Zhang Yinghao, Wang Dianchang, Wu Xinghua, Lai Xijun
{"title":"Driving factors of wetland evolution in Lake Dongting during 1900-2020","authors":"Zhang Yinghao, Wang Dianchang, Wu Xinghua, Lai Xijun","doi":"10.18307/2023.0541","DOIUrl":"https://doi.org/10.18307/2023.0541","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yang Yongrui, Shi Jianchao, Yi Qitao, Zhang Jin, Wang Lianxiang
{"title":"Variation analysis of source and composition of CDOM in a source water reservoir of Yellow River diversion project during normal and wet seasons","authors":"Yang Yongrui, Shi Jianchao, Yi Qitao, Zhang Jin, Wang Lianxiang","doi":"10.18307/2023.0524","DOIUrl":"https://doi.org/10.18307/2023.0524","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Water and sediment changes and the eco-environment response characteristics in Three Gorges Reservoir after the impoundment","authors":"Lin Li, D. Lei, Pan Xiong, Yang Wenjun","doi":"10.18307/2023.0204","DOIUrl":"https://doi.org/10.18307/2023.0204","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67482783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yang Yunping, Zhou Liangping, Zhang Huaqing, Feng Xiaoxiang, Zhu Lingling, Liu Wanli, Li-Xiao Ming, Wang Jianjun
{"title":"Water depth resources and driving mechanism of navigation hindrance of Jingjiang Reach watershed after Three Gorges Project operation","authors":"Yang Yunping, Zhou Liangping, Zhang Huaqing, Feng Xiaoxiang, Zhu Lingling, Liu Wanli, Li-Xiao Ming, Wang Jianjun","doi":"10.18307/2023.0224","DOIUrl":"https://doi.org/10.18307/2023.0224","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67483316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wen Shuke, Peng Kai, Gong Zhijun, Qin Boqiang, Cai Yongjiu
{"title":"Succession of macrozoobenthic communities and its drivers in Meiliang Bay of Lake Taihu during the past 40 years","authors":"Wen Shuke, Peng Kai, Gong Zhijun, Qin Boqiang, Cai Yongjiu","doi":"10.18307/2023.0217","DOIUrl":"https://doi.org/10.18307/2023.0217","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67483446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xiaolong Yang, Liu Lihua, Yonghong Bi, Wang Xun, Dongmin Wei, Deng Zifa, Shoubing Wang
{"title":"Progress on photosynthetic nitrogen assimilation and its regulatory mechanisms in cyanobacteria","authors":"Xiaolong Yang, Liu Lihua, Yonghong Bi, Wang Xun, Dongmin Wei, Deng Zifa, Shoubing Wang","doi":"10.18307/2023.0301","DOIUrl":"https://doi.org/10.18307/2023.0301","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67484025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Characteristics and biogeochemical implications of C25 highly branched isoprenoids (HBIs) in surface sediments of Lake Erhai in Yunnan Province","authors":"Cai Luyi, Z. Can, He Yuxin","doi":"10.18307/2023.0312","DOIUrl":"https://doi.org/10.18307/2023.0312","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67484136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Liu Yang, Li Zhengfei, Bao Shaopan, Ge Yihao, Liu Zhenyuan, Xie Zhicai, Zhang Junqian
