MAPPING OF FURNITURE INDUSTRIES AND THEIR POSSIBLE IMPACTS ON THE RIO DOS SINOS WATERSHED

Abstract

Objective: The objective of this study was to map the furniture industries located along the Rio dos Sinos Basin. Theoretical Framework: The furniture industry is essential to the global economy, standing out in Brazil and the state as a highly relevant economic activity. The Rio dos Sinos Basin, encompassing 32 municipalities, plays a crucial role in water supply and ecosystem maintenance but faces serious pollution issues due to industrial, urban, and agricultural activities. Method: The research mapped 83 industries in the region, highlighting the absence of consolidated databases and using tools such as ArcGIS and Google Earth. Results and Discussion: The results indicate a significant concentration of industries in the southwestern portion of the basin, where proximity to water resources and infrastructure favors the establishment of these companies. Industrial waste, such as chemical effluents, solvents, and wood scraps, are potential environmental contaminants, requiring effective treatment systems and sustainable practices, such as the use of certified materials and eco-efficient technologies. The study concludes that integrated environmental management actions and public policies are essential to mitigate impacts and promote the basin's sustainability. Research Implications: The practical and theoretical implications of this research are discussed, providing insights into how the results can be applied or influence practices in the field of environmental quality. These implications may include environmental and water pollution, watershed management, and industrial waste treatment. Originality/Value: This study represents a significant contribution to the literature, as there are no previous records of industrial mapping in the analyzed region. Its relevance and value are demonstrated by its potential to serve as a reference for future investigations, in addition to providing essential support for monitoring water pollution and promoting environmental sustainability. Moreover, its economic and social importance is highlighted, considering that the furniture industry plays a fundamental role in the local economy, directly influencing regional development and environmental management.

Alternate abstract:

Objetivo: O objetivo deste estudo foi realizar um mapeamento das indústrias moveleiras situadas ao longo da Bacia do Rio dos Sinos. Referencial Teórico: A indústria moveleira é fundamental para a economia global, destacando-se no Brasil e no estado como uma atividade econômica de grande relevância. A Bacia do Rio dos Sinos, abrangendo 32 municípios, desempenha papel crucial no abastecimento de água e na manutenção de ecossistemas, mas enfrenta sérios problemas de poluição devido a atividades industriais, urbanas e agrícolas. Método: A pesquisa mapeou 83 indústrias na região, destacando a ausência de bases de dados consolidadas e utilizando ferramentas como ArcGIS e Google Earth. Resultados e Discussão: Os resultados apontam uma concentração significativa de indústrias na porção sudoeste da bacia, onde a proximidade a recursos hídricos e infraestrutura favorece a instalação dessas empresas. Ressaltase que os resíduos industriais, como efluentes químicos, solventes e aparas de madeira, são potenciais contaminantes ambientais, exigindo sistemas eficazes de tratamento e práticas sustentáveis, como o uso de materiais certificados e tecnologias ecoeficientes. Conclui-se que ações integradas de gestão ambiental e políticas públicas são fundamentais para mitigar os impactos e promover a sustentabilidade da bacia. Implicações da Pesquisa: As implicações práticas e teóricas desta pesquisa são discutidas, fornecendo insights sobre como os resultados podem ser aplicados ou influenciar práticas no campo de qualidade ambiental. Essas implicações podem abranger poluição ambiental e hídrica, bacias hidrográficas, tratamento de resíduos industriais. Originalidade/Valor: Este estudo representa uma contribuição significativa para a literatura, uma vez que não há registros prévios de mapeamento industrial na região analisada. Sua relevância e valor são evidenciados pelo potencial de servir como referência para investigações futuras, além de fornecer subsídios essenciais para o monitoramento da poluição hídrica e a promoção da sustentabilidade ambiental. Ademais, destaca-se sua importância econômica e social, considerando que a indústria moveleira desempenha um papel fundamental na economia local, influenciando diretamente o desenvolvimento regional e a gestão ambiental.

