Sustainable Management Policies Research Articles

Revisiting the challenge: perspectives on Canada’s freshwater fisheries policies three decades after the Pearse Report

A seminal report by Peter H. Pearse (1988; Rising to the Challenge: A New Policy for Canada’s Freshwater Fisheries, Canadian Wildlife Federation, Ottawa) outlined 62 policy recommendations focused on the management of Canada’s inland fisheries. Over three decades later, freshwater ecosystems and inland fisheries in Canada are still facing similar challenges with many emerging ones that could not have been foreseen. Here, we reflect on the contemporary relevance of the Pearse Report and propose recommendations that policy makers should consider. Broadly, our recommendations are: (1) manage fishes, fisheries, and habitat using a holistic co-management framework, with clearly defined fishery jurisdictions and partnerships with Indigenous governments; (2) engage in transparent, inclusive, and agile research to support decision-making; (3) facilitate knowledge co-production, involving interdisciplinary projects with diverse groups of actors and sectors including Indigenous Peoples, anglers, policy makers, scientists/researchers, governments, and the public; (4) embrace technological advances to support freshwater fisheries stock assessment and management; and (5) align policy and management activities in Canada with global initiatives related to increasing the sustainability of inland fisheries. We advocate for an updated comprehensive report such as the Pearse Report to ensure that we embrace robust, inclusive, and sustainable management strategies and policies for Canada’s inland fisheries for the next 30 years. It is time to again rise to the challenge.

Cultural landscape management through the application of environmental certifications

Environmental certifications are a tool that aims to measure and evaluate the environmental quality of buildings and their surroundings, with potential collaboration in urban planning. Among the various cultural landscapes that constitute the cities, the historical landscapes can report unique images of urban places, acting as testimonies of the past, which establish connections with the present and serve as reference for the construction of the future. Thus, the need to work the heritage field in sustainable urban management policies is demonstrated. Based on analytical research in the fields of environmental certification and cultural landscape, and documentary research on the Urban-Landscape Set on Avenida Köeler, in the Historic Center of Petrópolis/RJ, the possibility of certifying the set through AQUA/HQE - Neighborhoods was assessed. The aim of this study is to investigate the potential of the environmental certification instrument with regard to the maintenance of historical and cultural values ​​and to the physical conservation of this complex. In addition to meeting the objectives and indicators, the opportunity to establish an urban management program to achieve with excellence the performance of high environmental quality is evident. This study also shows that when analyzing the certification guidelines, as far as the cultural dimension is concerned, a review is needed to better cover the heritage issue, to establish specific guidelines for the conservation of existing landscapes as an incentive to the preservation and promotion of urban quality for current and future generations.

Spatio-Temporal Changes of Land Use / Land Cover Classes in the Urban Wetland Area of Yenagoa Local Government Area of Bayelsa State, Nigeria

The study analyzes land use /land cover changes (LULC) using landsat5 TM, landsat 7 ETM and landsat OLI images of 1990,2000, 2010 and 2020.Through this study, the pattern of urban expansion for 30 years has been studied and changes in the distant future (30 years from now) have also been predicted. The satellite images covering the area were acquired and analyzed using ArcGIS10.3 and ENVI 5.0. A total area of 13741.4 hectares was delineated in the study area which is identified as Yenagoa’s urban area. After processing the imagery, four land use/land cover LULC classes where developed, and the results shows that Built-up area continuously increased in land area from 1990 -2020 with total %change of 273.31%(4178.7Ha) and total annual rate of change of 25.33 ,Vegetation over have total %change of 38.55% (974.34Ha) and total annual rate of change of 3.85, wetland cover loss with total %Change of -61.96%(-5144.99Ha) and total annual rate of change of -6.19, and the water body have loss of total % of -2.16% (-8.05Ha) and total annual rate of change of -0.22. The study recommended that actual monitoring of wetland be employed using modern techniques such as GIS and Remote Sensing and also the traditional methods of conserving wetland ecosystem with appropriate wetland laws and legislation policies for sustainable management in conservation of wetland ecosystem.

Formulation of Water Sustainability Index for India as a performance gauge for realizing the United Nations Sustainable Development Goal 6.

