Nutrient budgets (N and P) for the Nui Coc reservoir catchment (North Vietnam)

Thi Phuong Quynh Le, Cuong Tu Ho, Thi Thuy Duong, Emma Rochelle-Newall, Dinh Kim Dang and Thanh Son Hoang

Agricultural Water Management, 2014, vol. 142, issue C, 152-161

Abstract: The Nui Coc reservoir (water surface: 25.2km2; catchment area: 567km2), typical of medium sized reservoirs in Vietnam and in South East Asia, was built in the 1970s to stimulate social and economic development in the surrounding area. The nitrogen and phosphorus budgets were established in this typical reservoir catchment to determine the degree of human-induced alteration of nitrogen and phosphorus cycles. The results showed that both nitrogen and phosphorus inputs are higher than their outputs in the agricultural soil system, indicating the excess of fertilizer utilization in the catchment. The budget of the hydrosystem revealed that the nitrogen and phosphorus fluxes from agricultural and forest soils accounted for 50% and 51% of the total inputs to the hydrosystem, respectively. About 66% of the annual total nitrogen and 79% of the annual total phosphorus inputs to the hydrosystem were deposited/eliminated in the reservoir.

Keywords: Nitrogen cycle; Phosphorus cycle; Nutrient budgets; Nui Coc reservoir; Vietnam; Human impacts (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:142:y:2014:i:c:p:152-161

DOI: 10.1016/j.agwat.2014.04.014

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