Search Results (135)

Studying the impact of different tillage practices on crop water consumption can help us identify optimal tillage practice choices. The traditional tillage (TT) and conservation tillage (CT) methods are the dominant practices in Jilin Province, China. Few studies have explored the differences in crop water consumption between TT and CT. To address this knowledge gap, this study utilized maize as its research object and employed the water footprint (WF) as the indicator to assess crop water consumption under TT and CT. This study aimed to investigate when differences in water consumption between TT and CT appear and whether the differences are significant. The results of this study demonstrated that the total WF under CT (339.65 m³ t⁻¹) was less than that under TT (378.19 m³ t⁻¹), and the spatial difference was distinct. The total WF exhibited a clear change under different CT durations. At the initial stage of CT implementation, the total WF decreased slightly compared to that under TT. With an increase in CT duration, the total WF was significantly reduced. The findings of this study demonstrate that CT is an effective measure to ensure sustainable crop production and that it could lead policymakers to choose CT to reduce water consumption. Full article

The determination of the actual crop water requirement (CWR) today represents an important prerogative for combating climate change. A three-year trial was conducted to ad-dress the need to provide adequate support to processing tomato growers in defining the correct amounts of water to be supplied. In fact, the objective of this work was to calculate the water requirement of processing tomatoes, specifically analyzing their irrigation needs using the CROPWAT 8.0 software and through capacitive and tensiometric probes. Furthermore, for both methods, the tomato yield was evaluated both by supplying 100% of its water requirement and by supplying, through regulated deficit irrigation (RDI), 70% of its water requirement. Subsequently, for each irrigation strategy employed and for each CWR calculation method, the water footprint was calculated by analyzing the blue, green, and grey components. In the years 2022 and 2023, there was an overestimation of CWR of 13.5% for IR100 and 13.94% for IR70, and 14.53% for IR100 and 11.65% for IR70, respectively, while in 2024 there was an underestimation, with values of 9.17% and 5.22% for the IR100 and IR70 treatments compared to the values obtained with the probes. The total WF of tomatoes varied between 33.42 and 51.91 m³ t⁻¹ with the CROPWAT model and between 35.82 and 47.19 m³ t⁻¹ with the probes for IR100, while for RDI70, the values ranged between 38.72 and 59.44 m³ t⁻¹ with the CROPWAT method and between 35.81 and 53.95 m³ t⁻¹ with the probe method. In water-scarce regions, integrating the CROPWAT 8.0 model (enhanced with real-world data) and implementing smart systems can significantly improve water management, refine decision-making processes, and mitigate environmental impacts. This approach directly addresses the urgent need for water security within sustainable agriculture. Full article

Italy is a global top wine producer, with emphasis on high-quality wines. This study investigates the Carbon Footprint (CF), Water Footprint (WF), and Ecological Footprint (EF) of twelve red wine producers in Piedmont, Northern Italy. The analysis was based on a 0.75 L wine bottle as functional unit (FU). Twelve producers were interviewed and given questionnaires, which made it possible to gather primary data for the environmental evaluation that described vineyard and agricultural operations and wine production. The average CF was 0.88 ± 0.3 kg ${CO}_{2eq},$ with 44% of CF associated with the glass bottle, 20% to the diesel fuel fed to the agricultural machines, 32% to electricity consumption, and 4% to other contributions. The average WF was 881 ± 252.4 L, with 98% Green WF due to evapotranspiration, and 2% Blue and Grey WF. The average EF was 81.3 ± 57.2 global ha, 73% ascribed to the vineyard area and 27% to CO₂ assimilation. The obtained CF and WF values align with existing literature, while no comparison is possible for the EF data, which are previously unknown. To reduce the environmental impacts of wine production, actions like using recycled glass bottles, electric agricultural machines and renewable energy can help. However, high-quality wine production in Piedmont is deeply rooted in tradition and mostly managed by small producers. Further research should investigate the social acceptance of such actions, and policies supporting economic incentives could be key enablers. Full article

One of the most important factors affecting water resources is livestock development. This study focuses on estimating the water demands of beef and dairy cattle breeding, as well as the corresponding products, in the Regional Unit of Karditsa (Greece), while simultaneously assessing the pollution caused by this activity in water bodies. The impacts are measured using the water footprint (WF) approach across its three dimensions (green, blue, and gray), considering the quantity of feed and water utilized by each animal type and the production system applied in the research area. For beef production, the intensive system shows a total WF of 90,535 m³/ton (gray 88%, green 9%, blue 3%), while the semi-intensive system totals 82,027 m³/ton (gray 84%, green 12%, blue 4%). For dairy cows, the total WF reaches 2750 m³/year/ton of milk (gray 81%, green 14%, blue 5%). Gray WF was estimated based on pollutant loads from livestock waste using concentration thresholds for biochemical oxygen demand (BOD₅), nitrogen (N), and phosphorus (P), providing a clearer view of water quality degradation linked to livestock activities. These findings can guide regional directorates in addressing key water-related pressures from livestock production. Full article

