| Climate Evolution and Its Impact to Water Resource Changer in Source of Weihe River Basin |
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| DOI：10.7606/j.issn.1000-7601.2011.05.44 |
| Key Words: Climatic changing Water resource aridity index Weihe source |
| Author Name | Affiliation | | YAO Yubi | 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
Meteorological Bureau of Dingxi of Gansu Province, Dingxi 743000, China | | ZHANG Xiuyun | Meteorological Bureau of Dingxi of Gansu Province, Dingxi 743000, China | | DUAN ZHiyong | Hydrological And Water Resource Reconnaissance Bureau of Dingxi of Gansu Province, Dingxi 743000, China | | SONG Yongjie | Meteorological Bureau of Baiying of Gansu Province, Baiying 730900, China | | YANG Jianjun | Meteorological Bureau of Dingxi of Gansu Province, Dingxi 743000, China | | WANG Dianjun | Meteorological Bureau of Dingxi of Gansu Province, Dingxi 743000, China |
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| Abstract: |
| Based on the surface meteorology and water resource observation data in source of Weihe river, the characters of climate evolution and water resource change, and their relationship are analyzed, in addition the water resources climate model is also established. The result show that the inter-annual change of precipitation display descending trend, the tendency rate is -10.442～-10.417 mm/10a, this reduction mainly happened in autumn and summer. The results also show that the inter annual change of temperature display marked ascending trend, the tendency rate is 0.169～0.201℃/10a, this accessional ap
peared most in winter, this ascending trend appeared from 1970s and it's sharp point was at 1970's, the aridity index also display prominent ascending trend, the tendency rate is 0.058～0.113/10a, in recent 50 years the climate of the Weihe source show warming and drying trend, It is also found that the water resources display remarkable descending trend, the tendency rate is -0.044×108 m3/10a, it exist 2～3 a、5 a period, water resource show marked positive correlation with precipitation, while it show marked negative correlation with temperature and aridity index, the water source will decrease if precipitation decrease and temperature ascend and dry index ascend. |
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