Alternate abstract:

Objetivo: El objetivo de este estudio fue realizar un mapeo de las industrias de muebles situadas a lo largo de la Cuenca del Río dos Sinos. Marco Teórico: La industria del mueble es fundamental para la economía global, destacándose en Brasil y en el estado como una actividad económica de gran relevancia. La Cuenca del Río dos Sinos, que abarca 32 municipios, desempeña un papel crucial en el abastecimiento de agua y en el mantenimiento de los ecosistemas, pero enfrenta serios problemas de contaminación debido a actividades industriales, urbanas y agrícolas. Método: La investigación mapeó 83 industrias en la región, destacando la ausencia de bases de datos consolidadas y utilizando herramientas como ArcGIS y Google Earth. Resultados y Discusión: Los resultados señalan una concentración significativa de industrias en la porción suroeste de la cuenca, donde la proximidad a los recursos hídricos y la infraestructura favorecen el establecimiento de estas empresas. Se destaca que los residuos industriales, como efluentes químicos, disolventes y recortes de madera, son potenciales contaminantes ambientales, lo que exige sistemas eficaces de tratamiento y prácticas sostenibles, como el uso de materiales certificados y tecnologías ecoeficientes. Se concluye que las acciones integradas de gestión ambiental y las políticas públicas son fundamentales para mitigar los impactos y promover la sostenibilidad de la cuenca. Implicaciones de la Investigación: Se discuten las implicaciones prácticas y teóricas de esta investigación, proporcionando información sobre cómo los resultados pueden aplicarse o influir en las prácticas en el campo de la calidad ambiental. Estas implicaciones pueden incluir la contaminación ambiental e hídrica, la gestión de cuencas hidrográficas y el tratamiento de residuos industriales. Originalidad/Valor: Este estudio representa una contribución significativa a la literatura, ya que no existen registros previos de mapeo industrial en la región analizada. Su relevancia y valor se evidencian por su potencial para servir como referencia en investigaciones futuras, además de proporcionar información esencial para el monitoreo de la contaminación hídrica y la promoción de la sostenibilidad ambiental. Además, se destaca su importancia económica y social, considerando que la industria del mueble desempeña un papel fundamental en la economía local, influyendo directamente en el desarrollo regional y en la gestión ambiental.

Headnote

ABSTRACT

Objective: The objective of this study was to map the furniture industries located along the Rio dos Sinos Basin.

Theoretical Framework: The furniture industry is essential to the global economy, standing out in Brazil and the state as a highly relevant economic activity. The Rio dos Sinos Basin, encompassing 32 municipalities, plays a crucial role in water supply and ecosystem maintenance but faces serious pollution issues due to industrial, urban, and agricultural activities.

Method: The research mapped 83 industries in the region, highlighting the absence of consolidated databases and using tools such as ArcGIS and Google Earth.

Results and Discussion: The results indicate a significant concentration of industries in the southwestern portion of the basin, where proximity to water resources and infrastructure favors the establishment of these companies. Industrial waste, such as chemical effluents, solvents, and wood scraps, are potential environmental contaminants, requiring effective treatment systems and sustainable practices, such as the use of certified materials and eco-efficient technologies. The study concludes that integrated environmental management actions and public policies are essential to mitigate impacts and promote the basin's sustainability.

Research Implications: The practical and theoretical implications of this research are discussed, providing insights into how the results can be applied or influence practices in the field of environmental quality. These implications may include environmental and water pollution, watershed management, and industrial waste treatment.

Originality/Value: This study represents a significant contribution to the literature, as there are no previous records of industrial mapping in the analyzed region. Its relevance and value are demonstrated by its potential to serve as a reference for future investigations, in addition to providing essential support for monitoring water pollution and promoting environmental sustainability. Moreover, its economic and social importance is highlighted, considering that the furniture industry plays a fundamental role in the local economy, directly influencing regional development and environmental management.

Keywords: Furniture Industries, Mapping, Liquid Waste, Watershed.

RESUMO

Objetivo: O objetivo deste estudo foi realizar um mapeamento das indústrias moveleiras situadas ao longo da Bacia do Rio dos Sinos.

Referencial Teórico: A indústria moveleira é fundamental para a economia global, destacando-se no Brasil e no estado como uma atividade econômica de grande relevância. A Bacia do Rio dos Sinos, abrangendo 32 municípios, desempenha papel crucial no abastecimento de água e na manutenção de ecossistemas, mas enfrenta sérios problemas de poluição devido a atividades industriais, urbanas e agrícolas.

Método: A pesquisa mapeou 83 indústrias na região, destacando a ausência de bases de dados consolidadas e utilizando ferramentas como ArcGIS e Google Earth.

