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  • Trans Tech Publications, Ltd.  (3)
  • Fu, Jin Mu  (3)
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  • Trans Tech Publications, Ltd.  (3)
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  • 1
    Online Resource
    Online Resource
    Trans Tech Publications, Ltd. ; 2013
    In:  Advanced Materials Research Vol. 712-715 ( 2013-6), p. 520-526
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 712-715 ( 2013-6), p. 520-526
    Abstract: For understanding the temporal variation of nitrogen and phosphorus concentrations in Huihe River, Suzhou, the observed data (including NH 4 + -N、 TN、TP, the temple and quantity of the water) from 2007 to 2010 were analyzed by statistical analysis including correlation, cluster and factor analysis. The results imply that the variations of concentrations of NH 4 + -N, TN and TP in Huihe River were significant, their concentrations are 0.05-4.22mg/L, 0.11-15.14mg/L and 0.01-1.41mg/L, respectively. Correlation and factor analysis suggest that NH 4 + -N、TN and TP are well correlated with water temperature, whereas there is no significant between them and water quantity. Comparative study and cluster analysis, as well as factor analysis imply that the temporal variations of nitrogen and phosphorus concentrations in Huihe River are significant, and coincide with the seasonal variation of climatic variation of the study area. The results show that either dredging project or climate factors (seasonal changes) had dramatically affected the pollution of NH 4 + -N, TN and TP. Moreover, the study also confirmed that NH 4 + -N, TN pollution is mainly anthropogenic, different with TP pollution, who is more likely to be controlled by natural factors.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2265002-7
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  • 2
    Online Resource
    Online Resource
    Trans Tech Publications, Ltd. ; 2013
    In:  Applied Mechanics and Materials Vol. 295-298 ( 2013-2), p. 928-932
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 295-298 ( 2013-2), p. 928-932
    Abstract: Based on continuous observation data of two cross-sections among 2007-2010 in Tuo River of Suzhou, investigated the distribution characteristics of TN、TP and NH 4 + -N pollution. The result shows that TN、TP and NH 4 + -N variation between 0.1-14.39 mg/L、0.029-0.89 mg / L and 0.011-5.72mg / L. Beside, the investigation appeared that annual average change is in the state of upward trend; seasonal changes is significant, but has no notable regularity. Related analysis shows that the water temperature correlated weakly with the water volume、TN、TP and NH4+-N. Conclusions indicate that human activities in the region of Tuo River influence TN、TP and NH 4 + -N pollution situation and point source pollution is a major influence factor.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2251882-4
    Location Call Number Limitation Availability
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  • 3
    Online Resource
    Online Resource
    Trans Tech Publications, Ltd. ; 2013
    In:  Applied Mechanics and Materials Vol. 295-298 ( 2013-2), p. 2635-2638
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 295-298 ( 2013-2), p. 2635-2638
    Abstract: Global climate change has far-reaching impact on natural ecosystems and the socio –economic system, which has called for attention of governments and scientific community and even the general public now. In the background of global climate change, the study of the effect of climate change on crop potential production has an important theoretical and practical significance. The relationship between wheat productivity and climate change and the response of the wheat productivity to the climate change were studied with Suzhou, China being a study area, aiming to provide a scientific basis for rational development and utilization of climate resources against the global climate change in Suzhou. The results showed that the annual average temperature of Suzhou tended to increase by 0.23 ° C per 10 years from 1977 to 2007. The annual precipitation has not been increased obviously over the recent 30 years. In the terms of annual change of climatic productivity of wheat, the average wheat productivity on the whole showed a increasing trend the last 50 years. However, the potential climatic productivity of wheat every decade first decrease and then increased. The correlation analysis indicated that there were assume the weak and assumes the strong correlations between the wheat climate productivity and the temperature and the precipitation with their relation coefficients (R) are R=0.04187 and R=0.70051, respectively. the influence of the precipitation to the Suzhou wheat climate productivity is higher than the temperature obviously . But there were the strong correlations between the wheat actual output and the temperature and the precipitation, therefore, the temperature and the precipitation are the important attributes that enhances wheat climate productivity realization rate.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2013
    detail.hit.zdb_id: 2251882-4
    Location Call Number Limitation Availability
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