Water resources are a key constraint on sustainable development in arid regions, especially for agricultural production where water use is intensive. To assess the sustainability of agricultural water use in such environments, this study utilizes 2010–2020 agricultural data from the Turpan–Hami Basin and is among the first to integrate the water footprint (WF) theory with the DPSIR (driver–pressure–state–impact–response) model into a comprehensive framework for evaluating water resource sustainability in arid agricultural systems. The agricultural blue, green, and grey WF in the Turpan–Hami Basin were quantified for 2010–2020, followed by a sustainability assessment under the DPSIR framework using a comprehensive weighting method. The results showed a continuous increase in the WF, dominated by the blue WF (>60%), largely due to crops like cotton and grapes, intensifying regional water stress. Turpan experienced prolonged resource overload, while Hami exhibited slightly higher sustainability. DPSIR analysis revealed stronger policy responses in Turpan and significant ecological investments in Hami. Key influencing factors included the crop yield, WF modulus, per capita WF, and water quality shortage index. Overall, sustainability in the basin fluctuated between “Basically Sustainable (Level III)” and “Insufficiently Sustainable (Level IV)”, with slight improvement in 2020. The findings highlight the need for region-specific agricultural optimization, strengthened ecological governance, and improved water-saving strategies to enhance water use efficiency and sustainability in arid regions. Full article

It is of great significance to optimize water resource management and promote sustainable development in the Tarim River Basin (TRB) by using the water footprint (WF) evaluation method to evaluate the water shortage of fruit trees in the TRB and analyse its water-saving potential. This study aimed to elucidate the WF spatial–temporal distribution characteristics of fruit trees in the water-limited TRB from 2000 to 2020 and evaluate their water-saving potential capability. The WF was calculated using a combination of irrigation technology simulation and water usage assessments for four different fruit trees (apple, pear, date, and walnut). The results indicate that the green WF (WF_green) initially increased and then decreased, reaching its lowest value of only 175.09 m³/t in 2020, and decreased by 22.71% from 2000 to 2020. WF_blue decreased by 47.13% over the same period. In 2020, the WF_blue of date and walnut accounted for a higher percentage of WF_blue. WF_blue significantly exceeded WF_green, indicating their high water consumption and the limited adoption of water-saving technologies in the study area. Due to the increase in fruit tree planting area and fertilization, WF_grey exhibited an overall upward trend. Meanwhile, the total WF (WF_total) indicated a general downward trend, though the walnut tree had the highest WF_total at 2.21 × 10⁵ m³/t, indicating the popularization of water-saving technology. The results show that, taking 2020 as the baseline, the WF_blue of the four fruit trees in the TRB was 2.64 × 10⁵ m³/t (accounting for 89.1%), total WF_blue decreased by 0.73 × 10⁵ m³/t (a decrease of 48.38%) after drip irrigation, and the water-saving potential in the five prefectures of the TRB was in the range of 38.55–56.18%. Therefore, the promotion of drip irrigation technology plays a key role in alleviating the water pressure of fruit trees and promoting the sustainable utilization of water resources in the TRB. Full article

Agricultural production is responsible for most of the withdrawal of water volume. There has been increasing the pressure on stakeholders to adapt water usage behavior and manage water resources. In this context, water footprint management (WFM) practices have been implemented. Despite the positive benefits of the adoption of WF practices, the selection and prioritization of WFM practices remains a challenge. In addition, the effects that each of these individual practices have on reputation and legitimacy have not been investigated. To fill these research gaps, this study determined the relative priority of seven different WFM practices and the relative importance of each of these practices to increase agri-food firms’ reputation and legitimacy. This study applied the best–worst method (BWM) with a set of expert Chilean professionals in the field. The practice related to the promotion of the measurement of the water footprint throughout the supply chain was considered the most vital and the one with the greatest effects on firms’ reputation and legitimacy. The practice related to the establishment of water auditing and control systems was considered the least important and the one that generates lower effects on firms’ reputation and legitimacy. Our study also found that lack of financial resources is the main barrier to WFM implementation. These findings are useful for companies that are not capable of developing a complete program of WFM adoption due to lack of resources to implement all these practices. By knowing the importance of each practice, farmers can select the practices that will bring the greatest benefits. Full article

