TMDL for phosphorus and contributing factors in subtropical watersheds of southern China
Cen Meng, Yuyuan Li, Yi Wang, Wen Yang, Junxia Jiao, Meihui Wang, Manyi Zhang, Yong Li, Jinshui Wu
Environmental Monitoring and Assessment | SPRINGER | Published : 2015
Water eutrophication, particularly that caused by phosphorus runoff, is of major concern in China due to the serious threats it poses to watershed environments. We investigated one forested and nine agricultural watersheds with areas of 9-5212 ha in a hilly region of Hunan Province in a subtropical region of southern China from 2010 to 2012 to study total phosphorus (TP) loads and contributing factors. The annual TP loads varied from 35.7 to 222.1 kg P km(-2) year(-1) among the different watersheds, with the rainy season of spring and summer accounting for 56.3-82.0% of TP loss. The highest total maximum daily load (TMDL, 0.5 kg P km(-2) day(-1)) and existing exported daily TP loads (DTPL, 1..View full abstract
Awarded by National Science Fund of China
Awarded by National Science and Technology Pillar Program
This study was financially supported by the National Science Fund of China (41171396) and the National Science and Technology Pillar Program (2012BAD14B 17, 2014BAD14B02). The authors thank Mr. Weidong Zhang for his kind assistance in field observations.