Resultados e Discussão: Os resultados apontam uma concentração significativa de indústrias na porção sudoeste da bacia, onde a proximidade a recursos hídricos e infraestrutura favorece a instalação dessas empresas. Ressaltase que os resíduos industriais, como efluentes químicos, solventes e aparas de madeira, são potenciais contaminantes ambientais, exigindo sistemas eficazes de tratamento e práticas sustentáveis, como o uso de materiais certificados e tecnologias ecoeficientes. Conclui-se que ações integradas de gestão ambiental e políticas públicas são fundamentais para mitigar os impactos e promover a sustentabilidade da bacia.

Implicações da Pesquisa: As implicações práticas e teóricas desta pesquisa são discutidas, fornecendo insights sobre como os resultados podem ser aplicados ou influenciar práticas no campo de qualidade ambiental. Essas implicações podem abranger poluição ambiental e hídrica, bacias hidrográficas, tratamento de resíduos industriais.

Originalidade/Valor: Este estudo representa uma contribuição significativa para a literatura, uma vez que não há registros prévios de mapeamento industrial na região analisada. Sua relevância e valor são evidenciados pelo potencial de servir como referência para investigações futuras, além de fornecer subsídios essenciais para o monitoramento da poluição hídrica e a promoção da sustentabilidade ambiental. Ademais, destaca-se sua importância econômica e social, considerando que a indústria moveleira desempenha um papel fundamental na economia local, influenciando diretamente o desenvolvimento regional e a gestão ambiental.

Palavras-chave: Indústrias Moveleiras, Mapeamento, Resíduos Líquidos, Bacia Hidrográfica.

RESUMEN

Objetivo: El objetivo de este estudio fue realizar un mapeo de las industrias de muebles situadas a lo largo de la Cuenca del Río dos Sinos.

Marco Teórico: La industria del mueble es fundamental para la economía global, destacándose en Brasil y en el estado como una actividad económica de gran relevancia. La Cuenca del Río dos Sinos, que abarca 32 municipios, desempeña un papel crucial en el abastecimiento de agua y en el mantenimiento de los ecosistemas, pero enfrenta serios problemas de contaminación debido a actividades industriales, urbanas y agrícolas.

Método: La investigación mapeó 83 industrias en la región, destacando la ausencia de bases de datos consolidadas y utilizando herramientas como ArcGIS y Google Earth.

Resultados y Discusión: Los resultados señalan una concentración significativa de industrias en la porción suroeste de la cuenca, donde la proximidad a los recursos hídricos y la infraestructura favorecen el establecimiento de estas empresas. Se destaca que los residuos industriales, como efluentes químicos, disolventes y recortes de madera, son potenciales contaminantes ambientales, lo que exige sistemas eficaces de tratamiento y prácticas sostenibles, como el uso de materiales certificados y tecnologías ecoeficientes. Se concluye que las acciones integradas de gestión ambiental y las políticas públicas son fundamentales para mitigar los impactos y promover la sostenibilidad de la cuenca.

Implicaciones de la Investigación: Se discuten las implicaciones prácticas y teóricas de esta investigación, proporcionando información sobre cómo los resultados pueden aplicarse o influir en las prácticas en el campo de la calidad ambiental. Estas implicaciones pueden incluir la contaminación ambiental e hídrica, la gestión de cuencas hidrográficas y el tratamiento de residuos industriales.

Originalidad/Valor: Este estudio representa una contribución significativa a la literatura, ya que no existen registros previos de mapeo industrial en la región analizada. Su relevancia y valor se evidencian por su potencial para servir como referencia en investigaciones futuras, además de proporcionar información esencial para el monitoreo de la contaminación hídrica y la promoción de la sostenibilidad ambiental. Además, se destaca su importancia económica y social, considerando que la industria del mueble desempeña un papel fundamental en la economía local, influyendo directamente en el desarrollo regional y en la gestión ambiental.

Palabras clave: Industrias del Mueble, Mapeo, Residuos Líquidos, Cuenca Hidrográfica.

1 INTRODUCTION

The furniture industry plays a significant role in the global economy, especially in Brazil, where it generates thousands of jobs and drives industrial development. However, this activity presents significant environmental challenges, such as the generation of solid and liquid waste, Which may contain chemicals that are harmful to the environment. Improper disposal of this waste compromises the quality of water resources, especially in highly industrialized regions, such as the Sinos River Basin. Given this scenario, sustainable management of industrial waste becomes essential, requiring the adoption of effluent treatment technologies, cleaner production practices and environmental certifications. Public policies, such as the National Solid Waste Policy (PNRS), establish guidelines to mitigate environmental impacts and ensure legal compliance in the sector.