It is urgent for the wastewater treatment sector to respond to global climate change. Although studies related to the water–energy–carbon (WEC) nexus have been widely conducted, the application of the coupling coordination indicator is still limited in the wastewater treatment sector. This study fills such a research gap by linking water footprint (WF), energy footprint (EF), and carbon footprint (CF) together and testing these indicators in 140 wastewater treatment plants (WWTPs) in Shandong province, China. Both the EF and CF of these WWTPs were calculated by conducting hybrid life cycle assessments, while WF was calculated by using a WF method. The results show that gray WF generated from 1 m³ of wastewater ranged from 9.58 to 12.90 m³, while EF generated from 1 m³ of wastewater ranged from 9.42 × 10⁻² to 0.22 kg oil eq and CF generated from 1 m³ of wastewater ranged from 0.58 to 1.27 kg CO₂ eq. Also, the total WF, EF, and CF of these WWTPs in Shandong were 4.26 × 10¹⁰ m³, 5.32 × 10⁸ kg oil, and 3.35 × 10⁹ CO₂ eq in 2021, respectively. Key factors contributing to the overall greenhouse gas (GHG) emissions were the on-site GHG emissions and off-site electricity-based GHG emissions. Meanwhile, total nitrogen was the dominant contributor to the gray WF. In addition, the coupling coordination indicators of WF, EF, and CF ranged from 0.7571 to 0.9293. Finally, this study proposed several policy recommendations to improve the overall sustainability of this wastewater treatment sector by considering local realities, including adopting multi-dimensional indicators, decarbonizing current electricity grids, promoting the utilization of renewable energy, and initiating various capacity building efforts. Full article

Livestock production systems are major consumers of freshwater, potentially compromising the sustainability of water resources at production sites. The water footprint (WF) quantifies the water consumed and polluted by a product or service. The aim of this study was to evaluate the WF of steer production from the cradle to the farm gate in representative intensive, extensive, and mixed farms located in the southeast of Buenos Aires province, Argentina. The WF to produce a live steer varied between 4247 and 5912 m³/animal. The extensive system contains the highest green WF but is also the most sustainable compared to industrial and mixed productions since it does not have an associated pollutant load or blue water. This work is the first approach to calculating the WF of live steers in Argentina carried out with local and detailed data and focuses on grey WF related to nitrogen leaching from effluents in intensive systems, showing that the blue and grey footprints increase as production intensifies. The information may be relevant for consumers and producers to make more informed decisions. Furthermore, it is essential for governments to promote sustainable practices in livestock farming, recognizing the dependence on water resources both domestically and throughout international supply chains, in order to assess their environmental policies and ensure national food security. Full article

The economic inequalities impede the equal distribution of water among various household groups, potentially leading to inequal access to this vital resource. By integrating a multi-regional input–output model with household expenditure, we investigate the water footprint (WF) for ten income groups in each of the provinces and evaluate water inequality among regions, households, and expenditure categories comprehensively. Our findings reveal significant disparities in water footprints, with urban households exhibiting nearly three times the WF of rural residents. Wealthier eastern provinces show higher per capita consumption-based WFs compared to the less developed western regions. The interregional trade exacerbates water inequality because water-intensive goods are produced in less developed regions and are being consumed in more developed provinces. This study underscores the importance of targeted policies to address water inequality, achieve sustainable water management, and promote equitable water use in the face of increasing water demand and supply imbalances. Full article

Straw return is an effective agricultural measure that influences the ecological environment. In the context of global climate change and the need for sustainable development, it is essential to explore how straw return methods affect the environment. This study conducted a two-year field experiment comparing different straw return treatments: no straw return (CK), straw return directly (SR), and straw returned in deep ditches (ISR). The results showed that SR treatment increased soil dissolved organic carbon (DOC) (21.7~25.8%) and dissolved organic nitrogen (DON) (8.5~43.8%) compared to CK. The ISR treatment significantly enhanced DOC (13.1~33.0%) and DON (14.2~50.8%). Both SR and ISR treatments also improved maize growth indicators, such as leaf area index (LAI), stem biomass, leaf biomass, and grain biomass. In terms of environmental effects, the ISR measure reduced N₂O emissions and significantly lowered the carbon footprint (CF) and water footprint (WF). Specifically, the yield-scale carbon footprint (CF_y) and yield-scale water footprint (WF_y) of ISR were reduced by 12.0% and 9.1%, respectively, in 2023. Correlation analysis revealed that soil DON and DOC were key factors in these environmental benefits. Furthermore, the reduction in WF and CF was closely linked to the increased SWC and higher biomass in all maize organs. Therefore, we demonstrated that the ISR measure not only promotes maize biomass accumulation but also effectively mitigates carbon emissions and water consumption on farmland. It may be related to the boosting soil DON and DOC levels. Overall, the ISR method holds promise for supporting sustainable farming practices. Full article

