| Impact of climate change on natural runoff in Tuweihe basin |
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| DOI：10.7606/j.issn.1000-7601.2011.06.34 |
| Key Words: temperature precipitation runoff Tuweihe |
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| Abstract: |
| Based on the observation data from 1970~2005 of temperature，precipitation and runoff of Tuweihe
basin，we analyzed the inter annual and seasonal characteristics and trends of precipitation and runoff variation in the wa-tershed of Tuweihe. The Pearson correlation method was used to analyze the correlation of temperature and precipitation. The results showed that: As the global warming, there was a significant increasing trend in the annual mean temperature, which primarily took place in winter; The anmual precipitation experienced a weakly decreasing trend and the decline in summer and autumn was more obvious; The annual runoff of Tuweihe basin indicated a siqnificant and continuous de-scend during the past 36 years and the descend mainly happened in summer and autumn; There was a significantly nega-tive correlation between annual runoff and temperature while there was a weakly positive correlation between annual runoff and precipitation of the basin. The correlation between temperature，precipitation and runoff varied with different sections of Tuweihe and different seasons. |