River export of nutrients to the coastal waters of China: The MARINA model to assess sources, effects and solutions


Transport van nutriƫnten door rivieren naar de kustwateren van China

Promovendus dr. M (Maryna) Strokal MSc
Promotor prof.dr. C (Carolien) Kroeze
Copromotor prof. dr. S. Luan, prof. dr. L. Ma
Organisatie Wageningen University & Research, Water Systems and Global Change, Leerstoelgroep Milieusysteemanalyse

di 13 december 2016 11:00 tot 12:30

Locatie Aula, gebouwnummer 362
Generaal Foulkesweg 1
6703 BG Wageningen

Samenvatting (in Engels)

Rivers export considerable amounts of nutrients to Chinese seas, causing
eutrophication. I developed the MARINA model (Model to Assess River Inputs of Nutrients to seAs) to analyse causes and effects of coastal water pollution in China and to explore solutions to reduce this pollution in the future.

My findings can be summarized as follows: Nitrogen and phosphorus export by Chinese rivers increased by a factor of 2-8 between 1970 and 2000. As a result, the potential for coastal eutrophication was higher in 2000 than in 1970. Most of dissolved nutrients was exported from middle- and downstream human activities. An important polluter is animal production directly discharging manure to Chinese rivers and thus causing eutrophication. In the future, it is possible to avoid water pollution by recycling manure and treating sewage waste efficiently