Anthropogenic activities targeting economic progress have triggered changes in the Earth system processes causing depletion of resources and degradation of ecosystems. Water isa critical natural resource whichhas been severely impacted through groundwater depletion, surface water contamination and ocean acidification resulting in repercussions on human health and biodiversity losses. Likewise, India, a mega biodiversity nation has been critically affected by degradation and drawdown of water resources with far-reaching consequences on environmental vitality and socio-economic development. In order to prevent extreme water scarcity in the near future, the country needs to promote sustainable utilisation of water resources by adhering to the targets of Goal 6 of the United Nations Sustainable Development Goals (UN-SDGs). The present work, therefore, has focussed on the development of a Water Sustainability Index (WSI) for India that would help attaining the targets of SDG 6. A total of 12 indicators categorized under biophysical and social development dimensions and synonymous with the targets of SDG 6 have been used for the formulation of WSI and thereby understanding how much water resources are used annually in a sustainable manner. The study also highlights the interrelationship between the diverse social development and health indicators (SDG 3) of Indian community. The research has the potential to provide guidance for efficient use of water resources in India. Acting as a yardstick and guiding star, the sustainability metric will help the nation to monitor whether it is on the right track and navigate its journey towards achieving water sustainability. It also calls for cautious course correction and restructuring of current Indian policy and operational instruments for effective green governance and sustainable water management.

A Machine Learning Approach to Predict Groundwater Levels in California Reveals Ecosystems at Risk

Groundwater dependent ecosystems (GDEs) are increasingly threatened worldwide, but the shallow groundwater resources that they are reliant upon are seldom monitored. In this study, we used satellite-based remote sensing to predict groundwater levels under groundwater dependent ecosystems across California, USA. Depth to groundwater was modelled for a 35-years period (1985–2019) within all groundwater dependent ecosystems across the state (n = 95,135). Our model was developed within Google Earth Engine using Landsat satellite imagery, climate data, and field-based groundwater data [n = 627 shallow (< 30 m) monitoring wells] as predictors in a Random Forest model. Our findings show that 1) 44% of groundwater dependent ecosystems have experienced a significant long-term (1985–2019) decline in groundwater levels compared to 28% with a significant increase; 2) groundwater level declines have intensified during the most recent two decades, with 39% of groundwater dependent ecosystems experiencing declines in the 2003–2019 period compared to 27% in the 1985–2002 period; and 3) groundwater declines are most prevalent within GDEs existing in areas of the state where sustainable groundwater management is absent. Our results indicate that declining shallow groundwater levels may be adversely impacting California’s groundwater dependent ecosystems. Particularly where groundwater levels have fallen beneath plant roots or streams thereby affecting key life processes, such as forest recruitment/succession, or hydrological processes, such as streamflow that affects aquatic habitat. In the absence of groundwater monitoring well data, our model and findings can be used to help state and local water agencies fill in data gaps of shallow groundwater conditions, evaluate potential effects on GDEs, and improve sustainable groundwater management policy in California.

Smart Technologies for Sustainable Water Management: An Urban Analysis

As projections highlight that half of the global population will be living in regions facing severe water scarcity by 2050, sustainable water management policies and practices are more imperative than ever. Following the Sustainable Development Goals for equitable water access and prudent use of natural resources, emerging digital technologies may foster efficient monitoring, control, optimization, and forecasting of freshwater consumption and pollution. Indicatively, the use of sensors, Internet of Things, machine learning, and big data analytics has been catalyzing smart water management. With two-thirds of the global population to be living in urban areas by 2050, this research focuses on the impact of digitization on sustainable urban water management. More specifically, existing scientific literature studies were explored for providing meaningful insights on smart water technologies implemented in urban contexts, emphasizing supply and distribution networks. The review analysis outcomes were classified according to three main pillars identified: (i) level of analysis (i.e., municipal or residential/industrial); (ii) technology used (e.g., sensors, algorithms); and (iii) research scope/focus (e.g., monitoring, optimization), with the use of a systematic approach. Overall, this study is expected to act as a methodological tool and guiding map of the most pertinent state-of-the-art research efforts to integrate digitalization in the field of water stewardship and improve urban sustainability.

