| Multiple Time-scale Characteristics of Runoff Variations in Middle Reaches of Huolin River and Their Effects |
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| 作者姓名： | LU Xiaoning DENG Wei ZHANG Shuqing |
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| 作者单位： | 1. Northeast Institute of Geography and Agroecology，Chinese Academy of Sciences，Changchun 130012，China; 2. Institute of Mountain Hazards and Environment，Chinese Academy of Sciences，Chengdu 610041，China; 3. Graduate University of Chinese Academy of Sciences，Beijing 100049，China; 4. Chengdu University of Information Technology，Chengdu 620225，China |
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| 基金项目： | 中国科学院知识创新工程项目 |
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| 摘 要： | The Huolin River is one of the most important water sources for Xianghai wetland, Horqin wetland, and Chaganhu wetland in the western Songnen Plain of Northeast China. The annual runoff series of 46 years at Baiyun- hushuo Hydrologic Station, which is located in the middle reaches of the Huolin River, were analyzed by using wavelet analysis. Main objective was to discuss the periodic characteristics of the runoff, and examine the temporal patterns of the Huolin River recharging to the floodplain wetlands in the lower reaches of the river, and the corresponding effects of recharging variation on the environmental evolution of the wetlands. The results show that the annual runoff varied mainly at three time scales. The intensities of periodical signals at different time scales were strongly characterized by local distribution in its time frequency domain. The interdecadal variation at a scale of more than 30yr played a leading role in the temporal pattern of runoff variation, and at this scale, the runoff at Baiyunhushuo Hydrologic Station varied in turn of flood, draught and flood. Accordingly, the landscape of the floodplain wetlands presented periodic features, es- pecially prominent before the 1990s. Compared with intense human activities, the runoff periodic pattern at middle (10-20yr) and small (1-10yr) scales, which has relatively low energy, exerted unobvious effects on the environmental evolution of the floodplain wetlands, especially after the 1990s.
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| 关 键 词： | 河漫滩湿地 河流 子波分析 霍林河 |
| 收稿时间： | 15 June 2006 |
| 修稿时间： | 2006-06-152007-01-25 |
Multiple time-scale characteristics of runoff variations in middle reaches of Huolin River and their effects |
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| LU Xiaoning DENG Wei ZHANG Shuqing.Multiple Time-scale Characteristics of Runoff Variations in Middle Reaches of Huolin River and Their Effects[J].Chinese Geographical Science,2007,17(2):143-150. |
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| Authors: | Lu Xiaoning Deng Wei Zhang Shuqing |
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| Institution: | (1) Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130012, China;(2) Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, China;(3) Graduate University of Chinese Academy of Sciences, Beijing, 100049, China;(4) Chengdu University of Information Technology, Chengdu, 620225, China |
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| Abstract: | The Huolin River is one of the most important water sources for Xianghai wetland, Horqin wetland, and Chaganhu wetland in
the western Songnen Plain of Northeast China. The annual runoff series of 46 years at Baiyun-hushuo Hydrologic Station, which
is located in the middle reaches of the Huolin River, were analyzed by using wavelet analysis. Main objective was to discuss
the periodic characteristics of the runoff, and examine the temporal patterns of the Huolin River recharging to the floodplain
wetlands in the lower reaches of the river, and the corresponding effects of recharging variation on the environmental evolution
of the wetlands. The results show that the annual runoff varied mainly at three time scales. The intensities of periodical
signals at different time scales were strongly characterized by local distribution in its time frequency domain. The interdecadal
variation at a scale of more than 30yr played a leading role in the temporal pattern of runoff variation, and at this scale,
the runoff at Baiyunhushuo Hydrologic Station varied in turn of flood, draught and flood. Accordingly, the landscape of the
floodplain wetlands presented periodic features, especially prominent before the 1990s. Compared with intense human activities,
the runoff periodic pattern at middle (10–20yr) and small (1–10yr) scales, which has relatively low energy, exerted unobvious
effects on the environmental evolution of the floodplain wetlands, especially after the 1990s.
Foundation item: Under the auspices of Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX3-SW-332-01) |
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| Keywords: | floodplain wetland runoff multiple time-scale wavelet analysis Huolin River |
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