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| 长兴湖水华期间水污染问题分析及对策研究 |
| Analysis and Countermeasures of Water Pollution during Algal Bloom in Changxing Lake |
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| DOI： |
| 中文关键词: 水质 底泥污染 来源分析 蓝藻水华 长兴湖 |
| 英文关键词: Water quality Sediment pollution 〖JP3〗Source analysis Cyanobacteria bloom Changxing Lake |
| 基金项目:国家自然科学基金资助项目（42277494）；湖南省重点研发计划基金资助项目（2023SK2062）；长沙市自然科学基金资助项目（kq2208137） |
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| 中文摘要: |
| 为研究长兴湖水华期水污染现状及成因，采用单因子指数法、内梅罗污染指数法和综合污染指数法对水质状况和底泥污染进行评价。结果表明，长兴湖水体中总氮（TN）和总磷（TP）均值分别为149 mg/L和024 mg/L，单因子污染指数分别为149和024，分属地表水质量Ⅳ类和劣Ⅴ类水质；内梅罗污染指数显示TN、TP分别达到159、158，均评价为差；综合污染指数表明水体整体处于中度污染水平，主要污染源为长兴湖相连水域（工业园沟渠）及渭川河中的N、P。Pearson相关性分析显示，N是长兴湖藻类生长的限制因素，TN主要源自外源污染，TP与湖内表层底泥磷营养盐释放相关。 |
| 英文摘要: |
| The water quality and sediment pollution were evaluated by single factor index method， Nemerow pollution index and comprehensive pollution index. The current situation and causes of water pollution during algal bloom in Changxing Lake were studied. The results showed that the mean concentration of total nitrogen（TN） and total phosphorus（TP）in Changxing Lake was 1.49 mg/L and 0.24 mg/L， respectively， and single factor pollution index was 1.49 and 0.24， respectively， which belonging to Class Ⅳ and lower Ⅴ surface water quality. Nemerow pollution index for TN and TP reached 1.59 and 1.58， respectively， both were evaluated as poor. The comprehensive pollution index indicated that the overall water body was at a moderate level of pollution， 〖JP2〗the main pollutants were nitrogen and phosphorus from the ditches of the industrial park connected with Changxing Lake and Weichuan River. Pearson correlation analysis revealed that nitrogen restricted the growth of algae in Changxing Lake. TN mainly originated from 〖GK!86mm〗external pollution， and TP was related to the release of phosphorus nutrients from surface sediment in the lake. |
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