{"title":"Community succession and mechanisms of community assembly of macroinvertebrates over the past three decades in Lake Baoan","authors":"Liu Yang, Li Zhengfei, Bao Shaopan, Ge Yihao, Liu Zhenyuan, Xie Zhicai, Zhang Junqian","doi":"10.18307/2023.0433","DOIUrl":"https://doi.org/10.18307/2023.0433","url":null,"abstract":"","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67486700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
近70年来荆江三口分流持续减少,为分析各历史阶段三口分流变化的驱动因素,根据1955—2021年干支流水文、地形实测资料开展研究,并基于控制变量法识别各驱动因素贡献比例。结果表明:三口分流阶段性减少,且集中在5—11月。长江上游降雨减少导致的干流来流偏枯以及下荆江裁弯、葛洲坝拦沙造成的干流河道冲刷和三口口门淤积对三口分流减少促进作用明显,调弦口堵口对三口分流影响不大,三峡水库蓄水后干流河道与三口口门同步冲刷,三口分流变化不大。长江上游汛期降雨减少明显,对5—11月三口分流减少影响较大,且三口分流主要发生于汛期干流中洪水位时,导致在下荆江裁弯期干流河床大幅下切条件下5—11月分流显著减少;葛洲坝调度、三峡水库初期调度和试验性蓄水调度也集中于5—11月,使得5—11月三口分流量分别减小0.4×108、12.5×108和38.6×108 m3。调弦口堵口对三口分流的增大作用远小于降雨的减小作用,贡献比例为负值;下荆江裁弯对三口分流减少的贡献比例达85%;水库运用期降雨对三口分流减少的贡献最大,贡献比例大于50%,葛洲坝调度几乎不产生贡献、下游河道调整贡献比例为21%,三峡水库初期调度贡献比例增大至7%、下游河道调整贡献比例为10%,试验性蓄水期则分别上升至23%和19%。长江上游降雨减少至少持续到本世纪末,三口分流年均值将长期呈减少趋势,而荆江干流与三口口门同步冲刷,干流同流量下三口分流仍将变化不大。;Over the past 70 years, the water diversion at the three outlets of the Jingjiang River has been continuously decreasing. In order to investigate the driving factors at different historical stages, this study used the measured hydrological data of the hydrology and topographic features of the mainstream and tributaries from 1955 to 2021, and identified the contributions of the factors based on the variable control approach. The results showed that the water diversion had gradually decreased, and the decrease had mainly occurred from May to November. The decrease in water diversion was greatly aggravated by the reduced mainstream inflow due to the decrease in precipitation in the upper Yangtze, and the erosion of the mainstream bed and deposition at the three outlets caused by the dam projects in the lower Jingjiang River and the sediment trap in the Gezhouba. However, the Tiaoxiankou dam had little effect on water diversion. Since the damming of the Three Gorges Reservoir (TGR), the mainstream and the three tributaries had experienced synchronous riverbed erosion, resulting in an imperceptible change in water diversion. The reduction in rainfall had been concentrated in the rainy season, which had had a major impact on the reduction in water diversion from May to November. Meanwhile, water diversion was mainly concentrated in the rainy season when the mainstream was at flood level, resulting in a large decrease in water diversion from May to November, while the Lower Jingjiang Cutoff Projects triggered a large lowering of the mainstream riverbed. In addition, the operation of Gezhouba, the initial damming of TGR and the experimental damming of TGR were mainly carried out from May to November, reducing water diversion by 0.4×108 m3, 12.5×108 m3 and 38.6×108 m3, respectively. The enabling effect of the Tiaoxiaokou dam on water diversion was far less than the constraining effect of rainfall reduction, resulting in a negative contribution ratio for the dam. In comparison, the contribution ratio of the lower Jingjiang dam projects reached 85%. In the post-dam period, precipitation dominated water diversion reduction with a contribution ratio of more than 50%, while Gezhouba operation hardly played a role and its downstream riverbed adjustment prod