This study aims to map the furniture industries located in the Sinos River Basin, identifying areas of greatest industrial concentration and analyzing their possible environmental implications. The research uses geoprocessing tools, such as ArcGIS, to visualize and understand the spatial distribution of these industries, contributing to more effective environmental management strategies.

2 THEORETICAL FRAMEWORK

The furniture industry plays a crucial role in the global economy, especially in countries like Brazil, where furniture production is a significant economic activity. In 2021, the sector generated more than 255,000 direct jobs in around 18,000 companies. Rio Grande do Sul, in turn, is the second largest furniture producer in the country, with approximately 2,400 industries (ABIMÓVEL, 2022). This sector is characterized by the transformation of raw materials, mainly wood, into finished products, such as residential and commercial furniture.

However, furniture production faces several environmental challenges. Among the main problems are deforestation, environmental degradation, air pollution and the generation of liquid waste (Souza, 2009; Doruk et al., 2016). During the process of transforming raw materials into furniture, a variety of solid and liquid waste is generated. Solid waste includes wood shavings, sawdust, sandpaper dust and leftover materials such as MDF and plywood ( Ulker , 2016). This waste may contain chemicals from adhesives, paints and varnishes, posing environmental risks if not treated properly.

Furthermore, washing and finishing processes generate liquid effluents that may contain organic and inorganic contaminants. These effluents include organic solvents, heavy metals, paints, and varnishes, the presence of which poses a significant risk to the environment, especially when disposed of improperly ( Canizares et al., 2008; Ehsani et al., 2020). Furthermore, they are classified as class I waste, according to the NBR 10004 classification, which is included in the National Environmental Council (1988), and are considered hazardous waste (CONAMA, 1988). The treatment of these liquid wastes is essential and may involve physical, chemical, and biological processes to neutralize pollutants before disposal (Rodrigues et al., 2015). The implementation of effective effluent treatment systems is crucial to minimize environmental impact and comply with environmental regulations ( Gordi et al., 2014).

In Brazil, waste management is regulated by specific laws and standards. The National Solid Waste Policy (PNRS), established by Law No. 12,305/2010, establishes guidelines for the management of solid and hazardous waste, including liquid waste. Regulatory Standard No. 25 (NR 25) addresses the disposal of industrial waste, seeking to ensure worker safety and environmental protection. ANTT Resolution No. 420 regulates the transportation of hazardous products and waste, preventing the contamination of water bodies and soil (Brasil, 2010; Santibañes -Aguilar et al., 2013).

Uncontrolled urban growth also exacerbates environmental challenges by increasing soil impermeability, surface runoff, and pollutant loads in rivers. These issues require coordinated actions, such as sewage treatment, sustainable agricultural practices, and monitoring of industrial activities to protect river basins (PRO-SINOS, 2020).

The furniture industry in the Sinos River Basin contributes to these challenges by generating liquid and solid waste. Finishing and surface treatment processes produce effluents with organic solvents, heavy metals, and other chemical compounds that, if improperly disposed of, contaminate water bodies. In addition, solid waste, such as wood chips and sandpaper dust, can contain toxic substances, aggravating soil and water pollution. These factors highlight the importance of rigorous and sustainable environmental practices to protect the ecological integrity of the basin (Nunes et al., 2015; COMITESINOS, 2019).

To mitigate these impacts, furniture companies can adopt several sustainable practices. Implementing effluent treatment systems is essential to prevent contamination of water bodies. Cleaner production technologies and eco-efficiency can also reduce waste generation and the consumption of natural resources. The use of certified raw materials, such as wood from sustainably managed forests, contributes to the preservation of ecosystems and biodiversity.

Furthermore, investing in renewable energy sources, such as solar and biomass, can reduce carbon emissions. Employee training on sustainable practices and obtaining environmental certifications, such as ISO 14001, help structure and monitor environmental management, promoting sustainability in the sector (Moraes et al., 2018; Rodrigues et al., 2019; Hinata et al., 2023). Such measures not only reduce environmental impacts but also strengthen the image of companies before consumers and investors, who are increasingly aware of corporate environmental responsibility ( Ehsani et al., 2020).

Finally, the objective of this study was to map the furniture industries located in the Rio dos Sinos Basin, identifying the areas of greatest industrial concentration.

