琼江干流遂宁段及主要支流水质时空变化规律
Spatial-temporal Variation of Water Quality in the Suining Section of Qiongjiang River and Its Primary Tributaries
投稿时间:2020-09-03  修订日期:2022-03-24
中文关键词:琼江流域  水质现状  时空变化  水期
英文关键词:Qiongjiang River basin  water quality status  spatial-temporal distribution  water level period
基金项目:四川省省级科技计划项目(2018SZYZF0001)
作者单位
唐 琦 四川大学 水力学与山区河流开发保护国家重点实验室四川 成都 610065 
刘 兵 遂宁市生态环境安全应急中心四川 遂宁 629000 
杨永安 四川省遂宁生态环境监测中心站四川 遂宁 629000 
郑宇杰 遂宁市生态环境安全应急中心四川 遂宁 629000 
童任涛 遂宁市生态环境安全应急中心四川 遂宁 629000 
王远铭 四川大学 水力学与山区河流开发保护国家重点实验室四川 成都 610065 
李克锋 四川大学 水力学与山区河流开发保护国家重点实验室四川 成都 610065 
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中文摘要:
      为探讨琼江流域遂宁段水质现状,在研究区域设定13个水质监测断面,选用具有代表性的水质因子化学需氧量(CODCr)、氨氮(NH3-N)和总磷(TP),按照《地表水环境质量》(GB 3838-2002)Ⅲ类水质标准,解析琼江干流遂宁段及主要支流水质的时空变化规律,采用双因素方差分析法,探究流域水质受河流断面和典型水期的影响特征。结果表明,干流水质不稳定,部分月份存在CODCr、TP超标现象;干流水质呈逐年好转的趋势,监测期间CODCr达标率由50.0%增长至68.3%,TP达标率由45.8%增长至83.7%;干流CODCr和TP浓度沿程变化趋势不显著,流经安居城区以及支流石洞河汇入后,NH3-N浓度均出现明显的升高和降低趋势(P<0.05);主要支流水质较差,河口断面达标率仅31.3%~52.6%,水质同样受CODCr和TP的影响;支流蟠龙河CODCr和TP均表现出枯水期水质显著劣于丰水期(P<0.05),但整体水质无明显年际变化趋势。研究结果对深入认识琼江流域水质现状具有重要意义,可为水污染治理提供基础数据与理论支撑。
英文摘要:
      Based on monthly monitoring data of water quality in the main stem and primary tributaries of the Suining section of Qiongjiang River, we characterized the water quality and spatial-temporal variations in water quality. Thirteen monitoring sites and three representative water quality parameters (CODCr, NH3-N and TP) were selected, based on historical water quality monitoring data and the Class Ⅲ Environmental Quality Standard for Surface Water (GB 3838-2002). The influence of river segment conditions and water level period on water quality was analyzed by two-way analysis of variance (ANOVA). Water quality on the main stem was variable, but was trending toward better water quality. CODCr and TP concentrations exceeded the Class Ⅲ standard in some months, while NH3-N concentration was low in most months, slightly exceeding Class Ⅲ standard. The compliance rate for CODCr increased from 50.0% to 68.3% and, for TP, from 45.8% to 83.7%, but their concentrations did not change significantly in the main stem. The NH3-N concentration clearly increased as Qiongjiang River flowed through Anju City and decreased significantly after receiving the flow of Shidong River (P<0.05). Water quality in the four tributaries was poor, primarily a result of high CODCr and TP levels, and compliance rates were low at their confluences, ranging from 31.3% to 52.6%. The CODCr and TP of Panlong River were both higher in dry season than in wet season, and there was no evident improvement of water quality in Panlong River, except in the Paomatan segment. These results clearly indicate the status of water quality in the Qiongjiang River basin, and provide data that can improve control of water pollution.
唐 琦,刘 兵,杨永安,郑宇杰,童任涛,王远铭,李克锋.2022.琼江干流遂宁段及主要支流水质时空变化规律[J].水生态学杂志,43(2):9-18.
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