NDLI: Nutrient export by rivers to the coastal waters of China: management strategies and future trends

Content Provider	Springer Nature Link
Author	Qu, Hong Juan Kroeze, Carolien
Copyright Year	2011
Abstract	We analyzed past and future trends in river export of dissolved nitrogen (N) and phosphorus (P) to the coastal waters of China, for a selection of rivers, as calculated by the Global NEWS models (Nutrient Export from WaterSheds). Over the period 1970–2000, river export of dissolved nutrients increased considerably, especially of dissolved inorganic N and P. Anthropogenic sources of N and P in rivers have become increasingly important, in particular N and P losses from agriculture. We tested the sensitivity of calculated nutrient export by rivers to changes in selected controlling factors. The calculated export of dissolved N and P is sensitive to changes in hydrology, synthetic fertilizer use and manure excretion in river basins. Changes in sewage inputs have large effects on dissolved inorganic P export. We analyzed future trends up to 2050 for several scenarios to illustrate the combined effects of selected management options. In the Base Scenario, the N and P export by the selected rivers increases considerably between 2000 and 2030. The increase continues from 2030 to 2050 except for DIP. Strategies to reduce N and P export by rivers include changes in agriculture, sewage and energy use. Changes in agriculture have the largest impact on future dissolved N and P river export to the coastal waters of China. The effectiveness of reduction strategies differs between nutrient forms and basins.
Starting Page	153
Ending Page	167
Page Count	15
File Format	PDF
ISSN	14363798
Journal	Regional Environmental Change
Volume Number	12
Issue Number	1
e-ISSN	1436378X
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-08-04
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nutrient export River Coastal waters Management strategy Sensitivity analysis Scenario Oceanography Regional/Spatial Science Geography (general) Geology Climate Change Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change

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