[Objective]We aimed to study the influencing factors and comprehensive management of environmental problems in Dongping Lake.[Method]Based on field investigation and historical data,environmental problems of Dongping ...[Objective]We aimed to study the influencing factors and comprehensive management of environmental problems in Dongping Lake.[Method]Based on field investigation and historical data,environmental problems of Dongping Lake and their influencing factors were analyzed,and seven measures about comprehensive management of environmental issues and ecological protection of Dongping Lake were put forward.[Result]During recent years,the content of total nitrogen and total phosphorus in Dongping Lake showed a decreasing trend,but the water was still in the eutrophic state.The environmental problems of Dongping Lake,like flood,drought and pollution,are closely linked to natural and man-made factors,such as regional seasonal precipitation,industrial and agricultural pollution,etc.In order to control the environmental problems of Dongping Lake,we should strengthen the construction and management of wetland nature reserves,develop ecological agriculture,establish an integral system for environmental monitoring and information management,reinforce propaganda and education to improve residents’ environmental consciousness,etc.[Conclusion]The research could provide scientific references for the comprehensive management of environmental problems in Dongping Lake and its basin.展开更多
Based on 3 m×3 m grid in sloping cornfield with soil auger in Yingwugou Small Watershed of the Dan River Basin,a total of 39sampling points were collected,and soil water content and nutrient content were measured...Based on 3 m×3 m grid in sloping cornfield with soil auger in Yingwugou Small Watershed of the Dan River Basin,a total of 39sampling points were collected,and soil water content and nutrient content were measured in different soil depths.Meanwhile,the soil properties of different depth have been analyzed by traditional statistical and geo-statistics approaches.The results showed:the mean value of total nitrogen and soil organic carbon reduced as soil depth increased in general.But soil water content increased as the soil depth increased.The change of total phosphorus with soil depth was not obvious.The total nitrogen,soil water content,soil organic carbon and total phosphorus presented a moderate intensity variation and strong spatial dependence.In the four sampling depths,semi-variance model can simulate spatial structure of total nitrogen,soil water content and total phosphorus in 0 to 10 cm and 10 to 20 cm well.But the spatial structure of soil organic carbon was not good,which could not be simulated with semi-variance model.The analysis with Kriging interpolation showed that,the total nitrogen,soil water content and total phosphorus presented layered distribution in 0 to 10 cm and 10 to 20 cm;when the spatial distribution changed to 10 to 20cm from 0 to 10 cm,the average total nitrogen content reduced to from 0.598 g/kg 0.310 g/kg,while the average soil water content and total phosphorus increased from 12.988%to 15.439%and from 0.229 g/kg to 0.366 g/kg,respectively.展开更多
To study the eutrophic status of Dongqian Lake,the contents of total nitrogen（ TN）,total phosphorus（ TP） and chlorophyll（ Chla） and the biomass of submerged plants in Dongqian Lake were monitored from April to S...To study the eutrophic status of Dongqian Lake,the contents of total nitrogen（ TN）,total phosphorus（ TP） and chlorophyll（ Chla） and the biomass of submerged plants in Dongqian Lake were monitored from April to September 2014,and their correlations were discussed. The results showed that there were regular changes in the TN,TP,and Chla content,and the biomass of submerged plants in Dongqian Lake,that is,the water quality of the lake was inferior in the early growth period of submerged plants and phytoplankton. The correlation analysis showed that the biomass of submerged plants correlated with TP and TN content negatively. In a word,the increase in the biomass of submerged plants was a key factor leading to the shift of water quality in Dongqian Lake in the later period,indicating that submerged plants played an important role in the steady-state shift of aquatic environment in Dongqian Lake.展开更多
基金Supported by National Natural Science Foundation of China(40901276,40871239,41072258)Doctoral Foundation of Shandong Province,China (2011BSB01256)
文摘[Objective]We aimed to study the influencing factors and comprehensive management of environmental problems in Dongping Lake.[Method]Based on field investigation and historical data,environmental problems of Dongping Lake and their influencing factors were analyzed,and seven measures about comprehensive management of environmental issues and ecological protection of Dongping Lake were put forward.[Result]During recent years,the content of total nitrogen and total phosphorus in Dongping Lake showed a decreasing trend,but the water was still in the eutrophic state.The environmental problems of Dongping Lake,like flood,drought and pollution,are closely linked to natural and man-made factors,such as regional seasonal precipitation,industrial and agricultural pollution,etc.In order to control the environmental problems of Dongping Lake,we should strengthen the construction and management of wetland nature reserves,develop ecological agriculture,establish an integral system for environmental monitoring and information management,reinforce propaganda and education to improve residents’ environmental consciousness,etc.[Conclusion]The research could provide scientific references for the comprehensive management of environmental problems in Dongping Lake and its basin.
基金Supported by the Natural Science Foundations of China(41071182)the Natural Science Foundations of Shaanxi Province(2011JE008)the Colleges Key Laboratory Science Research Program of Shaanxi Province(12JS065)
文摘Based on 3 m×3 m grid in sloping cornfield with soil auger in Yingwugou Small Watershed of the Dan River Basin,a total of 39sampling points were collected,and soil water content and nutrient content were measured in different soil depths.Meanwhile,the soil properties of different depth have been analyzed by traditional statistical and geo-statistics approaches.The results showed:the mean value of total nitrogen and soil organic carbon reduced as soil depth increased in general.But soil water content increased as the soil depth increased.The change of total phosphorus with soil depth was not obvious.The total nitrogen,soil water content,soil organic carbon and total phosphorus presented a moderate intensity variation and strong spatial dependence.In the four sampling depths,semi-variance model can simulate spatial structure of total nitrogen,soil water content and total phosphorus in 0 to 10 cm and 10 to 20 cm well.But the spatial structure of soil organic carbon was not good,which could not be simulated with semi-variance model.The analysis with Kriging interpolation showed that,the total nitrogen,soil water content and total phosphorus presented layered distribution in 0 to 10 cm and 10 to 20 cm;when the spatial distribution changed to 10 to 20cm from 0 to 10 cm,the average total nitrogen content reduced to from 0.598 g/kg 0.310 g/kg,while the average soil water content and total phosphorus increased from 12.988%to 15.439%and from 0.229 g/kg to 0.366 g/kg,respectively.
基金Supported by the Social Sciences Project of Cixi City(2015SKB005)Planning Project of Ningbo Science and Technology Bureau for Enriching People(2015C50002)+1 种基金Science and Technology Project of the Minister of Housing and Urban-Rural Development(2015-K7-008)Provincial Plan for Technological Application Research for Public Welfare of Science and Technology Department of Zhejiang Province(2016C33251)
文摘To study the eutrophic status of Dongqian Lake,the contents of total nitrogen（ TN）,total phosphorus（ TP） and chlorophyll（ Chla） and the biomass of submerged plants in Dongqian Lake were monitored from April to September 2014,and their correlations were discussed. The results showed that there were regular changes in the TN,TP,and Chla content,and the biomass of submerged plants in Dongqian Lake,that is,the water quality of the lake was inferior in the early growth period of submerged plants and phytoplankton. The correlation analysis showed that the biomass of submerged plants correlated with TP and TN content negatively. In a word,the increase in the biomass of submerged plants was a key factor leading to the shift of water quality in Dongqian Lake in the later period,indicating that submerged plants played an important role in the steady-state shift of aquatic environment in Dongqian Lake.
