Carlos Eduardo Mounic-Silva, Flávio Boscatto, Julia Cucco Dalri, Marco Antônio Polli, Flávia Tavares Mattos, Emanuela Rodrigues Meneghetti, Raica Esteves Xavier Meante, Celso Carlos Buglione-Neto, Alex Pires De Oliveira Nuñer
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引用次数: 0
Abstract
This study applies a GIS-based approach to evaluate the spatial suitability of net-cage aquaculture and analyse key water quality parameters in four hydroelectric reservoirs located in the Jamari River basin, Western Brazilian Amazon. The assessment includes one large hydropower reservoir (HPP Samuel) and three small hydropower reservoirs (SHDs): SC Monte Negro, Jamari and Canaã. The methodology followed five stages: (1) temporal analysis of Total Water Surface Area (TWSA); (2) identification of vegetation-free areas; (3) evaluation of depth suitability; (4) compilation of historical water level data and limnological parameters (chlorophyll-a, BOD, total phosphorus, dissolved oxygen); and (5) mapping and estimation of Potential Aquaculture Sites (PAS). Due to excessive seasonal variation (> 70% fluctuation in TWSA), the Samuel HPP reservoir was excluded from the final suitability mapping. In contrast, the SHD reservoirs exhibited environmental stability and fulfilled legal requirements for net-cage installation. Together, they offer an estimated production potential of up to 466 t per year using native species such as Colossoma macropomum. Most water quality parameters complied with Brazilian environmental standards (CONAMA Resolution no. 357/2005). This spatial and limnological assessment provides a technical foundation for implementing sustainable aquaculture systems in Amazonian hydroelectric reservoirs. Further studies should incorporate ecological carrying capacity modelling and environmental impact projections to support long-term sustainable aquaculture practices in these freshwater ecosystems.
本研究采用基于gis的方法,对巴西西部亚马逊地区贾马里河流域4个水电站网箱养殖的空间适宜性进行了评价,并对关键水质参数进行了分析。评估包括一个大型水电站(HPP Samuel)和三个小型水电站(SHDs): SC Monte Negro, Jamari和Canaã。方法分为五个阶段:(1)总水面面积(TWSA)的时间分析;(2)无植被区识别;(3)深度适宜性评价;(4)编制历史水位资料和湖泊学参数(叶绿素-a、BOD、总磷、溶解氧);(5)潜在水产养殖场址(PAS)的制图和估算。由于季节变化太大(TWSA波动>; 70%), Samuel HPP水库被排除在最终的适宜性制图之外。相比之下,SHD油藏表现出环境稳定性,并满足法律规定的网箱安装要求。据估计,它们利用巨像(Colossoma macropomum)等本地物种,每年可提供高达466吨的生产潜力。大多数水质参数符合巴西环境标准。357/2005)。这种空间和湖泊学评价为在亚马逊水电水库实施可持续水产养殖系统提供了技术基础。进一步的研究应纳入生态承载能力模型和环境影响预测,以支持这些淡水生态系统的长期可持续水产养殖做法。
期刊介绍:
Lakes & Reservoirs: Research and Management aims to promote environmentally sound management of natural and artificial lakes, consistent with sustainable development policies. This peer-reviewed Journal publishes international research on the management and conservation of lakes and reservoirs to facilitate the international exchange of results.