近70年来荆江三口分流持续减少,为分析各历史阶段三口分流变化的驱动因素,根据1955—2021年干支流水文、地形实测资料开展研究,并基于控制变量法识别各驱动因素贡献比例。结果表明:三口分流阶段性减少,且集中在5—11月。长江上游降雨减少导致的干流来流偏枯以及下荆江裁弯、葛洲坝拦沙造成的干流河道冲刷和三口口门淤积对三口分流减少促进作用明显,调弦口堵口对三口分流影响不大,三峡水库蓄水后干流河道与三口口门同步冲刷,三口分流变化不大。长江上游汛期降雨减少明显,对5—11月三口分流减少影响较大,且三口分流主要发生于汛期干流中洪水位时,导致在下荆江裁弯期干流河床大幅下切条件下5—11月分流显著减少;葛洲坝调度、三峡水库初期调度和试验性蓄水调度也集中于5—11月,使得5—11月三口分流量分别减小0.4×108、12.5×108和38.6×108 m3。调弦口堵口对三口分流的增大作用远小于降雨的减小作用,贡献比例为负值;下荆江裁弯对三口分流减少的贡献比例达85%;水库运用期降雨对三口分流减少的贡献最大,贡献比例大于50%,葛洲坝调度几乎不产生贡献、下游河道调整贡献比例为21%,三峡水库初期调度贡献比例增大至7%、下游河道调整贡献比例为10%,试验性蓄水期则分别上升至23%和19%。长江上游降雨减少至少持续到本世纪末,三口分流年均值将长期呈减少趋势,而荆江干流与三口口门同步冲刷,干流同流量下三口分流仍将变化不大。;Over the past 70 years, the water diversion at the three outlets of the Jingjiang River has been continuously decreasing. In order to investigate the driving factors at different historical stages, this study used the measured hydrological data of the hydrology and topographic features of the mainstream and tributaries from 1955 to 2021, and identified the contributions of the factors based on the variable control approach. The results showed that the water diversion had gradually decreased, and the decrease had mainly occurred from May to November. The decrease in water diversion was greatly aggravated by the reduced mainstream inflow due to the decrease in precipitation in the upper Yangtze, and the erosion of the mainstream bed and deposition at the three outlets caused by the dam projects in the lower Jingjiang River and the sediment trap in the Gezhouba. However, the Tiaoxiankou dam had little effect on water diversion. Since the damming of the Three Gorges Reservoir (TGR), the mainstream and the three tributaries had experienced synchronous riverbed erosion, resulting in an imperceptible change in water diversion. The reduction in rainfall had been concentrated in the rainy season, which had had a major impact on the reduction in water diversion from May to November. Meanwhile, water diversion was mainly concentrated in the rainy season when the mainstream was at flood level, resulting in a large decrease in water diversion from May to November, while the Lower Jingjiang Cutoff Projects triggered a large lowering of the mainstream riverbed. In addition, the operation of Gezhouba, the initial damming of TGR and the experimental damming of TGR were mainly carried out from May to November, reducing water diversion by 0.4×108 m3, 12.5×108 m3 and 38.6×108 m3, respectively. The enabling effect of the Tiaoxiaokou dam on water diversion was far less than the constraining effect of rainfall reduction, resulting in a negative contribution ratio for the dam. In comparison, the contribution ratio of the lower Jingjiang dam projects reached 85%. In the post-dam period, precipitation dominated water diversion reduction with a contribution ratio of more than 50%, while Gezhouba operation hardly played a role and its downstream riverbed adjustment produced a contribution ratio of 21%. During the initial and experimental damming of the TGR, the contribution rat
