The water quality of all rivers into the Qinhuangdao coastal water was below the grade V in 2013. In this study, an inte- grated MIKE 1 l water quality model is applied to deal with the water environment in the rivers...The water quality of all rivers into the Qinhuangdao coastal water was below the grade V in 2013. In this study, an inte- grated MIKE 1 l water quality model is applied to deal with the water environment in the rivers into the Qinhuangdao coastal water. The model is first calibrated with the field measured chemical oxygen demand （COD） concentrations. Then the transport of the COD in the rivers into the Qinhuangdao coastal water is computed based on the model in the water environmental monitoring process. Numerical results show that the COD concentration decreases dramatically in the estuaries, from which we can determine the positions of long-term monitoring stations to monitor the river pollutions into the coastal water. Furthermore, different scenarios about the inputs of the point sources and the non-point sources are simulated to discuss the model application in the water enviro- nmental control, and simplified formula are derived for assessing the water quality and the environmental management of rivers.展开更多
Abstract Blooms of some pico/nanophytoplankton have occurred frequently along the Qinhuangdao coast since 2009, and it is necessary to identify the critical environmental factors inducing them. In this study, variatio...Abstract Blooms of some pico/nanophytoplankton have occurred frequently along the Qinhuangdao coast since 2009, and it is necessary to identify the critical environmental factors inducing them. In this study, variations in the physical and nutrient characteristics of the seawater were analyzed following the development of local blooms in 2013. The local environmental characteristics were also compared with those of the Changjiang River estuary, China, and the Long Island estuaries in the USA, which are also prone to blooms of special algal species. In Qinhuangdao the local water temperature varied seasonally and rose above 15~C in 2013 early summer, coincident with the water discoloration. The salinity was more than 28 with a variation range of 〈3 throughout the year. Our results suggest that the physical conditions of the Qinhuangdao coastal area were suitable for the explosive proliferation of certain pico/nanophytoplankton, e.g. Aureococcus anophagefferens. The water supporting the bloom was not in a condition of serious eutrophication, but there were relatively high concentrations of reduced nitrogen （especially ammonium）, which acted as an important nitrogen source for the pico/nanophytoplankton bloom. There was also a large gap between total nitrogen （TN） and dissolved inorganic nitrogen （DIN）. Although the phosphate concentration was relatively low, there was no evidence of phosphorus limitation to the growth of pico/ nanophytoplankton during bloom events.展开更多
Landscape culture was the quintessence of landscape art. In the past 2 000 years, Qinhuangdao had accumulated rich cultural connotation. As cultural carrier, landscape architecture of Qinhuangdao displayed distinct cu...Landscape culture was the quintessence of landscape art. In the past 2 000 years, Qinhuangdao had accumulated rich cultural connotation. As cultural carrier, landscape architecture of Qinhuangdao displayed distinct cultural characteristics. Landscape culture of Qinhuangdao not only manifested in traditional culture and coastal culture, but also involved sports and Olympic culture, ecological culture and high-tech culture. So it was multi-culture with prominent features. In terms of protection and exploration of landscape culture of Qinhuangdao, it should reflect more sports spirit while the main feature of traditional culture and coastal culture was highlighted, so as to enhance the construction of ecological garden in Qinhuangdao and further apply modern technologies in landscape architecture.展开更多
基金Project supported by the Marine Public Welfare Pro-gram of China(Grant No.201305003-5)the Science and Technology Program of the Oceanic Administration of Hebei Province of China
文摘The water quality of all rivers into the Qinhuangdao coastal water was below the grade V in 2013. In this study, an inte- grated MIKE 1 l water quality model is applied to deal with the water environment in the rivers into the Qinhuangdao coastal water. The model is first calibrated with the field measured chemical oxygen demand （COD） concentrations. Then the transport of the COD in the rivers into the Qinhuangdao coastal water is computed based on the model in the water environmental monitoring process. Numerical results show that the COD concentration decreases dramatically in the estuaries, from which we can determine the positions of long-term monitoring stations to monitor the river pollutions into the coastal water. Furthermore, different scenarios about the inputs of the point sources and the non-point sources are simulated to discuss the model application in the water enviro- nmental control, and simplified formula are derived for assessing the water quality and the environmental management of rivers.
基金Supported by the National Natural Science Foundation of China(No.41576119)the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA11020302)the Public Science and Technology Research Funds Projects of Ocean(No.201305003-3)
文摘Abstract Blooms of some pico/nanophytoplankton have occurred frequently along the Qinhuangdao coast since 2009, and it is necessary to identify the critical environmental factors inducing them. In this study, variations in the physical and nutrient characteristics of the seawater were analyzed following the development of local blooms in 2013. The local environmental characteristics were also compared with those of the Changjiang River estuary, China, and the Long Island estuaries in the USA, which are also prone to blooms of special algal species. In Qinhuangdao the local water temperature varied seasonally and rose above 15~C in 2013 early summer, coincident with the water discoloration. The salinity was more than 28 with a variation range of 〈3 throughout the year. Our results suggest that the physical conditions of the Qinhuangdao coastal area were suitable for the explosive proliferation of certain pico/nanophytoplankton, e.g. Aureococcus anophagefferens. The water supporting the bloom was not in a condition of serious eutrophication, but there were relatively high concentrations of reduced nitrogen （especially ammonium）, which acted as an important nitrogen source for the pico/nanophytoplankton bloom. There was also a large gap between total nitrogen （TN） and dissolved inorganic nitrogen （DIN）. Although the phosphate concentration was relatively low, there was no evidence of phosphorus limitation to the growth of pico/ nanophytoplankton during bloom events.
基金Supported by Ph.D.Programs Foundation of Hebei Normal Universityof Science and Technology~~
文摘Landscape culture was the quintessence of landscape art. In the past 2 000 years, Qinhuangdao had accumulated rich cultural connotation. As cultural carrier, landscape architecture of Qinhuangdao displayed distinct cultural characteristics. Landscape culture of Qinhuangdao not only manifested in traditional culture and coastal culture, but also involved sports and Olympic culture, ecological culture and high-tech culture. So it was multi-culture with prominent features. In terms of protection and exploration of landscape culture of Qinhuangdao, it should reflect more sports spirit while the main feature of traditional culture and coastal culture was highlighted, so as to enhance the construction of ecological garden in Qinhuangdao and further apply modern technologies in landscape architecture.
