| 张书滨,周涵杰,谢千辰,唐 明.鄱阳湖入江水道总磷时空分布规律及采砂影响简析[J].江西水利科技,2021,(6): |
| 鄱阳湖入江水道总磷时空分布规律及采砂影响简析 |
| Spatial-temporal distribution of total phosphorus in the channel from Poyang Lake to the Yangtze River and the influence of sand mining on it |
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| DOI： |
| 中文关键词: 总磷 时程分布 空间分布 采砂影响 鄱阳湖入江水道 |
| 英文关键词: Total phosphorus Temporal distribution Spatial distribution The influence of sand mining The channel from Poyang Lake to the Yangtze River |
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| 中文摘要: |
| 为了探讨鄱阳湖入江水道的总磷时空分布规律，区分水文自然节律与采砂影响的主次关系，结合区间纳污情况，对老爷庙、星子及蛤蟆石断面的总磷监测数据进行了时空变化的数理统计分析。结果表明：由于入湖水量差异导致水体自净能力与纳污能力的变化，鄱阳湖入江水道主要断面的总磷指标存在“丰水期优于枯水期”的周期性波动规律；老爷庙-星子段总磷浓度总体呈现优化趋势；星子-蛤蟆石段则呈劣化趋势；鄱阳湖采砂相关作业对断面水质存在一定的影响，但其本质是底泥扰动带来的内源性污染迁移，其影响较入湖排污带来的外源性污染要小。研究结果有助于更加理性地分析采砂对水质的影响。 |
| 英文摘要: |
| To explore the Spatial-temporal distribution of total phosphorus in the channel from Poyang Lake to the Yangtze River,and identify the main influence factors on the water quality between the hydrological natural rhythm and sand mining,the temporal and spatial variation of the total phosphorus monitoring data of Laoyemiao,Xingzi and Hamashi were statistically analyzed,combined with the regional pollution acceptance.The results show that：（1）due to the different amount of water entering the lake,the self purification capacity and pollutant carrying capacity of the water body change,which leads to the periodic fluctuation law of the total phosphorus index of the main section in the channel from Poyang Lake to the Yangtze River,that is to say the index in the wet season is better than that in the dry season;（2）from Laoyemiao to Xingzi,the total phosphorus concentration shows an optimization trend;the same indicator from Xingzi to Hamashi shows a deterioration trend;（3）sand mining in Poyang Lake has some impact on the section water quality,but its essence is the migration of endogenous pollution caused by sediment disturbance,and its impact is smaller than exogenous pollution discharged into the lake.The above conclusions are helpful to rationally analyze the impact of sand mining on water quality. |
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