Sustainable intelligence and cultural worldview as triggers to preserve heritage tourism resources

This empirical study examines residents’ decision-making process in preserving Jeju Batdam as a World Agricultural Heritage Site. Accordingly, it extends the model of goal-directed behavior (MGB) by including cultural worldview and sustainable intelligence as triggers of desire and behavioral intentions of residents to preserve the agricultural heritage tourism resources. This study collected 368 valid responses from residents using quota sampling method. Results revealed that the cultural worldview and sustainable intelligence play a significant role in influencing residents’ behaviors toward the preservation of an agricultural heritage tourism resource (Batdam). Results also showed that attitude, positive and negative anticipated emotions, and perceived behavioral control increase desire, which stimulates residents’ behavioral intention to preserve the heritage. Desire mediates the effects of attitude, perceived behavioral control, and positive and negative anticipated emotions on the residents’ intention to preserve the heritage. Findings contribute to deepening the knowledge of sustainable agricultural heritage management by better understanding of residents’ decision-making process in preserving heritage resources. The outcomes of this study also provide policy implications with sustainable development and management policies of agricultural heritage sites.

Innovativity in Legislative, Political and Organizational Frameworks of Sustainable Land Management in Benin

Agricultural lands are increasingly degraded due to various human actions (overgrazing, intensive use of chemical inputs) and the consequences of climate change. In Benin, 62% of agricultural land were degraded in 2017. In this regard, Sustainable Land Management measures are highlighted by various public decisions. This study analyzed the political, legislative, and organizational frameworks of Sustainable Land Management in Benin. It was carried out through content analysis of laws, decrees, and Sustainable Land Management policy documents to highlight the place of innovativity in institutional and organizational framework in Sustainable Land Management in Benin. Results reveal that the various frameworks analyzed are oriented towards developing practice-based innovations through the implementation of Sustainable Land Management measures, support to actors in the implementation of Sustainable Land Management innovations and the monitoring and evaluation of Sustainable Land Management strategies. The capacity to innovate is also promoted through the strengthening of the technical, institutional, material, and financial capacities of the actors. On the other hand, the propensity to innovate component of Innovativity is hardly addressed in Sustainable Land Management public policies in Benin. It is therefore necessary to direct agricultural policies towards an institutionalization of the strengthening of the propensity to innovate of agricultural producers for a long-term appropriation of Sustainable Land Management measures in Benin.

Life-history traits of ten commercially important small indigenous fish species (SIFS) in the Oxbow lake (Southwestern Bangladesh): key for sound management

For the first time, we revealed the life-history traits including growth pattern (length-weight relationships, LWRs), condition factors, form factor (a3.0), first sexual maturity (Lm), age at first sexual maturity (tm), life span (tmax), natural mortality (Mw), asymptotic length (L∞), and optimum catchable length (Lopt) of ten commercially important small indigenous fish species (SIFS) in the Oxbow lake (Baor), southwestern regions of Bangladesh. A total of 1651 specimens were sampled during January to December 2020 with traditional fishing gears including seine nets, gill nets, and lift nets. Individual total length (TL) and body weight (BW) were measured by digital slide calipers and digital balance, respectively. To calculate the Lm, empirical maximum length-based model was considered, and Lopt was calculated based on L∞. The TL vs. BW relationship indicated positive allometric growth for Chanda nama (Hamilton 1822), Channa punctata (Bloch 1793), Channa striata (Bloch 1793), Lepidocephalichthys guntea (Hamilton 1822), Macrognathus pancalus (Hamilton 1822), and Puntius sophore (Hamilton 1822), but negative allometric growth for Badis badis (Hamilton 1822), Gudusia chapra (Hamilton 1822), Glossogobius giuris (Hamilton 1822), and Hyporhamphus limbatus (Valenciennes, 1847). All r2 values exceed 0.910 that indicated all LWRs were highly significant (P < 0.001). According to Spearman correlation test, Fulton's condition factor (KF) vs. BW was highly correlated (P < 0.001), indicating better well-being for these species. Moreover, a3.0 indicates B. badis, C. punctata, C. striata, G. giuris, H. limbatus, L. guntea were elongated; C. nama, P. sophore, were short and deep; G. chapra was fusiform, and M. pancalus was eel-like body shape respectively. The minimum tm and tmax were obtained as 0.74year and 2.66year for C. striata and maximum were 0.93year and 3.31year for B. badis, respectively. This study provided information on tm and tmax for ten SIFS that is globally absent. From empirical models, the smallest mean value of Lm was found for B. badis (3.98cm), and the greatest was found for C. striata (16.96cm). The minimum Lopt was obtained as 3.78cm TL for B. badis and maximum was 14.09cm TL for C. punctata. The minimum Mw was documented as 1.39 for B. badis and maximum was 1.73 for C. striata. The output of this research will be helpful for developing sustainable management policies and protection of SIFS through the application of mesh size based on Lm and Lopt in the Oxbow lakes, Bangladesh and neighboring countries.

