Daqing Wetland was contaminated by heavy metals for holding lots of industrial and domestic waste water. Due to their high stability and non-degradation, heavy metals are possible to gather in human body through the f...Daqing Wetland was contaminated by heavy metals for holding lots of industrial and domestic waste water. Due to their high stability and non-degradation, heavy metals are possible to gather in human body through the food chain and then threaten health. Water samples were collected from Longfeng Wetland and lake marshes in the vicinity of Daqing City. The contents of heavy metals （Cd, Pb, Cr, Cu, Zn, Ni） were determined, and the contamination degrees were evaluated simultaneously. The results indicate that heavy metals of Zn, Ni, Cd, Cr and Pd have contaminated the Longfeng Wetland severely. In addition the concentrations of Cr and Cd in some lakes around oil wells are excessively high, and have overrun the grade V based on the threshold values of surface water given by the National Environmental Protection Agency of China. Some measures have to be taken to tackle heavy metal contamination of Longfeng Wetland and lake marshes in Daqing City.展开更多
Based on relevant urban planning and design standards and a study on successful cases of comprehensive urban design in China, this paper explores a methodology of comprehensive urban design in large scale projects by ...Based on relevant urban planning and design standards and a study on successful cases of comprehensive urban design in China, this paper explores a methodology of comprehensive urban design in large scale projects by applying classical urban design theories and advanced digital technologies. This enables a combination of artful design and scientifi c analysis through the establishment of an urban design indicator system, the application of digital technologies and a multi-leveled control over design contents. The chosen case of the Daqing Comprehensive Urban Design shows that the proposed measures can effectively promote the supervision of comprehensive urban design on both urban morphology and landscape, rapidly convert the urban design outcomes into management rules, and ultimately facilitate the application of the urban design outcomes.展开更多
基金Project supported by the Shanghai Leading Academic Discipline Project(Grant No.S30109)the Innovation Foundation of Shanghai University
文摘Daqing Wetland was contaminated by heavy metals for holding lots of industrial and domestic waste water. Due to their high stability and non-degradation, heavy metals are possible to gather in human body through the food chain and then threaten health. Water samples were collected from Longfeng Wetland and lake marshes in the vicinity of Daqing City. The contents of heavy metals （Cd, Pb, Cr, Cu, Zn, Ni） were determined, and the contamination degrees were evaluated simultaneously. The results indicate that heavy metals of Zn, Ni, Cd, Cr and Pd have contaminated the Longfeng Wetland severely. In addition the concentrations of Cr and Cd in some lakes around oil wells are excessively high, and have overrun the grade V based on the threshold values of surface water given by the National Environmental Protection Agency of China. Some measures have to be taken to tackle heavy metal contamination of Longfeng Wetland and lake marshes in Daqing City.
文摘Based on relevant urban planning and design standards and a study on successful cases of comprehensive urban design in China, this paper explores a methodology of comprehensive urban design in large scale projects by applying classical urban design theories and advanced digital technologies. This enables a combination of artful design and scientifi c analysis through the establishment of an urban design indicator system, the application of digital technologies and a multi-leveled control over design contents. The chosen case of the Daqing Comprehensive Urban Design shows that the proposed measures can effectively promote the supervision of comprehensive urban design on both urban morphology and landscape, rapidly convert the urban design outcomes into management rules, and ultimately facilitate the application of the urban design outcomes.
