Search

Advancing urban sustainability requires an implementation of various measures such as environmental policy, behavioral change, and technological developments, which have to be taken at various spatial scales. However, choosing the right measures demands considering their potential contribution in reducing the environmental impact and advancing urban sustainability. In recent years, some attempts to assess the contribution of implementing various measures have been advanced by various researchers focusing on different components of urban environmental interactions. While these studies make a significant contribution towards the understanding of the impact of various measures taken for a specific environmental issue, they mostly ignore the diversity and complexity of the urban interface with the environment at different spatial scales, as well as the ecological economics perspective, which approaches the city as a system. This paper uses the UBSI index published recently in this journal, to evaluate the urban biophysical sustainability of the city of Tel Aviv-Jaffa (Israel) in 2014. Based on this data, future scenarios are developed, which examine the potential contribution of various policy measures and different technological processes to the city's sustainability. This examination is conducted while considering population growth and changes of consumption patterns as they are expected to occur until 2030. [ABSTRACT FROM AUTHOR]

China's crop production sector faces severe water scarcity issues. Previous research has shown that effective water conservation policies exert strongly negative impacts on agricultural production and farmers' income, which make them politically unfeasible under Chinese conditions. To highlight ways out of this dilemma, the present study tests three alternative water policies complemented by supportive agricultural policies to reduce the trade-offs between water conservation and rural development policy goals. Using the case of the extremely arid Aksu-Tarim Region in northwest China, a regional supply model is developed which serves as the analysis framework. Applied as stand-alone water policies, irrigated area tax, water quota and water pricing differ clearly in effectiveness and efficiency. Combined with agricultural policies (subsidies) into multiple policy instruments, the price-based and quota-based instruments mitigate the negative impacts on rural development goals. Targeting a water conservation rate of 20%, the tested multiple policies perform alike on the level of the entire study region; cotton production decreases by 15%, cereals production remains stable, and regional income decreases by 13%. However, at the sub-regional level, the impacts on water conservation, production and income differ significantly between the alternative policy instruments and sub-regions, constituting a crucial challenge for practical water policy implementation. [ABSTRACT FROM AUTHOR]

Integrating spatial analysis with the supply and demand of biocapacity is critical for the sustainable development of regional eco-economic systems. Previous studies have focused on the temporal analysis of biocapacity at broad geographical scales, but lacked the systematic spatial realization at fine scales. An improvement is proposed of this conventional methodology of the ecological footprint by incorporating land-use data derived from high-resolution remote-sensing images into the calculation of biocapacity supply at regional, provincial and county levels in Northwestern China in 2000. The spatial heterogeneity and its effect on the biocapacity supply were systematically revealed for this region. First, the biocapacity supply declined from the east (the Guanzhong Basin and the Loess Plateau) to the middle (the Qaidam Basin and the Turpan Basin), and turned to rise from the middle to the west (the northwest of the Xinjiang Uygur Autonomy). Second, although the gap between biocapacity supply and demand resulted in a small ecological deficit at the regional level, a large ecological deficit was observed at the provincial and county levels, highlighting an unsustainable situation for some of the sub-regions. Importantly, a power law relationship was unveiled between the biocapacity supply and population density, suggesting that (i) the biocapacity supply as a critical indicator could reflect the intensity of human exploitation on local biophysical resources and (ii) humans tend to have a preference to inhabit those areas with high biological productivity. These results provide opportunities to enhance policy development by central and local governments as part of the long-term Great Western Development Strategy of China. [Copyright &y& Elsevier]