| RESPONSE OF SEDIMENT DISCHARGE TO ECOHYDROLOGICAL FACTORS IN LUERGOU CATCHMENT BASED ON WAVELET ANALYSIS |
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| 作者姓名： | Yuan TIAN Xinxiao YU Derong SU Xin YANG |
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| 作者单位： | [1]College of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing, 100037 [2]The Key laboratory of Soil ＆ Water Conservation of Ministry of Education, Beijing Forestry University, Beijing, 100083 [3]The Key laboratory of Silviculture ＆ Conservation of Ministry of Education, Beijing Forestry University, Beijing, 100083 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | The response of sediment discharge rate to the following four ecohydrological factors: temperature, rainfall, evapotranspiration (ET), and stream flow was evaluated by conducting wavelet analysis on Luergou small catchment data ranging from 1982 to 2000. For sediment discharge rate, there was an overall trend of reduction that included a periodic oscillation of 6 to 7 years per cycle. Rainfall also had an overall trend of reduction that included two periodic oscillations of 7 years per cycle and 2 years per cycle, respectively. Stream flow had the same trend as rainfall but had one periodic oscillation of 6 to 7 years per cycle. In contrast with rainfall and stream flow, the trends for temperature and ET each showed an overall increasing tendency, and both had the same two periodic oscillations of 6 to 7 years per cycle and 4 years per cycle, respectively. The sediment discharge rate had significant relationships with the four ecohydrological factors, with stream flow and rainfall having positive correlations, while ET and temperature had negative correlations. The correlation between ET and sediment discharge rate became stronger when ET was compared to the sediment discharge rate of the following year. The relationship between sediment discharge rate and the four ecohydrological factors was further expressed by the multi-linear regression model that was constructed, which makes sediment discharge rate a function of stream flow, rainfall, ET, and temperature.
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| 关 键 词： | 输沙量 降雨 河流 生态水力因子 小波分析 |
| 收稿时间： | 2005-04 |
| 修稿时间： | 2006-09 |
RESPONSE OF SEDIMENT DISCHARGE TO ECOHYDROLOGICAL FACTORS IN LUERGOU CATCHMENT BASED ON WAVELET ANALYSIS |
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| Yuan TIAN Xinxiao YU Derong SU Xin YANG.RESPONSE OF SEDIMENT DISCHARGE TO ECOHYDROLOGICAL FACTORS IN LUERGOU CATCHMENT BASED ON WAVELET ANALYSIS[J].International Journal of Sediment Research,2007,22(1):70-77. |
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| Authors: | Yuan TIAN Xinxiao YU Derong SU Xin YANG |
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| Abstract: | The response of sediment discharge rate to the following four ecohydrological factors: temperature, rainfall, evapotranspiration (ET), and stream flow was evaluated by conducting wavelet analysis on Luergou small catchment data ranging from 1982 to 2000. For sediment discharge rate, there was an overall trend of reduction that included a periodic oscillation of 6 to 7 years per cycle. Rainfall also had an overall trend of reduction that included two periodic oscillations of 7 years per cycle and 2 years per cycle, respectively. Stream flow had the same trend as rainfall but had one periodic oscillation of 6 to 7 years per cycle. In contrast with rainfall and stream flow, the trends for temperature and ET each showed an overall increasing tendency, and both had the same two periodic oscillations of 6 to 7 years per cycle and 4 years per cycle, respectively. The sediment discharge rate had significant relationships with the four ecohydrological factors, with stream flow and rainfall having positive correlations, while ET and temperature had negative correlations. The correlation between ET and sediment discharge rate became stronger when ET was compared to the sediment discharge rate of the following year. The relationship between sediment discharge rate and the four ecohydrological factors was further expressed by the multi-linear regression model that was constructed, which makes sediment discharge rate a function of stream flow, rainfall, ET, and temperature. |
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| Keywords: | Sediment discharge rate Rainfall Stream flow Wavelet analysis Luergo small catchment |
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