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Main Title: Three-dimensional modeling of wind- and temperature-induced flows in the Icó-Mandantes Bay, Itaparica Reservoir, NE Brazil
Author(s): Matta, Elena
Selge, Florian
Gunkel, Günter
Hinkelmann, Reinhard
Type: Article
Language Code: en
Is Part Of: 10.14279/depositonce-7137
Abstract: The Icó-Mandantes Bay is one of the major branches of the Itaparica Reservoir (Sub-Middle São Francisco River, Northeast Brazil) and is the focus of this study. Besides the harmful algae blooms (HAB) and a severe prolonged drought, the bay has a strategic importance—e.g., the eastern channel of the newly built water diversion will withdraw water from it (drinking water). This article presents the implementation of a three-dimensional (3D) numerical model—pioneering for the region—using TELEMAC-3D. The aim was to investigate the 3D flows induced by moderate or extreme winds as well as by heating of the water surface. The findings showed that a windstorm increased the flow velocities (at least one order of magnitude, i.e., up to 10−1–10−2 m/s) without altering significantly the circulation patterns; this occurred substantially for the heating scenario, which had, in contrast, a lower effect on velocities. In terms of the bay’s management, the main implications are: (1) the withdrawals for drinking water and irrigation agriculture should stop working during windstorms and at least three days afterwards; (2) a heating of the water surface would likely increase the risk of development of HAB in the shallow areas, so that further assessments with a water quality module are needed to support advanced remediation measures; (3) the 3D model proves to be a necessary tool to identify high risk contamination areas e.g., for installation of new aquaculture systems.
Issue Date: 2017
Date Available: 10-Nov-2017
DDC Class: 627 Wasserbau
Subject(s): Itaparica Reservoir
semi-arid region
Sponsor/Funder: DFG, TH 662/19-1, Open Access Publizieren 2017 - 2018 / Technische Universität Berlin
Journal Title: Water
Publisher: MDPI
Publisher Place: Basel
Volume: 9
Issue: 10
Article Number: 772
Publisher DOI: 10.3390/w9100772
ISSN: 2073-4441
Appears in Collections:FG Wasserwirtschaft und Hydrosystemmodellierung » Publications

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