Background/Objectives: The water footprint (WF) provides information on the impact of individual foods on water consumption, but to better direct food production toward water saving, we need to understand how to reduce the WF of our diets while keeping it healthy. In this study, we compared the WF of healthy diets based on national food-based dietary guidelines with the aim of highlighting changes in dietary patterns that could reduce water requirements without compromising nutritional adequacy. Methods: Three 2000 kcal/day dietary patterns were elaborated following the Italian, Spanish, and American dietary guidelines, and their total, green, blue, and grey WFs were calculated. Results: The Italian dietary pattern showed the lowest total WF (2806 L per capita/day), with the American and Spanish patterns being 8% and 10.5% higher, respectively. The food groups contributed differently to the total WF. In the USA, animal foods were the main contributor (56% versus 41% in Spain and 38% in Italy). The contribution of plant foods was higher in Italy (61%) than in Spain (54%) and the USA (38%). The distribution of the total WF between WF_green, WF_blue, and WF_grey was similar across the dietary patterns. Within each food group, and mainly in the animal-origin food group, the type of product significantly modulated the WF. Conclusions: Different diets can be equally nutritionally sustainable but have different impacts on environmental sustainability. The comparison of their WFs can be the starting point to promote dialogue between nutritionists, operators in the environmental sector, and the agri-food industry to ensure a healthy and balanced approach. Full article

The olive oil supply chain generates a substantial number of by-products, presenting significant environmental, economic, and social challenges. However, these by-products, such as pomace, wastewater, and biomass, also offer valuable opportunities for implementing a circular economy (CE) model that enhances sustainability. Despite increasing attention to the valorization of these by-products, understanding of the indicators used to measure circularity in this context remains limited. This systematic review examined the existing literature on circular economy indicators employed to assess the use of by-products in the olive oil supply chain. The aim was to provide a comprehensive overview of the most suitable indicators in this sector, while identifying best practices for quantifying and monitoring progress towards a more circular system. The review followed the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines, and bibliometric analysis was conducted using CiteSpace 6.4 R1 software. The results highlighted a key indicator, the Material Circularity Indicator (MCI). Additionally, methodologies such as Life Cycle Assessment (LCA) and water footprint (WF) were evaluated, while challenges were identified, including the need for standardized metrics and improved data collection across the supply chain. This review provides valuable insights for both future research and policy decisions aimed at promoting sustainability and circularity in the olive oil industry. Full article

The concept of the water footprint (WF) has not adequately explored the combined effects of climate change and salinity. For this aim, the effects of future climate conditions on tomato WF irrigated with moderately saline water (EC = 2.9 dS m⁻¹) were examined, considering an expected increase in salinity reaching 5.9 dS m⁻¹ by 2050. Reference evapotranspiration (ETo), effective rainfall (ER), tomato crop evapotranspiration (ETc), leaching requirement (LR), net irrigation requirement (NIR), and tomato yield were estimated using CropWat and AquaCrop models. The blue (WFBlue), green (WFGreen), gray (WFGray), and total WF (TWF) were calculated. Results showed that ETo, ETc, and ER are expected to increase, while tomato yields will show a slight decrease. NIR is expected to increase depending on climate change scenarios and the increasing salinity of water irrigation. Calculated WF components showed significant increases, which consequently led to an increase in WFT exceeding the Tunisian national and regional levels by 15% and 18% between 2023 and 2050 under two scenarios, RCP4.5 and RCP8.5. The results highlighted the importance of WF for developing adaptation strategies to manage limited water resources, while advanced research on a large scale based on smart assessment tools is required to find best practices for water use reduction. Full article

Aquaculture is a rapidly growing industry that contributes to the growing global demand for food. Numerous studies have investigated the necessity of increasing food production while reducing its negative effects on the environment. Aquaculture involves the cultivation of aquatic animals such as fish, shrimp, and mollusks that require water for their growth and maintenance in various types of aquaculture operations, such as recirculated aquaculture systems (RASs), ponds, and sea cages. This study investigates mainly life cycle assessment (LCA) in relation to water consumption, the water footprint (WF) and water budgeting approaches in aquaculture. In addition, it contributes to the expansion of knowledge and understanding of the different methodologies used, production practices, types of water (freshwater, marine or brackish) and direct or indirect water consumption in intensive, semi-intensive and extensive types of aquaculture. Notably, this study focuses on water consumption and does not include water indices that account for all the water used in a system, regardless of whether it is returned to the sourced watershed and is therefore available for other uses. Approximately 15% of the reviewed studies focus on the fish processing stage of the production chain, which emphasizes the need for more research on this stage. The species of carp, tilapia, shrimp, and catfish are the most frequently studied aquatic animals in relation to water consumption in aquaculture. Research on water consumption patterns can contribute to the development of a more water-efficient aquaculture system that is essential for promoting sustainable practices. Full article