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Liu Z.,Jiangxi Academy of Environmental science | Ni Z.,Chinese Research Academy of Environmental Sciences | Ni Z.,Dongting Lake Ecological Observation and Research Station DEORS
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2015

Poyang Lake is the largest river-connected lake along the Yangtze River basin, with a unique river-lake relationship. Formation and evolution of the modern Poyang Lake is the result of long-term interaction and development of multi-factors, which has undergone several different phases. These factors played the distinct roles in the different phases of the evolution, in the process of which which the natrual effect comes slowly, while anthropogenic effect appears faster and more directly. With the social-economic development around the lake area, human dependence highlights the importance, vulnerability and susceptibility of Poyang Lake ecosystem. This dependence surely will detrimentally take the effect on the course of lake evolution, especially to the shallow lakes in alluvial plains. It's worth noting that the significant impacts of the alteration of river-lake and human-lake relationships will bring more variables and uncertainties on the evolution of Poyang Lake in the future. To guarantee the Poyang Lake's eco-safety, it's particularly important and urgent to understand and predict the changing tendences of river-lake relationship scientifically and to propose countmeasures. ©, 2015, Science Press. All right reserved. Source


Wang S.,Chinese Research Academy of Environmental Sciences | Wang S.,Dongting Lake Ecological Observation and Research Station DEORS | Ni Z.,Chinese Research Academy of Environmental Sciences | Ni Z.,Dongting Lake Ecological Observation and Research Station DEORS | And 7 more authors.
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2015

The changes of river-lake relationship have become one of the important influencing factors on water environmental quality of Poyang Lake. the influence mechanisms of river-lake relationship change on water environment were revealed according to the development and evolution of Poyang Lake and the effects of river-lake relationship change on pollution load into the lake, water quality, sediment, and plankton bloom, etc. From the perspective of biogeochemical cycles of nitrogen and phosphorus, it is revealed that the influence mechanisms of river-lake relation change on generation, transportation, transformation and degradation, as well as the distribution and partition of nitrogen and phosphorus in water and sediment. the coupling model of water quality-hydrodynamic was used to assess the influence of river-lake relation change on water quality and water hydrodynamic. the SWAT model and GIS technique were utilized to calculate the influence of river-lake relation change on input of nutrient load and that on distribution of typical wetland vegetation. the influence of river-lake relation change on algal blooms was discovered through utilizing the methods of situ observation and laboratory simulation experiment. ©, 2015, Science Press. All right reserved. Source

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