DEVELOPMENT OF THE IM4MANILABAY MAPABLE WEB PORTAL

Abstract. Products and outputs for water quality monitoring are made available in the IM4ManilaBay MapABLE Web Portal, a web-based GIS platform that serves as a repository of processed maps for Manila Bay and linked systems. The Portal is also linked with the MASDAN mobile application that has been developed to allow the public to report different environmental issues. The web development involved the utilization of geospatial content management system, spatial database system, operating systems, programming, and style language. Services included frontend and backend development. The Web Portal serves as a repository for all outputs derived for water quality monitoring. It contains processed results, technical overview on the developed models and tools, historical data viewing and use of basic geoprocessing tools, and viewing of reported incidents from the MASDAN app. It is expected that the Web Portal will contribute significantly in the efforts of communities and environmental agencies to implement policies for sustainable development and management of Manila Bay and its watershed.

Use of Multidisciplinary Approaches for Groundwater Recharge Mechanism Characterization in Basement Aquifers: Case of Sanon Experimental Catchment in Burkina Faso

In Burkina Faso, the basement aquifers represent a major asset in terms of quantity and quality, for both drinking and irrigation purposes for rural populations. They provide water resources that can guarantee the long-term needs of the populations, provided that a sustainable management policy for these resources is adopted. Yet, any groundwater resource management policy is necessarily linked to a better knowledge of aquifer recharge mechanisms, which is yet to be fully assessed in the Sahelian basement area. The objective of this study was to characterize the recharge mechanism within the experimental site of Sanon, located in the basement zone in Burkina Faso, using a coupling of hydrodynamic and chemical approaches. The hydrodynamic approach consisted of monitoring the spatial and temporal distribution of the piezometric levels of the aquifers along a north–south and east–west transect and determining soil infiltration capacity. The hydrochemical characterization of the aquifers was carried out through an analysis of groundwater samples from the concerned aquifers and daily tracing of the electrical conductivity of the aquifer water. The cross-analysis from the results of the implemented approaches shows a direct recharge mechanism through rainwater infiltration in the central valley, an indirect recharge mechanism in the lowlands, and a recharge mechanism by lateral transfers in the peripheral aquifers of the Sanon experimental catchment. The existence of a piezometric dome reveals in the central valley a zone of preferential recharge and water movement. The water of the central valley is the least mineralized with electrical conductivities below 100 µS/cm. This mineralization follows the direction of the water flow.

Chaco region: Forest loss and fragmentation in the context of the territorial planning law. Remote sensing assessment in Formosa, Argentina application case

Agricultural expansion is the primary cause of forest loss and fragmentation. It threatens the conservation of its biodiversity as well as the capability to provide ecosystem services. Land-use policies, such as zonation programs, have been traditionally used as a tool for promoting a sustainable natural resource management; however, we still lack standardized methodologies that can be applied world-widely to achieve this purpose. In the current context of rampant deforestation over the tropical forests, there is an urgent need of identifying policies that steer agricultural land-use change into a reduced pressure on forests. This study focuses on the outcomes of the first territorial planning law in the Province of Formosa (Argentina) located within the Chaco region, one of the world’s deforestation hotspots. The research questions were: a) How did agriculture expand in Formosa before, during and after the enactment of the territorial planning law? b) Did the introduction of the law affect the spatial distribution of land-use change?; and c) How did the sanction of the law affect forest loss and forest fragmentation? Landsat imagery was used to map land-use change, and to calculate the cover loss and cover loss rate considering the zoning and physiognomic classification of the law. The forest fragmentation was evaluated in terms of forest loss spatial configuration, classified as perforation or shrinkage, forest edge generation, patch size distribution, and patch isolation. The territorial planning law effect over agricultural expansion was tested using a difference in difference model. After the law was passed, a reduced land-use pressure was observed for the forest within the conservation designated zone; however, the forest presented the highest cover loss rates among the physiognomic categories of the law. Land-use change within the conservation designated zone was predominantly made according to a perforation spatial configuration, which promoted the forest edge generation. The isolation between forest patches decreased and its size distribution changed towards a less large-patch-centered pattern, indicating that Formosa is experiencing an early fragmentation process. Overall, the territorial planning law in Formosa succeeded in the relief of land-use pressure on forest, but highlighted the need of incorporating spatial configuration guidelines for long-term forest conservation. The case of Formosa case could be useful in the design of future sustainable natural resource management policies and implies the importance of early natural resource planning.

