Nonpoint Source Pollution Survey and BMPs Benefit Assessment for Urban Highways

• Main Authors: Yunn-Jiin WANG, 王韻瑾
• Other Authors: Jen-Yang Lin
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/8tf6h9

博士 === 國立臺北科技大學 === 工程科技研究所 === 102 === In order to find out non-point source pollution concentration and composition in Taiwan urban road . The study refer to the relevant environmental background, traffic volume, road attributes, speed limit, vehicle type and other considerations, at north urban road of Taiwan. And planning into water sampling and dry deposition collected, through sample collection and testing analysis to understand the concentration of non-point source pollution, such as SS, TP and heavy metals,... etc. and do sediment particle size analysis, heavy metal content of dry deposition to get quantitative results. By the mean concentration of event, thus use simple method estimating nonpoint pollution unit areal loading and total pollution amount of urban road. We can describe precipitation particle size, distribution and heavy metals content of dry deposition sediment in urban roads. through particle size analysis of dry deposition sediment and heavy metal content by ICP analysis component . The results showed: SS concentration is relative to rain intensity and flowrate, while increasing the flowrate, contaminants are flushed out quickly, F site 64-lane Elevated express roads than the E sites, urban roads and bridges, SS concentration of F is three times than E’s. The NH3-N concentrations decreased with rainfall enhancement. site E ,Tai -Line 3, Hua-jiang bridge. The NH3-N 3.24mg / L is three times higher to the F site.TP E sites were also the highest concentration, about three times higher in the D site. In terms of heavy metal concentrations, the site is mostly in F is the highest, such as Cu, Zn, Hg, As, Ni, etc., showing serious contribution to heavy metal pollution, If emissions accumulate in the soil or into the water. It can affect both human health and environmental ecosystem, also shows the initial storm runoff water is really necessary reprocessing. The study sites are mostly viaduct on EMCs concentration analysis is, SS concentration relative to other literature viaduct concentration is higher, about 1.15 to 6.21 times, also shows that the concentration of the viaduct type SS concentration than that other types of highway is higher, the higher the heavy traffic, and suspended solids(SS)with a load concentration for more high ; consistent with the results of the relevant literature. The heavy traffic higher, the suspended solids(SS) concentrations higher. The results of the analysis of heavy metals showed containing Pb, Cu, Fe, Na, Ni, etc., Fe content as high as 47,200 ppm, Na content of 3,507 ppm, display viaduct expressway C site , whose Fe, Zn, Pb, Ni content of heavy metals were higher than A,B sites. Ni heavy metal content also checked out only in C site, showing high heavy metal content in viaduct expressway. The deposition and EMCs concentration in C and F site ,in this study ,showed C and F belong to the same site, for the purpose of dry deposition and water quality sampling in two ways, the results of its analysis, heavy metal concentration of deposition in C site, Pb, Zn, Fe, Ni are the highest. EMCs water concentration analysis in F site showed that Pb, Zn, Ni, are also higher than other sites, both of which test results are consistent. Also shows whether it is dry deposition or water quality sampling EMCs concentration analysis, both of which should have relevance and the greater the amount of traffic their heavy metal content is highest. Therefore, prior to the development of planning and design, that is considered to be a significant, addition to the adoption of eco-environmental engineering methods, and more Should consider runoff pollutants closure, retention, purification and other effective control measures to ensure that runoff water infiltration through the relevant facilities, rain gardens (Rain Garden), wetlands and other control measures to reduce pollution runoff water thing, and then discharged into rivers in the catchment area or to ensure mankind''s living environment quality of water resources.