scholarly journals Matriz de Intercambios de Agua. Análisis mediante la Teoría de Grafos

2011 ◽  
Vol 3 (1) ◽  
pp. 31 ◽  
Author(s):  
Esther Velázquez Alonso
Keyword(s):  
Water Consumption ◽  
Water Conservation ◽  
Positive Contribution ◽  
Input Output ◽  
Negative Effects ◽  
Output Analysis ◽  
Input Output Analysis ◽  
Water Limitations ◽  
The Stability

The aim of this work is to demonstrate the relationships established between an economy’s productive sectors and the water consumption generated during their productive processes. We study de Andalusian reality, region of the South Spain characterized by its scarcity, and we will examine if the excessive dependence on water resources which may occur in some productive sectors might affect not only the conservation and quality of this resource, but also have negative effects upon the stability of the economy itself. A mixed methodology has been used, combining Input-Output analysis with Graphs Theory. We obtain a water Input-Output model and an interrelationship matrix which is analysed by Graphs Theory. The main conclusion is that Andalusian’s economic specialisation does not make a positive contribution water conservation and, moreover, the regional economy’s sustainability might be seriously endangered if the authorities do not take into account water limitations in their economy policy.

scholarly journals Virtual water embodied in the export from various provinces of China using multi-regional input–output analysis

Water Policy ◽  
2016 ◽  
Vol 19 (2) ◽  
pp. 197-215 ◽  
Author(s):  
Yue Huang ◽  
Yalin Lei ◽  
Sanmang Wu
Keyword(s):  
Water Consumption ◽  
Control Policy ◽  
Virtual Water ◽  
Export Control ◽  
Input Output ◽  
Output Analysis ◽  
Input Output Analysis ◽  
Non Local ◽  
Local Water ◽  
Regional Water

China is a large exporter and consumer of water embodied in export products. In addition, there is much trade among regions within China, and exports from various provinces consume not only local water but national non-local water. However, former calculations of the water consumption embodied in the exports of various provinces do not reflect the sources of the water consumption. Previous studies on virtual water in China's exports have focused on national aggregate analyses and have paid little attention to the inter-regional water consumption transfer driven by exports. We used a multi-regional input–output model of thirty provinces to examine the virtual water export. The results show that the total virtual water in China's exports was 106.3 billion m3, and 77.0% of the embodiment was from exports from the eastern provinces, where over 90% of China's exports occur. However, the virtual water driven by per unit of export in the eastern regions is far less than that in the central and western regions. Moreover, the central and western provinces, whose exports are small, indirectly export much virtual water by supporting eastern China's exports via inter-regional economic linkages. The results yield important implications for China's export and virtual water export control policy.

Planning with Semi-input-output Method with Empirical Application to Nigeria. By Arie Kuyvenhoven. Leiden: Martinus Nijhoff Social Sciences Division. 1978. xi + 266 pp.

1980 ◽  
Vol 19 (3) ◽  
pp. 247-249
Author(s):  
A. R. Kemal
Keyword(s):  
Social Sciences ◽  
Developing Countries ◽  
Final Demand ◽  
The Other ◽  
Production Structure ◽  
Input Output ◽  
Output Analysis ◽  
Input Output Analysis ◽  
Comparative Cost ◽  
Planning Models

Input -output analysis is being widely used in developing countries for planning purposes. For a given level of final demand, input-output analysis allows us to project the required level of gross output to ensure consistency of plan. These projections are made on the assumption that the existing production structure is optimal and it implies that an increase in demand will be met through the expansion of domestic output even when it can be satisfied through an increase in imports. On the other hand, according to the semi-input-output method, we do not have to increase the output of international sectors in order to meet the increase in demand because the level and composition of these activities should be determined by comparative- cost considerations. These are the only national sectors in which output must increase in order to avoid shortage. The semi-input -output method has been such a useful and important contribution, yet, regrettably, its influence on the planning models had been rather limited.

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