CAJ | 학술논문

基于2006-2013年对长江上游珍稀特有鱼类国家级自然保护区水环境因子的监测数据，对区域内长江干流和赤水河的水环境因子时空分布特征进行了比较分析。结果显示，保护区水体总氮含量较高，长江干流总氮含量在0.5～1.5 mg/L的范围内波动，而赤水河的总氮总体超过2.5 mg/L。空间上，长江干流水温、溶解氧、氨氮和总磷含量高于赤水河，而总氮和硝态氮含量低于赤水河。在长江干流，溶解氧自上游至下游逐渐降低，总氮和硝态氮则自上而下平缓升高。赤水河水温自上而下逐渐升高，而溶解氧、总氮和硝态氮均显示出自上而下逐渐降低的趋势。时间上，总氮和硝态氮逐年上升，氨氮在长江干流逐年下降。基于各水质因子对样点的聚类分析表明，长江干流与赤水河呈现出明显的差异；河流内部空间距离越近，各样点的水环境相似程度越高，甚至分处向家坝水电站上下游的两个断面被发现亦具有较高的相似性，表明在研究期间较低的监测频率下，这两个断面并未因大坝的阻隔显示出上述水环境因子的显著差异。
기우2006-2013년대장강상유진희특유어류국가급자연보호구수배경인자적감측수거，대구역내장강간류화적수하적수배경인자시공분포특정진행료비교분석。결과현시，보호구수체총담함량교고，장강간류총담함량재0.5～1.5 mg/L적범위내파동，이적수하적총담총체초과2.5 mg/L。공간상，장강간류수온、용해양、안담화총린함량고우적수하，이총담화초태담함량저우적수하。재장강간류，용해양자상유지하유축점강저，총담화초태담칙자상이하평완승고。적수하수온자상이하축점승고，이용해양、총담화초태담균현시출자상이하축점강저적추세。시간상，총담화초태담축년상승，안담재장강간류축년하강。기우각수질인자대양점적취류분석표명，장강간류여적수하정현출명현적차이；하류내부공간거리월근，각양점적수배경상사정도월고，심지분처향가패수전참상하유적량개단면피발현역구유교고적상사성，표명재연구기간교저적감측빈솔하，저량개단면병미인대패적조격현시출상술수배경인자적현저차이。
The spatial and temporal distributions of the water environment factors in the National Nature Reserve for the Rare and Endemic Fishes in the Upper Reaches of the Yangtze River were analyzed based on the monitoring data from 2006 to 2013 .High total nitrogen ( TN) content was found in the water of the conservation area .TN in the mainstream of the Yangtze River ranged from 0.5 to 1.5 mg/L.Average TN content in the Chishui River exceeded 2.5 mg/L.Spatially, water temperature (WT), dissolved oxygen (DO), ammonia nitrogen (NH4-N), total phosphorus (TP) in the main-stream was higher than that in the Chishui River , while TN and nitrite nitrogen (NO 3-N) was lower .In the mainstream of the Yangtze River, DO decreased from the upstream to the downstream , and TN and NO3-N increased slowly from the up-stream to the downstream.In the Chishui River, WT increased from the upstream to the downstream , while DO, TN and NO3-N showed the opposite trend .Temporally, TN and NO3-N increased in recent years , while NH4-N decreased in the mainstream of the Yangtze River .Other factors did not show regular change .The cluster analysis based on the water envi-ronmental factors showed that , obvious difference existed between the Yangtze River mainstream and the Chishui River .In each river, the sites close to each other showed higher similarity .Even the two sites which located at upstream and down-stream of the Xiangjiaba Dam respectively displayed higher similarity .This indicated the water environment factors men-tioned above did not show obvious difference due to the separation of the dam under the low -frequency monitoring during the study period .