{"title":"Variations in water diversion at three outlets to Lake Dongting from Jingjiang River based on the identification of multiple factor contributions since 1955","authors":"Zhu Boyuan, Xu Qi, Zhu Lingling, Li Yitian","doi":"10.18307/2023.0545","DOIUrl":"https://doi.org/10.18307/2023.0545","url":null,"abstract":"近70年来荆江三口分流持续减少,为分析各历史阶段三口分流变化的驱动因素,根据1955—2021年干支流水文、地形实测资料开展研究,并基于控制变量法识别各驱动因素贡献比例。结果表明:三口分流阶段性减少,且集中在5—11月。长江上游降雨减少导致的干流来流偏枯以及下荆江裁弯、葛洲坝拦沙造成的干流河道冲刷和三口口门淤积对三口分流减少促进作用明显,调弦口堵口对三口分流影响不大,三峡水库蓄水后干流河道与三口口门同步冲刷,三口分流变化不大。长江上游汛期降雨减少明显,对5—11月三口分流减少影响较大,且三口分流主要发生于汛期干流中洪水位时,导致在下荆江裁弯期干流河床大幅下切条件下5—11月分流显著减少;葛洲坝调度、三峡水库初期调度和试验性蓄水调度也集中于5—11月,使得5—11月三口分流量分别减小0.4×10<sup>8</sup>、12.5×10<sup>8</sup>和38.6×10<sup>8</sup> m<sup>3</sup>。调弦口堵口对三口分流的增大作用远小于降雨的减小作用,贡献比例为负值;下荆江裁弯对三口分流减少的贡献比例达85%;水库运用期降雨对三口分流减少的贡献最大,贡献比例大于50%,葛洲坝调度几乎不产生贡献、下游河道调整贡献比例为21%,三峡水库初期调度贡献比例增大至7%、下游河道调整贡献比例为10%,试验性蓄水期则分别上升至23%和19%。长江上游降雨减少至少持续到本世纪末,三口分流年均值将长期呈减少趋势,而荆江干流与三口口门同步冲刷,干流同流量下三口分流仍将变化不大。;Over the past 70 years, the water diversion at the three outlets of the Jingjiang River has been continuously decreasing. In order to investigate the driving factors at different historical stages, this study used the measured hydrological data of the hydrology and topographic features of the mainstream and tributaries from 1955 to 2021, and identified the contributions of the factors based on the variable control approach. The results showed that the water diversion had gradually decreased, and the decrease had mainly occurred from May to November. The decrease in water diversion was greatly aggravated by the reduced mainstream inflow due to the decrease in precipitation in the upper Yangtze, and the erosion of the mainstream bed and deposition at the three outlets caused by the dam projects in the lower Jingjiang River and the sediment trap in the Gezhouba. However, the Tiaoxiankou dam had little effect on water diversion. Since the damming of the Three Gorges Reservoir (TGR), the mainstream and the three tributaries had experienced synchronous riverbed erosion, resulting in an imperceptible change in water diversion. The reduction in rainfall had been concentrated in the rainy season, which had had a major impact on the reduction in water diversion from May to November. Meanwhile, water diversion was mainly concentrated in the rainy season when the mainstream was at flood level, resulting in a large decrease in water diversion from May to November, while the Lower Jingjiang Cutoff Projects triggered a large lowering of the mainstream riverbed. In addition, the operation of Gezhouba, the initial damming of TGR and the experimental damming of TGR were mainly carried out from May to November, reducing water diversion by 0.4×10<sup>8</sup> m<sup>3</sup>, 12.5×10<sup>8</sup> m<sup>3</sup> and 38.6×10<sup>8</sup> m<sup>3</sup>, respectively. The enabling effect of the Tiaoxiaokou dam on water diversion was far less than the constraining effect of rainfall reduction, resulting in a negative contribution ratio for the dam. In comparison, the contribution ratio of the lower Jingjiang dam projects reached 85%. In the post-dam period, precipitation dominated water diversion reduction with a contribution ratio of more than 50%, while Gezhouba operation hardly played a role and its downstream riverbed adjustment prod","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hua Yingxiao, Pan Jizheng, Du Jinsong, Li Yang, Yang Qi, Xu Shuang, Huang Yuhong