3 METHODOLOGY

3.1 DESCRIPTION OF THE SITE

The Rio dos Sinos Hydrographic Basin, located in the Guaiba hydrographic region, in the northeast of Rio Grande do Sul, covers an area of approximately 3,746.68 km2. The basin is composed of 32 municipalities in its entirety, and is characterized by an abundant geomorphological diversity. The Rio dos Sinos, approximately 190 km long, originates in the municipality of Caraá and flows into the Jacuí delta, in Canoas. The basin plays a crucial role in supplying water to the local population and in maintaining aquatic ecosystems, although it faces significant challenges related to pollution and sustainable management of water resources (COMITESINOS, 2019).

The basin currently faces several significant environmental problems, including pollution from domestic and industrial sewage, which results in the release of large quantities of untreated sewage directly into the river, degrading water quality. The highly industrialized region contributes industrial waste, such as heavy metals and chemicals, exacerbating pollution. Intensive agricultural activity uses pesticides that are carried into waterways, affecting water quality and the health of aquatic ecosystems. Uncontrolled urban growth increases soil impermeability, increasing surface runoff and the load of pollutants into the river. In addition, recurring fish kills, caused by low oxygenation in the water due to pollution, indicate a serious ecological imbalance. These problems require coordinated environmental management actions, such as increased sewage treatment, implementation of sustainable agricultural practices, and strict monitoring of industrial activities to mitigate negative impacts on the watershed (AyresPeres et al, 2006; Hinata et al., 2023; Nunes et al., 2019). Intensive agricultural activity uses pesticides that are carried into watercourses, affecting water quality and the health of aquatic ecosystems (SEMA, 2015).

3.2 INDUSTRIAL MAPPING

The 32 municipalities that are bathed by the Sinos River Basin were selected, namely Araricá , Cachoeirinha, Campo Bom, Canela, Canoas, Capela de Santana, Caraá , Dois Irmãos, Estancia Velha, Esteio, Gramado, Igrejinha, Ivoti, Nova Hartz, Nova Santa Rita, Novo Hamburgo, Osorio, Parobé, Portão, Riozinho, Rolante, Santo António da Patrulha, São Francisco de Paula, São Sebastião do Cai, São Leopoldo, Sapucaia do Sul, Taquara and Três Coroas (SEMA, 2015). Afterwards, an online search was carried out for the furniture industries located in each city. The research resulted in a total of 83 industries, which had their geographic coordinates identified for the creation of maps using the ArqGis platform .

Currently, there is no database that provides consolidated information on the number and location of furniture industries in this region. Therefore, the search was directed to the websites of city halls, furniture industry associations and the Google platform. After compiling the data obtained, a check was performed on Google Earth to confirm whether the identified locations actually corresponded to industrial facilities. The inclusion criteria for the selection were that they be furniture industries and/or furniture manufacturers, which were located in the municipal region bathed by the basin in question. The size of the companies was not limited, so all of them could be included.

3.3 ARQGIS PLATFORM

ArcGIS is a Geographic Information System (GIS) platform developed by Esri, widely used for analysis, visualization and management of geospatial data. The tool allows the creation of thematic maps and advanced spatial analyses. One of its most popular features is the creation of heat maps, which help identify spatial patterns and analyze the distribution of phenomena, and are applied in areas such as security, health and urban planning (Davis Junior, 1997; González et al., 2008).

Generating heat maps in ArcGIS involves steps such as importing georeferenced data, using tools such as Kernel Density, and configuring parameters such as search radius and symbology. Visualization is enhanced with color gradients that highlight concentrations of phenomena. These maps are powerful tools for understanding and communicating complex information in an intuitive way. In the scientific and professional context, their application promotes more efficient and detailed analysis, contributing to strategic solutions in different sectors (Martinelli, 2006; Gaspar, 2005).

4 RESULTS AND DISCUSSIONS

Based on the survey carried out, the spatial distribution of the industries catalogued on the Google Earth platform was carried out, and these were inserted into the ArcGis platform , for the development of two maps.

The image presents a thematic map that shows the spatial distribution of furniture industries in the Rio dos Sinos Basin, located in the state of Rio Grande do Sul, Brazil. The Rio dos Sinos Basin is outlined, demarcating its geographic limits. A significant concentration of furniture industries can be observed along the course of the river and in the vicinity of urban areas, mainly in the southwest. This distribution pattern may suggest a possible relationship between the location of the industries and the accessibility provided by the urban infrastructure and proximity to water resources. The graphic scale and geographic orientation (indicated by the arrow pointing north) facilitate the spatial understanding of the study area. The cartographic base was obtained from reliable sources, such as IBGE and ANA, and uses the SIRGAS 2000 Datum , ensuring accuracy in the geospatial data . Below, another map of the basin in question is presented.

