Characteristics of runoff pollution in a highly urbanized region: A case study in the Dongguan CityQiming Liu, Jingni Zeng, Hongyan Wu, Qiangqiang Rong, Wencong Yue and Meirong SuE3S Web Conf., 236 (2021) 03004DOI: https://doi.org/10.1051/e3sconf/202123603004