大泊口位于滇池草海南部,水域面积0.52 km2,平均水深约2 m,作为滇池草海重富营养化水域生态修复示范区,大泊口分别于2015和2019年开展了两期生态修复工程,经过近年来的系统治理,大泊口水生态治理效果初步显现。为分析探究成功修复湖区水质改善、生态系统企稳向好的原因,本研究选择2015年2月-2021年12月共7年的连续监测数据,根据工程开展情况以及水生态状况将大泊口水域划分为4个部分(A1~A4水域),首先分析4个区域内主要的水质指标(悬浮物(SS)、化学需氧量(CODCr)、总磷(TP)、总氮(TN)和叶绿素a(Chl.a))的变化趋势和相关性,其次探究不同类型生态工程的修复效果,最后与草海和外海水域进行对比,分析大泊口的治理效果。结果表明,治理后大泊口A1~A4水域的CODCr、TP和Chl.a稳定下降,CODCr分别降低18.65、27.96、25.26、40.92 mg/L,TP分别降低0.11、0.10、0.11、0.14 mg/L,Chl.a分别降低0.037、0.068、0.067、0.106 mg/L,SS具有较强的季节性波动,TN仅有东南部A4水域表现出持续下降的趋势,平均下降0.68 mg/L。通过相关性分析得出,CODCr、TP与Chl.a的相关性最强,CODCr和TP可能是影响大泊口藻类生长的关键环境因子;大泊口开展的引水换水工程和微滤净化(除藻)工程,降低了营养盐浓度、加速了水体交换,进而降低了藻类生物量以及发生藻源性污染的风险,再通过沉水植物修复工程进一步净化水质,为形成稳定的草型湖泊提供条件,并且认为沉水植物修复工程是上述工程中最为直接、经济和长效的手段措施;最后将大泊口典型水域的水质和草海、外海水质进行比较,可以认为在相同的地理及气候条件下,大泊口东南水域的生态修复取得了一定的成功。大泊口部分湖区可作为重度富营养化藻型湖区成功修复的案例,其生态修复经验对于持续推进大泊口、草海甚至整个滇池的生态环境修复具有重要的借鉴和参考价值。;Dabokou is located in the south of Caohai, Lake Dianchi, with an area of 0.52 km2 and an average water depth of about 2 m. As a typical severely eutrophic lake, Dabokou has undergone two phases of ecological restoration in 2015 and 2019. In recent years, the effects of the restoration have begun to be seen. In order to analyse and explore the reasons for the improvement of water quality and ecosystem in the successful restoration waters, this study selected the continuous monitoring data from February 2015 to December 2021 and divided Dabokou into four parts from A1 to A4 according to the engineering situation and water ecological situation. Firstly, the change trends and correlations of suspended solids (SS), chemical oxygen demand (CODCr), total phosphorus (TP), total nitrogen (TN) and chlorophyll-a (Chl.a) in the four areas were analysed. Secondly, the restoration effects of different ecological projects were investigated. Finally, the restoration effects of Dabokou were analysed by comparing with Caohai and Waihai. The results showed that after treatment, CODCr, TP and Chl.a decreased stably from A1 to A4 area. CODCr decreased by 18.65, 27.96, 25.26, 40.92 mg/L; TP decreased by 0.11, 0.10, 0.11, 0.14 mg/L; Chl.a decreased by 0.037, 0.068, 0.067, 0.106 mg/L, respectively. SS showed strong seasonal variations and TN showed a continuous decreasing trend only in area A4, the south-eastern part of Dabokou, with a decrease of 0.68 mg/L. Correlation analysis showed that CODCr and TP had the strongest correlation with Chl.a, which could be the key factors affecting algal growth. The water diversion and exchange project reduced nutrient concentrations and accelerated water circulation, and the microfilter cleaning and algae removal project reduced algal biomass and the risk of algal pollution. And through the purification functions of submerged macrophytes, the plant restoration project provided conditions for the formation of the macrophyte-dominated state lake. It is considered that the plant restor