The image shown shows a density map that illustrates the spatial variation of a variable, possibly the density of furniture industries in the Rio dos Sinos Basin. It can be seen that the highest density is concentrated in the southwest portion of the basin, indicating that this area is home to most of the phenomenon analyzed. This concentration may be related to attractive factors for industrial installation, such as adequate infrastructure, access to consumer markets or proximity to natural resources.

The spatial distribution of these data allows inferences about potential environmental and socioeconomic impacts, considering that industrial activity can affect the quality and availability of water resources in the basin. These density patterns are crucial for territorial planning and environmental management, since areas with high industrial concentration require specific policies for pollution control and the sustainable use of natural resources. The cartographic base used, derived from sources such as IBGE and ANA, adopts the SIRGAS 2000 Datum , ensuring geospatial precision and reliability for scientific analyses and environmental planning.

The results of this study show a significant concentration of furniture industries in the southwest of the Rio dos Sinos Basin. This location suggests a correlation between the presence of these industries and the availability of urban and water infrastructure. The proximity of water resources facilitates access to water needed for industrial processes, but also increases the risk of contamination due to inadequate effluent disposal.

Spatial analysis revealed that areas with higher industrial density coincide with environmentally vulnerable regions. In these areas, pollution from solid and liquid waste can compromise water quality and the health of aquatic ecosystems. These findings reinforce the urgency of rigorous public policies and environmental management practices to mitigate the negative impacts of industrial activity. The lack of consolidated databases on the location and number of furniture industries in the region points to a significant gap in environmental monitoring and water resource management.

The water footprint is a relevant metric for assessing the impacts of the furniture industry on the availability and quality of water resources in the basin. The blue water footprint, which refers to the consumption of surface and groundwater, is especially significant, since the industries use large volumes of water in processes such as washing materials, cooling machines and applying finishes. The green water footprint, which considers rainwater stored in the soil and used by plants, is relevant for the production of furniture that depends on the use of wood.

Furthermore, the gray water footprint, which estimates the volume of water needed to dilute pollutants and maintain quality within acceptable standards, is crucial for assessing the impacts of liquid effluents generated by these industries. These effluents, often composed of solvents, heavy metals and other pollutants, pose significant environmental risks when not treated properly. Thus, measuring the gray water footprint allows us to understand the pollutant load and the need for effective effluent treatment systems (Silva et al., 2013).

The integration of water footprint analysis into the environmental management of the furniture industry can encourage more sustainable practices. These include reducing water consumption, recycling effluents, and adopting cleaner production technologies. Such practices contribute to mitigating environmental impacts and preserving water resources in the Sinos River Basin. Using the water footprint as a planning tool offers a holistic approach, allowing the development of effective strategies for the sustainable management of the region (Rodrigues and Gomes, 2024).

Several sustainable management practices have been adopted by the furniture industry to mitigate environmental impacts, mainly related to liquid waste. Effluent treatment, through physical, chemical and biological processes, is an essential measure to remove contaminants before disposal. Practices such as recycling solvents and replacing traditional chemical products with environmentally friendly alternatives, such as water-based paints, are also recommended to reduce environmental impacts (Johann et al., 2022).

The implementation of environmental management systems, such as ISO 14001 certification, contributes to the monitoring and continuous improvement of waste management practices. In addition, training and awareness programs for employees are essential to ensure that best disposal and treatment practices are applied on a daily basis ( Indrawati et al., 2018).

For future studies, it would be interesting to measure water pollution rates or environmental quality indicators in areas close to the highest industrial densities. It would also be relevant to collect information on the waste treatment infrastructure of the mapped companies or to perform an integrated analysis with land use data. These approaches could provide more robust insights into the interactions between industrial activity and the basin's ecosystems. Finally, it would also be worth conducting further studies on furniture activity in the southwestern portion of the basin, where we find its highest concentration.

5 CONCLUSION

The results obtained in this study demonstrate the significant concentration of furniture industries in the southwestern portion of the Rio dos Sinos Basin, highlighting the influence of urban infrastructure and proximity to water resources on the spatial distribution of these industries. However, this industrial concentration also raises environmental concerns, especially in relation to water pollution caused by inadequate effluent disposal.

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