title: Analysis of nutrient transport and ecological response in Honghu Lake, China by using a mathematical model.
abstract: A two-dimensional (2D) water quality model was established to determine the response of water quality variables and submerged aquatic vegetation biomass to load reduction from watershed inflows and enclosure aquaculture in Honghu Lake in China. Results showed that the total nitrogen (TN) and total phosphorus (TP) loads from upstream discharge were the major external loads in the lake, accounting for 70% and 63% of the total loads, respectively. Scenario simulation results indicated that 93.2% of the lake area in summer (August) and 89.5% in autumn (November) could reach the protective targets (TN<1.0mg/L) under 50% reduction of inflow TN loads. Meanwhile, 58.7% of the lake area in summer and 63.1% in autumn could reach the protective targets (TP<0.05mg/L) under 50% reduction of aquaculture areas. The mass budget results of TN and TP showed that TP immobilisation was larger than TN immobilisation. The immobilisations for TN and TP from July to September were higher than those of other months under the combined impacts of increasing runoff during the wet period, phytoplankton bloom and water residence time. The 2D water quality model provided a relevant example for assessing the effects of runoff and aquaculture activities and served as scientific support for lake management to improve water quality in large shallow macrophytic lakes.
authors.affiliation: Institute of Geodesy and Geophysics, Chinese Academy of Sciences, No. 340 Xudong Rd., Wuhan 430077, Hubei, China; University of Chinese Academy of Sciences, No. 19A Yuquan Rd., Beijing 100049, China; School of Resource and Environmental Science and Engineering, Hubei University of Science and Technology, No. 88 Xianning Rd., Xianning, 437100, Hubei, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Zhang
authors.affiliation: Institute of Geodesy and Geophysics, Chinese Academy of Sciences, No. 340 Xudong Rd., Wuhan 430077, Hubei, China; Hubei Key Laboratory of Environment and Disaster Monitoring and Evaluation, No. 340 Xudong Rd., Wuhan 430077, Hubei, China.
authors.forename: Xuan
authors.initials: X
authors.lastname: Ban
authors.affiliation: Institute of Geodesy and Geophysics, Chinese Academy of Sciences, No. 340 Xudong Rd., Wuhan 430077, Hubei, China; Hubei Key Laboratory of Environment and Disaster Monitoring and Evaluation, No. 340 Xudong Rd., Wuhan 430077, Hubei, China. Electronic address: xueleiwang@whigg.ac.cn.
authors.forename: Xuelei
authors.initials: X
authors.lastname: Wang
authors.affiliation: Institute of Geodesy and Geophysics, Chinese Academy of Sciences, No. 340 Xudong Rd., Wuhan 430077, Hubei, China; Hubei Key Laboratory of Environment and Disaster Monitoring and Evaluation, No. 340 Xudong Rd., Wuhan 430077, Hubei, China.
authors.forename: Xiaobin
authors.initials: X
authors.lastname: Cai
authors.affiliation: Institute of Geodesy and Geophysics, Chinese Academy of Sciences, No. 340 Xudong Rd., Wuhan 430077, Hubei, China; Hubei Key Laboratory of Environment and Disaster Monitoring and Evaluation, No. 340 Xudong Rd., Wuhan 430077, Hubei, China.
authors.forename: Enhua
authors.initials: E
authors.lastname: Li
authors.affiliation: Institute of Geodesy and Geophysics, Chinese Academy of Sciences, No. 340 Xudong Rd., Wuhan 430077, Hubei, China; Hubei Key Laboratory of Environment and Disaster Monitoring and Evaluation, No. 340 Xudong Rd., Wuhan 430077, Hubei, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Institute of Geodesy and Geophysics, Chinese Academy of Sciences, No. 340 Xudong Rd., Wuhan 430077, Hubei, China; University of Chinese Academy of Sciences, No. 19A Yuquan Rd., Beijing 100049, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Yang
authors.affiliation: Institute of Geodesy and Geophysics, Chinese Academy of Sciences, No. 340 Xudong Rd., Wuhan 430077, Hubei, China; University of Chinese Academy of Sciences, No. 19A Yuquan Rd., Beijing 100049, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Institute of Geodesy and Geophysics, Chinese Academy of Sciences, No. 340 Xudong Rd., Wuhan 430077, Hubei, China; University of Chinese Academy of Sciences, No. 19A Yuquan Rd., Beijing 100049, China.
authors.forename: Xiaorong
authors.initials: X
authors.lastname: Lu
keywords: Aquaculture; Immobilisation; Modelling; Nutrient transport; Water quality