大泊口位于滇池草海南部,水域面积0.52 km2,平均水深约2 m,作为滇池草海重富营养化水域生态修复示范区,大泊口分别于2015和2019年开展了两期生态修复工程,经过近年来的系统治理,大泊口水生态治理效果初步显现。为分析探究成功修复湖区水质改善、生态系统企稳向好的原因,本研究选择2015年2月-2021年12月共7年的连续监测数据,根据工程开展情况以及水生态状况将大泊口水域划分为4个部分(A1~A4水域),首先分析4个区域内主要的水质指标(悬浮物(SS)、化学需氧量(CODCr)、总磷(TP)、总氮(TN)和叶绿素a(Chl.a))的变化趋势和相关性,其次探究不同类型生态工程的修复效果,最后与草海和外海水域进行对比,分析大泊口的治理效果。结果表明,治理后大泊口A1~A4水域的CODCr、TP和Chl.a稳定下降,CODCr分别降低18.65、27.96、25.26、40.92 mg/L,TP分别降低0.11、0.10、0.11、0.14 mg/L,Chl.a分别降低0.037、0.068、0.067、0.106 mg/L,SS具有较强的季节性波动,TN仅有东南部A4水域表现出持续下降的趋势,平均下降0.68 mg/L。通过相关性分析得出,CODCr、TP与Chl.a的相关性最强,CODCr和TP可能是影响大泊口藻类生长的关键环境因子;大泊口开展的引水换水工程和微滤净化(除藻)工程,降低了营养盐浓度、加速了水体交换,进而降低了藻类生物量以及发生藻源性污染的风险,再通过沉水植物修复工程进一步净化水质,为形成稳定的草型湖泊提供条件,并且认为沉水植物修复工程是上述工程中最为直接、经济和长效的手段措施;最后将大泊口典型水域的水质和草海、外海水质进行比较,可以认为在相同的地理及气候条件下,大泊口东南水域的生态修复取得了一定的成功。大泊口部分湖区可作为重度富营养化藻型湖区成功修复的案例,其生态修复经验对于持续推进大泊口、草海甚至整个滇池的生态环境修复具有重要的借鉴和参考价值。;Dabokou is located in the south of Caohai, Lake Dianchi, with an area of 0.52 km2 and an average water depth of about 2 m. As a typical severely eutrophic lake, Dabokou has undergone two phases of ecological restoration in 2015 and 2019. In recent years, the effects of the restoration have begun to be seen. In order to analyse and explore the reasons for the improvement of water quality and ecosystem in the successful restoration waters, this study selected the continuous monitoring data from February 2015 to December 2021 and divided Dabokou into four parts from A1 to A4 according to the engineering situation and water ecological situation. Firstly, the change trends and correlations of suspended solids (SS), chemical oxygen demand (CODCr), total phosphorus (TP), total nitrogen (TN) and chlorophyll-a (Chl.a) in the four areas were analysed. Secondly, the restoration effects of different ecological projects were investigated. Finally, the restoration effects of Dabokou were analysed by comparing with Caohai and Waihai. The results showed that after treatment, CODCr, TP and Chl.a decreased stably from A1 to A4 area. CODCr decreased by 18.65, 27.96, 25.26, 40.92 mg/L; TP decreased by 0.11, 0.10, 0.11, 0.14 mg/L; Chl.a decreased by 0.037, 0.068, 0.067, 0.106 mg/L, respectively. SS showed strong seasonal variations and TN showed a continuous decreasing trend only in area A4, the south-eastern part of Dabokou, with a decrease of 0.68 mg/L. Correlation analysis showed that CODCr and TP had the strongest correlation with Chl.a, which could be the key factors affecting algal growth. The water diversion and exchange project reduced nutrient concentrations and accelerated water circulation, and the microfilter cleaning and algae removal project reduced algal biomass and the risk of algal pollution. And through the purification functions of submerged macrophytes, the plant restoration project provided conditions for the formation of the macrophyte-dominated state lake. It is considered that the plant restoration project is the most direct, economical and long-term measure among the above projects. Comparing Dabokou with Caoha
