monitoring data of the exit section， entry section and tributaries of Xiangyang urban section of Han River from 2018 to 2022. The results showed that the water quality of exit and entry sections of Xiangyang urban section of the Han River from 2018 to 2022 was generally good， but the main indices of ammonia nitrogen， total phosphorus and total nitrogen in exit sections were significantly higher than those in entry sections， and the inflow of major tributaries Tangbai River， Qing River and Nanqu River had a greater impact on the water quality of exit sections. From 2018 to 2021， the concentrations of the main monitoring indicators during the water period were greater than those in the dry period， while that were quite the reverse in 2022. The contribution of nitrogen pollution to water quality in Xiangyang urban section of Han River was obviously higher than that of phosphorus pollution， which was still mainly nitrogen pollution， and nitrogen in water quality mainly exists in forms other than free ammonia and ammonium salt. The correlation analysis results showed that the correlation between ammonia nitrogen and the other indicators in entry sections was inconsistent with that in exit sections， the same inconsistence was observed between total nitrogen and the other indicators. While the correlation between total phosphorus and dissolved oxygen and other parameters were basically consistent. The results can provide scientific basis for the improvement of water environment and pollution control measures of Han River. |
| Key words: Xiangyang section of the Han River Water quality Variation rule Nitrogen and phosphorus Correlation |
