Freshwater resources are under increasing pressure from human and environmental constraints. Population growth and socio-economic development have intensified water withdrawals globally, in particular for irrigated agriculture, accounting for 70-80% of global water use. Furthermore, climate change is expected to strengthen water scarcity in some regions. Trade of water-intensive products, corresponding to a transfer of water resources, can reduce the spatial heterogeneity of water availability. As such, domestic or international trade may improve water-use efficiency at a global or national scale, by providing more efficiently produced goods to all consumers. This thesis quantifies, analyzes and models these virtual transfers of water, between the world's nations and among provinces of China. The impacts of future climate, socio-economic and policy changes on these systems are also estimated.
Chapter 1 describes the evolution of international food trade and associated water resources transfers, and provides an assessment of key impacts of policy, economic and biophysical factors on this global system. Chapter 2 develops a fitness model that determines which variables control the global virtual water trade network's structure and temporal evolution, and estimates changes in the network under future scenarios. Chapter 3 presents the construction and analysis of China's inter-provincial and foreign virtual water trade. The connectivity and flow structure of this network, as well as the efficiency of the system in terms of water resources, are quantified and analyzed. In addition, we identify provinces and commodities that could be targeted for improved efficiency. In Chapter 4, specific agricultural policy scenarios in China are considered, and their impacts on domestic and foreign virtual water trade are analyzed.
|Commitee:||Rinaldo, Andrea, Wood, Eric|
|Department:||Civil and Environmental Engineering|
|School Location:||United States -- New Jersey|
|Source:||DAI-B 75/10(E), Dissertation Abstracts International|
|Subjects:||Hydrologic sciences, Environmental Studies, Agricultural economics|
|Keywords:||Agricultural policy, Food trade, New jersey, Virtual water, Water resources|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be