Next Article in Journal
Discharge Coefficient of a Round-Crested Weir
Previous Article in Journal
Effects of Cemented Porous Media on Temporal Mixing Behavior of Conservative Solute Transport
Open AccessArticle

Nitrogen and Phosphorus Budget for a Deep Tropical Reservoir of the Brazilian Savannah

Institute of Chemistry, Campus Darcy Ribeiro, University of Brasília, Brasília DF 71910-000, Brazil
*
Author to whom correspondence should be addressed.
Water 2019, 11(6), 1205; https://doi.org/10.3390/w11061205
Received: 23 April 2019 / Revised: 20 May 2019 / Accepted: 27 May 2019 / Published: 10 June 2019
(This article belongs to the Section Water Quality and Ecosystems)
This research investigated the source and fate of different chemical species of N and P on a deep tropical urban reservoir, the artificial Lake Paranoá, located in the city of Brasilia (Brazil). To determine an N and P budget, nutrient input from the external load (four main tributaries and two wastewater treatment plants), internal load (from sediment) and nutrient output (from a downstream dam) were estimated empirically. Nutrient storage was evaluated in two compartments: water column and sediment. Nutrient input from the tributaries varied by season presenting higher loads in the wet season, especially N. Nutrient budgets in our study indicated that Lake Paranoá retained dissolved inorganic nitrogen (DIN), PO43−-P, total organic phosphorus (TOP) and exported total organic nitrogen (TON), both on a seasonal and annual scale. Surface sediment is the major storage compartment for both N and P. These results show the pressing need for action to reduce the P outcome charges, mainly, from the wastewater treatment plants. The data here presented contributes to the recognition of this situation and to a better comprehension of these nutrient dynamics, as well as an understanding of the behavior of tropical deep-water reservoirs. This can help to promote more effective management, providing a reference for other similar systems. View Full-Text
Keywords: external load; internal load; lake; tributaries; nitrogen; phosphorus external load; internal load; lake; tributaries; nitrogen; phosphorus
Show Figures

Figure 1

MDPI and ACS Style

Barbosa, J.S.B.; Bellotto, V.R.; da Silva, D.B.; Lima, T.B. Nitrogen and Phosphorus Budget for a Deep Tropical Reservoir of the Brazilian Savannah. Water 2019, 11, 1205.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop