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We thank Wang et al.(1) for their comments on our article. Wang et al.(1) convincingly show in their recent publication that aquaculture is another important source of nutrients in rivers locally, and that this source has been neglected by several studies, including ours. When we developed our model, their publication was not available yet. We agree that aquaculture can be an important source of nutrients in Chinese rivers at the local scale.
Abstract Recovering nutrients from human excreta and wastewater has been receiving increasing attention as a means to supplement or replace synthetic fertilizer production. Apart from technologies for nutrient recovery at centralized wastewater treatment plants, numerous decentralized, source‐separated sanitation systems, also known as new sanitation systems, have been developed to facilitate recovery.
Anthropogenic nutrient inputs of nitrogen (N) and phosphorus (P) to water systems deteriorate water quality globally.(1,2) Elevated levels of human-generated nutrients in watersheds are exported to rivers and then to coastal systems.(3) Global nutrient models such as the Global Nutrient Export from Watersheds 2 (Global NEWS-2)(4) on a basin scale and the Integrated Model to Assess the Global Environment–Global Nutrient Model (IMAGE-GNM)(5) on a 0.5° grid scale were developed to quantify...
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