[en] At present, many cities in China have both severe water shortages and waste of large amounts of rainwater resources during heavy rains caused by urbanization. Turning rainwater resources into cities can reduce urban runoff and reduce peak floods. At the same time, it can increase urban water supply, beautify and clean the urban environment, improve urban microclimate, reduce ground subsidence, control rain and flood processes and reduce urban flood control. Drainage infrastructure investment greatly reduces urban flood disasters, which will bring considerable economic, social and environmental benefits. Therefore, as one of the hot topics in the preparation of special plans for drainage engineering in the new period, urban rainwater should be carried out using the SWMM model and computer software. The plan provides the possibility for further compiling special plans for rainwater utilization and guides the utilization of urban rainwater resources. (paper)

[en] The Fe-doped CdWO₄ nanoparticles were successfully synthesized via a hydrothermal method. The morphology, crystal structure and photocatalytic activity of the products were characterized and investigated. The results show that the Fe-doping can enhance the photocatalytic efficiency of CdWO₄ for degradation of methyl orange toxic dye. The optimal Fe/Cd atomic ratio of Fe-doped CdWO₄ is identified to be 0.10. The high activity of the Fe-doped CdWO₄ catalyst would be attributed to the decrease of grain size and the doped Fe ions can trap and transfer the electron–hole pairs. (paper)

[en] Highlights: • Hydrothermally stable Mesoporous materials were prepared via mother liquor recycling method. • Urea is employed as additive to alter the properties of surfactant solutions. • P123 utilization efficiency is drastically increased.