Soil attributes functionality and water eutrophication in the surrounding area of Itaparica Reservoir, Brazil

Filho, J. C. de Araújo; Gunkel, Günter; Sobral, Maria Carmo; Kaupenjohann, Martin; Lopes, Heitor Silvério

doi:10.1590/s1415-43662013000900014

Cited by 13 publications

(2 citation statements)

References 30 publications

(32 reference statements)

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“…Sands in the area from Petrolândia to Ibimirim and Pernambuco State are very deep, excessively drained, strong to extremely acidic, and have low to very low natural fertility [38]. They are characteristic soils of the irrigation area of the village of Icó-Mandantes and only enable limited agricultural usage [39].…”

Section: Itaparica Reservoirmentioning

confidence: 99%

Management of Tropical River Basins and Reservoirs under Water Stress: Experiences from Northeast Brazil

Marques

Gunkel²,

Sobral

2019

Environments

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Due to global warming, a reduction in available water will occur in many watersheds and conflicts concerning water use will take place. This situation is already typical in semi-arid areas, where many reservoirs have been constructed for water storage. Increased energy demands and climate change have led to severe and increasing pressure on aquatic systems. Today, the environmental policies of many countries, such as Brazil, give priority to constructing new reservoirs for hydropower use, and an adopted reservoir and river basin management plan must minimize environmental impacts. Moreover, the production of energy plants will promote more requirements for new dam projects. The Itaparica reservoir is 30 years old, located in the São Francisco river in Northeast Brazil, and is the focus of an environmental study. The article focus of investigations is on the environmental and social impacts after the construction of Itaparica reservoir, governance difficulties, and adopted actions to minimize those impacts. Significant environmental impacts are recognizable, such as increased sedimentation in the inflow area, damage to the lakeshore zone by operational water level variation, water losses by evaporation and infiltration, and degradation of inundated vegetation. Furthermore, a trophic upsurge has been registered with severe eutrophication processes, such as the occurrence of cyanobacteria, oxygen deficit in the hypolimnion, and mass development of macrophytes (Egeria densa). With the creation of the dam there was compulsory displacement of the population of the municipalities around Itaparica reservoir with consequent difficulties of adaptation in the new spaces. Furthermore, there was de-structuring of social relation networks, loss of arable land and improvements, and small and insufficient indemnities for land. In this context, concepts for an advanced reservoir management under consideration of water scarcity are presented and discussed. This study aims to contribute to sustainable reservoir management

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Section: Itaparica Reservoirmentioning

confidence: 99%

Management of Tropical River Basins and Reservoirs under Water Stress: Experiences from Northeast Brazil

Marques

Gunkel²,

Sobral

2019

Environments

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“…Even though Arenosols can be found globally, they predominate in vast areas of arid and semi-arid regions (IUSS Working Group WRB 2014; Yost et al 2019). This also includes the Itaparica region, located in the state of Pernambuco in the north-east of Brazil (Araújo Filho et al 2013). These coarse-textured soils have low contents of organic carbon (C) and clay, resulting in limited capacity to retain water and nutrients (Huang and Hartemink 2020).…”

Section: Introductionmentioning

confidence: 99%

Amending a tropical Arenosol: increasing shares of biochar and clay improve the nutrient sorption capacity

Beusch

Melzer

Cierjacks

et al. 2022

Biochar

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Tropical Arenosols may be challenging for agricultural use, particularly in semi-arid regions. The aim of this study was to evaluate the impact of the addition of increasing shares of biochar and clay on the nutrient sorption capacity of a tropical Arenosol. In batch equilibrium experiments, the sorption of ammonium-N ($$\hbox {NH}_{4}^{+}{\text{-N}}$$ NH 4 + -N ), nitrate-N ($$\text {NO}_{3}^{-}{\text{-N}}$$ NO 3 - -N ), potassium ($$\text {K}^{+}$$ K + ), and phosphate-P ($$\text {PO}_{4}^{3-}{\text{-P}}$$ PO 4 3 - -P ) was quantified for mixtures of an Arenosol with increasing shares of biochar and clay (1%, 2.5%, 5%, 10%, 100%) and the unmixed Arenosol, biochar, and clay. The mid-temperature biochar was produced from Prosopis juliflora feedstock; the clayey material was taken from the sedimentary parent material of a temporarily dry lake. Only the Arenosol–biochar mixture with 10% biochar addition and the biochar increased the $$\text {NH}_{4}^{+}{\text{-N}}$$ NH 4 + -N maximum sorption capacity ($$q_{max}$$ q max ) of the Arenosol, by 34% and 130%, respectively. The $$q_{max}$$ q max of $$\text {PO}_{4}^{3-}{\text{-P}}$$ PO 4 3 - -P slightly increased with ascending biochar shares (1–10%) by 14%, 30%, 26%, and 42%, whereas the undiluted biochar released $$\text {PO}_{4}^{3-}{\text{-P}}$$ PO 4 3 - -P . Biochar addition slightly reduced $$\text {NO}_{3}^{-}{\text{-N}}$$ NO 3 - -N release from the Arenosol but strongly induced $$\text {K}^{+}$$ K + release. On the other hand, clay addition of 10% and clay itself augmented $$q_{max}$$ q max of $$\text {NH}_{4}^{+}{\text{-N}}$$ NH 4 + -N by 30% and 162%; ascending clay rates (1–100%) increased $$q_{max}$$ q max for $$\text {PO}_{4}^{3-}{\text{-P}}$$ PO 4 3 - -P by 78%, 130%, 180%, 268%, and 712%. Clay rates above 5% improved $$\text {K}^{+}$$ K + sorption; however, no $$q_{max}$$ q max values could be derived. Sorption of $$\text {NO}_{3}^{-}{\text{-N}}$$ NO 3 - -N remained unaffected by clay amendment. Overall, clay addition proved to enhance the nutrient sorption capacity of the Arenosol more effectively than biochar; nonetheless, both materials may be promising amendments to meliorate sandy soils for agricultural use in the semi-arid tropics.

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Soil Carbon Impacts on Functionality and Environmental Sustainability

Lal

2016

Carbon Management, Technologies, and Trends in Mediterranean Ecosystems

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Soil attributes functionality and water eutrophication in the surrounding area of Itaparica Reservoir, Brazil

Cited by 13 publications

References 30 publications

Management of Tropical River Basins and Reservoirs under Water Stress: Experiences from Northeast Brazil

Management of Tropical River Basins and Reservoirs under Water Stress: Experiences from Northeast Brazil

Amending a tropical Arenosol: increasing shares of biochar and clay improve the nutrient sorption capacity

Soil Carbon Impacts on Functionality and Environmental Sustainability

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