Hydroeconomic modeling for assessing water scarcity and agricultural pollution abatement policies in the Ebro River Basin, Spain

Water scarcity and water quality degradation are major problems in many basins across the world, especially in arid and semiarid regions. The severe pressures on basins are the consequence of the intensification of food production systems and the unrelenting growth of population and income. Agriculture is a major factor in the depletion and degradation of water resources, and contributes to the emissions of greenhouse gases (GHG). Our study analyzes water allocation and agricultural pollution into watercourses and the atmosphere, with the purpose of identifying cost-effective policies for sustainable water management in the Ebro River Basin (Spain). The study develops an hydroeconomic model that integrates hydrological, economic and water quality aspects, capturing the main spatial and sectoral interactions in the basin. The model is used to analyze water scarcity and agricultural pollution under normal and droughts conditions, providing information for evaluating mitigation and adaptation policies. Results indicate that drought events increase nitrate concentration by up to 63% and decrease water availability by 42% at the mouth of Ebro River, highlighting the tradeoffs between water quantity and quality. All mitigation and adaptation policies reduce the effects of climate change, improving water quality and reducing GHGs’ emissions, thus lowering environmental damages and enhancing social well-being. Manure fertilization and optimizing the use of synthetic fertilizers are important cost-effective policies increasing social benefits in a range between 50 and 160 million Euros. Results show that irrigation modernization increases the efficient use of nitrogen and water, augmenting social benefits by up to 90 million Euros, and enlarging stream flows at the river mouth. In contrast, manure treatment plants reduce private and social benefits even though they achieve the lowest nitrate concentrations. Our study provides insights on the synergies and tradeoffs between environmental and economic objectives. Another finding is that drought conditions decrease the effectiveness of policies, and increase the tradeoffs between water availability and nitrate pollution. The results contribute to the discussion of designing cost-effective policies for the abatement of agricultural polluting emissions into water and the atmosphere.

Sustainable Supply Chain Management: Insights from Australia’s Firms

While the sustainable supply chain is an emergent area of interest, the literature provides little guidance on how best to carry out sustainable supply chain management. The purpose of this paper is to provide hints to businesses on how best to approach the challenge of developing a sustainable supply chain. Hence, the case studies method is undertaken to explore how Australia&amp;rsquo;s companies that are prominent worldwide for their sustainability performance have approached the challenge of managing sustainability in their supply chain. This study finds that sustainability action plans and governance tools that rightly reflect requisites for suppliers, diverse evaluation means to measure the suppliers&amp;rsquo; performance, and regular reviews of sustainable supply chain management practices and policies enable businesses to manage sustainability in their supply chain. The study contributes to the literature by providing a best practice model from the findings to provide practical guidance to businesses.

Evaluation of Land Use and Land Cover Change and Its Drivers in Battambang Province, Cambodia from 1998 to 2018

