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Urban Sustainable Development of Water Resources Constraint


Abstract: Natural resources and environmental sustainability is the basis for sustainable urban development. Accelerated development of urbanization process,[link widoczny dla zalogowanych], the resources to provide the driving force of economic development, but also natural to determine the boundaries of sustainable development of urban economy. With the rising level of urbanization, most cities in China sharply increased demand for water resources, supply and demand become increasingly acute. As an indispensable resource for urban development of water resources has become a constraint for sustainable urban development is one important factor. Keywords: urban sustainable development; water resource constraints; system innovation 1 Introduction Party National Congress to \environment will be improved significantly improve the efficiency of resource use, and promote harmony between man and nature to push the whole society to embark on the development of production and living well off the path of development \the resources and the environment is the core issue of sustainable development, the essence of the problem reflected in the social and economic activities than the carrying capacity of natural ecosystems. The problem of resource constraints, to find out the environment,[link widoczny dla zalogowanych], energy constraints and effective way to achieve economic and social sustainable development, has become the \ City is the core of the regional system is the key to achieving sustainable development. In the development of China's accelerated urbanization process, the resources to provide the driving force of economic development, but also natural to determine the boundaries of sustainable development of urban economy. Natural resources and environmental sustainability is the basis for sustainable urban development. With the rising level of urbanization, most cities in China sharply increased demand for water resources, supply and demand become increasingly acute. As an indispensable resource for urban development of water resources has become a constraint for sustainable urban development is one important factor. 2 resources for sustainable economic development within the constraints 2.1 energy consumption and supply constraints from the physical point of view,[link widoczny dla zalogowanych], things are generated by the energy, sustainable development is fundamentally related to the generation of energy and by a variety of specific sustainable utilization of material resources. In the process of economic development, there is the internal energy consumption, increase in entropy and ecosystem carrying capacity of three systemic, sustainable development is actually resulting. By the first law of thermodynamics we know that the number of natural energy transfer and transformation processes remain unchanged, that of conservation of energy. However, the fact of a law of energy conservation is more important that a system can increase △ U, equal to the system absorbs heat from the outside of the system Q and the outside world for the work done W. Namely: △ U = Q + W a system to do work, or internal energy consumption, or absorb the energy outside the system. Social and economic development is essentially a kind of energy use, consumption and transformation behavior. If the city as a system, which must consume a variety of renewable and nonrenewable resources for production and urban population living within the service. As the city overrun unreasonable use or use of resources, making the city the consumption of resources, to meet the needs of contemporary urban development, but also for future long-term stability and sustainable development set constraints, and increasingly this constraint more apparent. In the world today live in economically developed countries because of its \energy, shows that its lessons of external resources to increase the \Since the industrial revolution, Western-style rapid economic development is to continue to absorb a large extent behind the country's resources for their economic conditions. While the developing countries, because of its economic and technological backwardness, the performance of international trade of primary products for the resource-based output, the economic development of the internal energy consumption and added largely confined to the domestic settlement. This is why a lot of energy consumption in developing countries will face serious capacity constraints of resources, developed countries would not, or symptoms of the reason is much lighter. This is also encountered in the economic development of developing countries, the first constraint, that the internal energy consumption and supply constraints. 2.2 entropy increase and the negative external constraint found by the second law of thermodynamics, entropy is also a feature that amount within the system. Within a system, with the constant use of energy and can not do work of useless energy is increasing constantly tired, increasing the total entropy, which formed the law of entropy increase. System to get rid of dead organisms, the only way is to the environment,[link widoczny dla zalogowanych], continuing to draw negative entropy, entropy mechanism to balance and maintain the system balance. In a city system, economic growth depends on the support of a large number of energy consumption and economic growth of the large amount of energy consumed in the process will lead to the accumulation of entropy, including the concrete form of the entropy associated with wastewater, waste gas, waste increased significantly. Entropy increase will greatly expand the negative externalities of economic development, causing loss of balance of ecosystem functions and life support systems weaken, resulting in ecological sustainability. The ecological sustainability and economic sustainability and social sustainability is the foundation, making the process of economic development to maintain the ecosystem balance of a basic condition for achieving sustainable development. In the entropy balance mechanism, developed countries use their own technology advantages and economic status of the upstream, through the economy, a large number of developing countries with low potential draw negative entropy (Resource and profits), and a large number of transfers of high pollution, high energy consumption industry and the proliferation of negative externalities entropy output behavior, the developed countries maintain domestic economic system and the balanced development of the ecosystem. Developing countries is completely different, because of the economic potential of low, external to the system, especially to developed countries draw economic negative entropy and transfer capacity of the negative externalities is much weaker. It is this development differences between the constraints, resulting in some developed countries is almost in the wanton squandering of energy, and low potential of developing economies, the more negative entropy from its own internal lessons to promote its economic development and the entropy by the increase in economic development and other negative externalities accumulated in the country. This constitutes the process of economic development in developing countries is another important constraint, that is, entropy increase and the negative external constraints. To be able to control the consumption of economic resources to withstand the limits, the entropy increases the bearing capacity of the biosphere within the control of both the two major constraints in this detailed explanation, but also developing long-term conditions to achieve sustainable development. This conclusion, the issue of sustainability is essentially a \core of the system of urban areas, especially in cities of developing countries to achieve sustainable socio-economic development of the internal energy added by the dual constraints and entropy increase, at a disadvantage sustainable environment, and therefore more important to the sustainable development strategy.
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