| Autor: |
JIANG Shi-zhong, LIANG Chuan |
| Předmět: |
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| Zdroj: |
Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban; 2009, Vol. 41 Issue 11, p197-200, 4p, 2 Charts, 5 Graphs |
| Abstrakt: |
Based on hydrologic data of long time series about Xiaohuangguayuan hydrometric station of Longchuan River, the multi-time-scale and jump characteristics of precipitation and sediment discharge time series of Longchuan River were studied utilizing wavelet transform. Results show that the annual precipitation of Xiaohuangguayuan station has quasi-prime periods of 2 a and 4 a; the annual sediment discharge has quasi-prime periods of 2 a, 4 a, and 9.5 a. The sediment discharge of Longchuan River distributes unevenly within a year, the amount from July to October accounts for 96.7%, particularly in June and August it takes almost 55.7%. The cause of the changes within a year and high-frequency tremble is due to the changing time of precipitation. The river sediment stems from midstream and downstream of Longchuan River (the percentage is 94.2% of the total watershed), and the total load sediment of Xiaohuangguayuan station offers 1.69% of that of Pingshan station. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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