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Exploring nutrient management options to reduce water pollution in China
Group: Wageningen University
Promotors: Professor Carolien Kroeze; Professor Lin Ma
Intensive human activities in China have led to considerable nutrient losses to aquatic ecosystems, causing water pollution. This situation may worsen in the future. The aim of this PhD thesis is to increase our knowledge on nutrient pollution in water systems in China, focusing on its challenges, trends and solutions. The NUFER and MARINA models are used.
Results show that in recent past, nutrient losses from food production increased dramatically in China. To meet critical nutrient loads, river export of nutrients to Lake Taihu (a case study) needs to be reduced by 46-92%. Nutrient losses from food production to water systems in the future may increase as affected by global change. Current policies aimed at zero growth in fertilizer use are not effective in reducing water pollution in China. Effective options to reduce water pollution are improved nutrient management in agriculture and sewage systems, efficient food consumption, and climate mitigation.