{"title":"Effects of the long-term ecological restoration in the eutrophic plateau shallow lake—A case study of Dabokou, Lake Dianchi","authors":"Hua Yingxiao, Pan Jizheng, Du Jinsong, Li Yang, Yang Qi, Xu Shuang, Huang Yuhong","doi":"10.18307/2023.0514","DOIUrl":"https://doi.org/10.18307/2023.0514","url":null,"abstract":"大泊口位于滇池草海南部,水域面积0.52 km<sup>2</sup>,平均水深约2 m,作为滇池草海重富营养化水域生态修复示范区,大泊口分别于2015和2019年开展了两期生态修复工程,经过近年来的系统治理,大泊口水生态治理效果初步显现。为分析探究成功修复湖区水质改善、生态系统企稳向好的原因,本研究选择2015年2月-2021年12月共7年的连续监测数据,根据工程开展情况以及水生态状况将大泊口水域划分为4个部分(A1~A4水域),首先分析4个区域内主要的水质指标(悬浮物(SS)、化学需氧量(COD<sub>Cr</sub>)、总磷(TP)、总氮(TN)和叶绿素a(Chl.a))的变化趋势和相关性,其次探究不同类型生态工程的修复效果,最后与草海和外海水域进行对比,分析大泊口的治理效果。结果表明,治理后大泊口A1~A4水域的COD<sub>Cr</sub>、TP和Chl.a稳定下降,COD<sub>Cr</sub>分别降低18.65、27.96、25.26、40.92 mg/L,TP分别降低0.11、0.10、0.11、0.14 mg/L,Chl.a分别降低0.037、0.068、0.067、0.106 mg/L,SS具有较强的季节性波动,TN仅有东南部A4水域表现出持续下降的趋势,平均下降0.68 mg/L。通过相关性分析得出,COD<sub>Cr</sub>、TP与Chl.a的相关性最强,COD<sub>Cr</sub>和TP可能是影响大泊口藻类生长的关键环境因子;大泊口开展的引水换水工程和微滤净化(除藻)工程,降低了营养盐浓度、加速了水体交换,进而降低了藻类生物量以及发生藻源性污染的风险,再通过沉水植物修复工程进一步净化水质,为形成稳定的草型湖泊提供条件,并且认为沉水植物修复工程是上述工程中最为直接、经济和长效的手段措施;最后将大泊口典型水域的水质和草海、外海水质进行比较,可以认为在相同的地理及气候条件下,大泊口东南水域的生态修复取得了一定的成功。大泊口部分湖区可作为重度富营养化藻型湖区成功修复的案例,其生态修复经验对于持续推进大泊口、草海甚至整个滇池的生态环境修复具有重要的借鉴和参考价值。;Dabokou is located in the south of Caohai, Lake Dianchi, with an area of 0.52 km<sup>2</sup> and an average water depth of about 2 m. As a typical severely eutrophic lake, Dabokou has undergone two phases of ecological restoration in 2015 and 2019. In recent years, the effects of the restoration have begun to be seen. In order to analyse and explore the reasons for the improvement of water quality and ecosystem in the successful restoration waters, this study selected the continuous monitoring data from February 2015 to December 2021 and divided Dabokou into four parts from A1 to A4 according to the engineering situation and water ecological situation. Firstly, the change trends and correlations of suspended solids (SS), chemical oxygen demand (COD<sub>Cr</sub>), total phosphorus (TP), total nitrogen (TN) and chlorophyll-a (Chl.a) in the four areas were analysed. Secondly, the restoration effects of different ecological projects were investigated. Finally, the restoration effects of Dabokou were analysed by comparing with Caohai and Waihai. The results showed that after treatment, COD<sub>Cr</sub>, TP and Chl.a decreased stably from A1 to A4 area. COD<sub>Cr</sub> decreased by 18.65, 27.96, 25.26, 40.92 mg/L; TP decreased by 0.11, 0.10, 0.11, 0.14 mg/L; Chl.a decreased by 0.037, 0.068, 0.067, 0.106 mg/L, respectively. SS showed strong seasonal variations and TN showed a continuous decreasing trend only in area A4, the south-eastern part of Dabokou, with a decrease of 0.68 mg/L. Correlation analysis showed that COD<sub>Cr</sub> and TP had the strongest correlation with Chl.a, which could be the key factors affecting algal growth. The water diversion and exchange project reduced nutrient concentrations and accelerated water circulation, and the microfilter cleaning and algae removal project reduced algal biomass and the risk of algal pollution. And through the purification functions of submerged macrophytes, the plant restoration project provided conditions for the formation of the macrophyte-dominated state lake. It is considered that the plant restor","PeriodicalId":37454,"journal":{"name":"Hupo Kexue/Journal of Lake Sciences","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135358831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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