| “引江济太”对2016年后太湖总磷反弹的直接影响分析 |
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| 引用本文： | 朱伟,薛宗璞,章元明,翟淑华,冯甘雨,王若辰,陈怀民,胡思远,赵帅,周娅.“引江济太”对2016年后太湖总磷反弹的直接影响分析[J].湖泊科学,2020,32(5):1432-1445. |
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| 作者姓名： | 朱伟 薛宗璞 章元明 翟淑华 冯甘雨 王若辰 陈怀民 胡思远 赵帅 周娅 |
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| 作者单位： | 河海大学环境学院,南京210098;河海大学水文水资源学院,南京210098;太湖流域水资源保护局,上海200080 |
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| 基金项目： | 江苏省科技计划项目（BE2018737）和中央高校建设世界一流大学（学科）和特色发展引导专项资金项目联合资助. |
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| 摘 要： | 针对“引江济太”工程将总磷浓度偏高的长江水引入太湖后对2016年后太湖总磷反弹的影响，本文实测并收集整理了2016年前后“引江济太”调水入湖水量、磷通量及全太湖入湖水量、磷通量与太湖磷存量等数据，对2016年前后“引江济太”调水入湖水量、磷通量、磷形态与其他入湖河道水量、磷通量、磷形态以及全太湖的水质、受水区贡湖的水质进行了分析.结果表明：2016年前后，“引江济太”年均入湖磷通量为97.56 t，年均入湖水量为8.16亿m3，从调水量、入湖磷通量、调水后短期磷响应及各湖区磷增量来看，“引江济太”与2016年后太湖总磷反弹相关性不强.“引江济太”调水累计入湖磷通量为877.97 t，占太湖总入湖磷通量的4.58%，累计入湖水量占太湖累计入湖水量的7.36%，单位水量携带的磷通量仅为其他来水的一半左右，占比相对有限.与太湖主要入湖河流相比，“引江济太”调水属于优质来水，湖泊的入湖河流总磷浓度一般都高于湖泊本身的总磷浓度，“引江济太”调水总磷浓度偏高属于正常范围.目前“引江济太”工程在保证供水安全、缓解水华危机的同时对处于严重富营养化状态的太湖具有一定的改善效果，但未来引水量增加的情况下，必须继续关注引水带来的磷通量与太湖磷循环系统的关系，确保“引江济太”对太湖继续产生良性的影响.
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| 关 键 词： | 太湖 “引江济太” 磷 入湖通量 磷反弹 |
| 收稿时间： | 2020/2/21 0:00:00 |
| 修稿时间： | 2020/3/27 0:00:00 |
Effect of water diversion from the Yangtze River to Lake Taihu on total phosphorus rebound after 2016 |
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| ZHU Wei,XUE Zongpu,ZHANG Yuanming,ZHAI Shuhu,FENG Ganyu,WANG Ruochen,CHEN Huaimin,HU Siyuan,ZHAO Shuai,ZHOU Ya.Effect of water diversion from the Yangtze River to Lake Taihu on total phosphorus rebound after 2016[J].Journal of Lake Science,2020,32(5):1432-1445. |
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| Authors: | ZHU Wei XUE Zongpu ZHANG Yuanming ZHAI Shuhu FENG Ganyu WANG Ruochen CHEN Huaimin HU Siyuan ZHAO Shuai ZHOU Ya |
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| Institution: | College of Environment, Hohai University, Nanjing 210098, P. R. China;College of Hydrology and Water Resources, Hohai University, Nanjing 210098, P. R. China;Taihu Basin Water Resources Protection Bureau, Shanghai 200080, P. R. China |
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| Abstract: | In order to figure out the influence of the water diversion from the Yangtze River Project (WDP) on the rebound of total phosphorus (TP) concentration in Lake Taihu after 2016,this study analyzed the water quantity, phosphorus flux and phosphorus form of Yangtze River and other inflowing rivers including Lake Taihu and Gonghu Bay around 2016 based on the data of water quantity, phosphorus flux transfer from Yangtze River and the phosphorus stock in the lake. The result shows that the average annual phosphorus flux into the lake was 97.56 t and the average annual water inflow volume was 816 million m3 around 2016. From the perspective of water volume, phosphorus flux into the lake, short-term phosphorus response after water diversion and phosphorus increment in each lake area, the correlation between the WDP and the TP rebound in the lake after 2016 is not strong. The cumulative phosphorus flux from the WDP was 877.97 t, accounting for 4.58% of the total TP flux into the lake, and the accumulative amount of lake water accounted for 7.36% of the accumulative amount of lake water in Lake Taihu, the phosphorus flux per unit of water is only about half of that of other water, which accounts for a relatively limited proportion. Compared with the main inflow rivers of Lake Taihu, the water quality from Yangtze River is good. The TP concentration in the inflow rivers is generally higher than the TP concentration of the lake itself. At present, in addition to ensuring the safety of water supply and alleviating the water bloom crisis, the incoming water from the WDP has certain improvement effect when the lake is serious eutrophic. In the next step, we must pay attention to the relationship between the phosphorus flux brought by water diversion and the phosphorus circulation system in Lake Taihu, so as to ensure the ongoing WDP continue to have a positive impact. |
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| Keywords: | Lake Taihu water diversion from the Yangtze river Project phosphorus flux of lake inflow total phosphorus rebound |
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