| 水文与水资源 |
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| Climate Evolution and Its Impact on Water Resource Change in Main Runoff Generating Area of Upper Yellow River: A case study on Gannan Plateau |
YAO Yu-bi1,2,3, WANG Rong-yuan1,2, DENG Zhen-yong1, YIN Dong4, ZHANG Xiuyun3, CHEN Chang-ping5 |
| 1.Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province and China Meteorological Administration, Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China; 2.Laboratory of Climate Studies, China Meteorological Administration, Beijing100081, China; 3.Meteorological Bureau of Dingxi, Dingxi 743000, Gansu, China; 4.Lanzhou Center of Meteorological Observation, Lanzhou 730020, China; 5.Meteorological Bureau of Gannan Prefecture of Gansu Province, Hezuo 747000, Gnasu, China |
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Abstract Based on the surface meteorology and water resources observation data in the main runoff generating area of the upper Yellow River, the characters of climate evolution and water resources change and their relationship are analyzed; in addition the water resources climate model is also established. The results show that the inter-annual change of precipitation displayed descending trend, the tendency rate was -2.26~-0.96 mm·a-1, this reduction mainly happened in autumn and its sharp point was at 1980—1990. It is proved that the 6~7 a short period and 15 a long period are significant. The results also show that the inter-annual change of temperature displayed marked ascending trend, the rising rate of temperature is higher than that of whole nation and its sharp point was at 1970s, the aridity index of lawn also displayed prominent ascending trend, in recent 50 years the climate of Gannan Plateau showed warming and drying trend, It is also found that the water resources displayed remarkable descending trend, it existed 2~3 a, 7~8 a, 20~23 a periods, water resource showed marked positive correlation with precipitation, while it showed marked negative correlation with aridity index, the water source will decrease if precipitation increase and dry index of grassland ascend.
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Received: 16 March 2006
Published: 20 September 2007
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Cite this article:
YAO Yu-bi;;WANG Rong-yuan;DENG Zhen-yong;YIN Dong;ZHANG Xiuyun;CHEN Chang-ping. Climate Evolution and Its Impact on Water Resource Change in Main Runoff Generating Area of Upper Yellow River: A case study on Gannan Plateau. JOURNAL OF DESERT RESEARCH, 2007, 27(5): 903-909.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2007/V27/I5/903
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2007, Vol. 27 
