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Climate Change Impact And Adaptive Water Management For Major River Basins In China

World Water Congress 2015 Edinburgh Scotland
17. Climate change, impacts and adaptation
Author(s): Jun Xia (Wuhan
Peoples Republic)
Past President, IWRA
Chair Professor & Dean, The Research Institute for Water Security (RIWS), Wuhan University
Distinguished Professor, Key Lab. of Water Cycle & Related Land Surface Processes,
Chinese Academy of Sciences (CAS)

Keyword(s): Sub-theme 17: Climate change, impacts and adaptation,


China, as a larger developing country in the world, in facing to bigger challenges than before on wisely managing water resources to support rapidly socio-economic development in 2020 and beyond. China has a vast area of 9.6 million km2 and relatively abundant water resources with ranked sixth in the world after Brazil, the Russian Federation, Canada, the United States and Indonesia in terms of absolute amount of annual runoff. However, given its large population of over 1.3 billion, China has a very low per capita amount (about one quarter of the world average) of water resources and, is therefore one of the countries with the most severe shortage of water in the world, particular North China. North China is one of very important regions in China. For this region, population has 0.437 billion in 2000 that occupies 35% of total in China, GDP reaches 386 billion US$ that is also 32% of total in China. Irrigation area of North China is 42% of total in China, and agricultural product has 40% of total in China. However, it is the most water shortage area in China. For instance, water resources per capita in Hai River Basin have only 270 m3, which is only 1/7 of the national average and 1/24 of the world average. Water Resource Vulnerability under impact of both climate change and human activities are rather significantly. This presentation will focus on two issues: (1) how to screening climate changes impact to water sector, and how to quantify water resource vulnerability related to impact of climate change and human activity ? (2) how to take adaptation & wisely manage water to changing environment on existing water projects and new water programme & water policy in China? A screening process for climate impact to water sector in North China was proposed. A new study on quantifying water resource vulnerability, based on three practical and workable, i.e., the use to availability ratio, water crowding and per capita water use, were developed. Four case studies in China are given as explanation of this study. The concept on good water governance was discussed. It was shown that: (1) climate change and human activity are two big issues to water sustainable use. Science & technology will play a key role on understanding & reduce risk; (2) Water policy, in China will had to shift from water quantity management into water quality management, and water supply management into water demand management. Improving Water Governance will be a priority on climate change adaptation. 1. Brekke L D, Kiang J E, Olsen J R, et al. (2009) Climate Change and Water Resources Management--A Federal Perspective. U.S. Geological Survey Circular 1331. 13--15 2. Burn D H, Burn M A, Hag E. (2002). Detection of hydrologic trends and variability.J Hydrol, 255: 107--122 3.IPCC. (2012). Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation. A Special Report of Working Groups I and II of the Intergovernmental Panel on Climate Change. Cambridge: Cambridge University Press. 582 4.Xia Jun, Bing Qiu & Yuanyuan Li. (2012) Water resources vulnerability and adaptive management in the Huang, Huai and Hai river basins of China, Water International, 37(5), 509-511 5. Xia J, Liu C M, Ding Y J, et al.(2011). Water issues (vol.1): Vision in China (in Chinese). Beijing: Science Press. 311 6. Vörösmarty, C.J., et al., 2000. Global water resources: vulnerability from climate change and population growth. Science, 289, 284--288.

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