The main objective of this research was to evaluate land use and land cover (LULC) change in Battambang province of Cambodia over the last two decades. The LULC maps for 1998, 2003, 2008, 2013 and 2018 were produced from Landsat satellite imagery using the supervised classification technique with the maximum likelihood algorithm. Each map consisted of seven LULC classes: built-up area, water feature, grassland, shrubland, agricultural land, barren land and forest cover. The overall accuracies of the LULC maps were 93%, 82%, 94%, 93% and 83% for 1998, 2003, 2008, 2013 and 2018, respectively. The LULC change results showed a significant increase in agricultural land, and a large decrease in forest cover. Most of the changes in both LULC types occurred during 2003–2008. Overall, agricultural land, shrubland, water features, built-up areas and barren land increased by 287,600 hectares, 58,600 hectares, 8300 hectares, 4600 hectares and 1300 hectares, respectively, while forest cover and grassland decreased by 284,500 hectares and 76,000 hectares respectively. The rate of LULC changes in the upland areas were higher than those in the lowland areas of the province. The main drivers of LULC change identified over the period of study were policy, legal framework and projects to improve economy, population growth, infrastructure development, economic growth, rising land prices, and climate and environmental change. Landmine clearance projects and land concessions resulted in a transition from forest cover and shrubland to agricultural land. Population and economic growth not only resulted in an increase of built-up area, but also led to increasing demand for agricultural land and rising land prices, which triggered the changes of other LULC types. This research provides a long-term and detailed analysis of LULC change together with its drivers, which is useful for decision-makers to make and implement better policies for sustainable land management.

SUSTAINABLE MANAGEMENT POLICY STRATEGY OF COASTAL TOURISM IN PANGANDARAN DISTRICT, INDONESIA

One of the crucial coastal tourism is a region of Pangandaran District coastal tourism. The area represented a coastal region that has various exploiting characteristics and interconnected one another. The primary purpose of this research is to analyze the sustainable management policy strategy of coastal tourism. To reach the especial target, hence there are some activities which require to be conducted as a particular target that is (1) identifying determinant in the future, (2) determining strategic target and importance of the main stakeholder ; and (3) defining and describe of evolution possibility of future. The prospective analysis was conducted to yield a sustainable regional development scenario of coastal tourism in Pangandaran District, with determining key factors that affect system performance. From various possibilities that could happen, is formulated three regional development scenario of Pangandaran District coastal tourism to come, that are : 1) Conservative - Pessimistic by conducting to repair of main key factor only, 2) Moderate - Optimistic by conducting repair about 50 % of the primary key attribute (factor), 3) Progressive - Optimistic by conducting repair to entire key attribute (factor). To increase sustainable status forwards (long-period), a scenario that must be conducted to increase the regional sustainable development status of the coastal of Pangandaran District is Progressive – Optimistic by conducting repair by totally to all sensitive attribute so that all dimension become sustainable for coastal region development.

Can Nationally Prescribed Institutional Arrangements Enable Community-Based Conservation? An Analysis of Conservancies and Community Forests in the Zambezi Region of Namibia

Community-based conservation is advocated as an idea that long-term conservation success requires engaging with, providing benefits for, and establishing institutions representing local communities. However, community-based conservation’s efficacy and impact in sustainable resource management varies depending on national natural resource policies and implications for local institutional arrangements. This paper analyses the significance of natural resource management policies and institutional design on the management of common pool resources (CPRs), by comparing Namibian conservancies and community forests. To meet this aim, we reviewed key national policies pertinent to natural resource governance and conducted 28 semi-structured interviews between 2012 and 2013. Key informants included conservancy and community forest staff and committee members, village headmen, NGO coordinators, regional foresters, wildlife officials (wardens), and senior government officials in the Ministry of Environment and Tourism and the Ministry of Agriculture, Water and Forestry. We explored the following questions: how do national natural resource management policies affect the operations of local common pool resource institutions? and how do external factors affect local institutions and community participation in CPRs decision-making? Our results show that a diversity of national policies significantly influenced local institutional arrangements. Formation of conservancies and community forests by communities is not only directly linked with state policies designed to increase wildlife numbers and promote forest growth or improve condition, but also formulated primarily for benefits from and control over natural resources. The often-assumed direct relationship between national policies and local institutional arrangements does not always hold in practice, resulting in institutional mismatch. We aim to advance theoretical and applied discourse on common pool resource governance in social-ecological systems, with implications for sustainable land management policies in Namibia and other landscapes across sub-Saharan Africa.

Waste management in urban environments: Insights of the citizens’ views in a densely populated municipality in Greece

&lt;p&gt;Urbanization, industrialization and economic growth have considerable challenged the orientation of waste management policies and practices. Intrinsically, major concerns appear in urban environments, as they receive increased volumes of waste, which in turn pose threats for the environment and public health. Prioritization of waste prevention is proven to be the optimal solution in preserving resources and coincide with international sublime strategies for sustainable waste management. However, the citizens’ awareness and active involvement, in decision making for sustainable waste management policies practices, are preconditions for their implementation. The study examined the citizens’ views on the local waste management policies and strategies in the urban environment of Neapolis-Sykies Greece. The application of factor analysis, hierarchical log-linear analysis and hierarchical cluster analysis provided important correlations regarding the citizens’ demographic characteristics, littering behavior, sources of information on waste management issues, perceptions about quality of life and provided cleanliness services. In particular, collection points and collection system are positively assessed, while the value of recycling is widely acknowledged. Albeit, the citizens are not properly informed about local policies and practices related to existing waste management issues in their municipality. Unfortunately, this is deemed to be a barrier in promoting public participation in decision making processes.&lt;/p&gt;&#x0D;

Econometrics of the environmental Kuznets curve in the face of climate change and sustainability in Zambia

The main aim of this paper was to test and examine the existence of the Environmental Kuznets Curve (EKC) hypothesis using time-series data (1990–2020). Deforestation was used as a dependent variable signifying environmental degradation. Energy consumption, economic growth, population growth, and trade openness were used as independent variables. The objectives were threefold: to understand the nexus between the independent variables and deforestation; inform policy responses on forestry management and energy development while contributing to the environmental sustainability literature. Designed with several significant tests, the analytical toolkit was drawn from two methodological embodiments - the Autoregressive Distributed Lag bounds test to cointegration, and the Vector Error Correlation Model–Granger causality test. Results suggest cointegration among the variables, both in the short, and long-run time horizons. In the short run, findings reveal ceteris-paribus effects. A unit rise in energy consumption increases the deforestation rate on average ceteris-paribus of 1.5 units. Similarly, a 1% rise in economic growth resulted in 3.5% rise on average ceteris-paribus in the deforestation variable while trade openness resulted in a 5% rise in deforestation. In the long run, a unit rise in energy consumption increased the deforestation rate by 2.2 units, while a 1% rise in economic growth increased the deforestation rate by 2.2%. A 1% rise in population and trade was associated with a 12% and 19% increase in the deforestation variable respectively. We conclude that the EKC hypothesis does not exist in Zambia currently. However, to the policy makers and environmental professionals, these findings suggest a more comprehensive and robust response in energy development and sustainable forest management policies.

Application of a combinatorial approach for soil organic carbon mapping in hills

Accurate mapping of soil organic carbon (SOC) is critical to improve C management and develop sustainable management policies. However, it is constrained by local variations of the model parameters under complex topography, especially in hills. This study applied a methodological framework to optimize the spatial prediction of SOC in the hilly areas during 1981–2012 by quantifying the relative importance of environmental factors, which include both qualitative factors and quantitative variables. Results showed that SOC increased twofold with a moderate spatial dependence during the past 32 years. During this period, land use patterns, soil groups, topographic factors, and vegetation coverage had significant impacts on the SOC changes (p < 0.01). Specifically, the impact of land use patterns has exceeded the impact of soil groups and became the dominant factor affecting SOC changes. Meanwhile, impacts from the topographic factors and vegetation coverage have substantially declined. Based on those results, a combinatorial approach (LS_RBF_HASM) was developed to map SOC using radial basis function neural network (RBF) and high accuracy surface modelling (HASM), and to generate more detailed spatial mapping relationships between SOC and the affecting factors. Compared with ordinary kriging (OK), land use-soil group units (LS) and HASM combined (LS_HASM), multiple linear regression (MLR) and HASM combined with LS (LS_MLR_HASM); LS_RBF_HASM showed a better performance with a decline of 6.3%–37.7% prediction errors and more accurate spatial patterns due to the quantitative combination of auxiliary environmental variables and more information on the SOC variations within local factors captured by RBF and HASM. Additionally, MLR may partially undermine the relationship of the internal spatial structure due to the highly nonlinear relation between SOC and environmental variables. This methodological framework highlights the optimization of more environmental factors and the calculation of spatial variability within local factors and provides a more accurate approach for SOC mapping in hills.