| 喀斯特流域径流量时序演变特征分析——以贵州省为例 |
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| 引用本文： | 孔兰,梁虹,黄法苏.喀斯特流域径流量时序演变特征分析——以贵州省为例[J].中国岩溶,2007,26(4):341-346. |
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| 作者姓名： | 孔兰 梁虹 黄法苏 |
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| 作者单位： | 1. 贵州师范大学地理与生物科学学院,贵州,贵阳,550001
2. 贵州省水文水资源局,贵州,贵阳,550001 |
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| 基金项目： | 贵州省优秀青年科技人才培养计划;贵州省优秀科技教育人才省长基金;贵州省科学技术基金;贵州师范大学学生课题 |
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| 摘 要： | 以贵阳水文站近45年年径流量序列为例,利用Morlet小波变换对喀斯特流域径流量时序演变特性进行了分析预测。结果表明:(1)贵阳水文站年径流主要存在4a和25a两个时间尺度的周期变化,在这两种时间尺度下,径流演变呈现出较明显的丰、枯交替振荡。(2)2000年以后的10a左右,年径流量有由丰转为枯、逐步下降的趋势。(3)年平均径流量的丰、枯周期变化主要受年平均降水量的影响;人类活动对喀斯特流域年径流量有增加和减小两方面的影响,总体上会使径流量略有增加。
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| 关 键 词： | 径流量时间序列 演变 小波分析 多时间尺度 喀斯特流域 |
| 文章编号： | 1001-4810（2007）04-0341-06 |
| 收稿时间： | 2007-07-16 |
| 修稿时间： | 2007年7月16日 |
Analysis to runoff evolution features along time series in karst drainage basin-A case study in Guizhou province |
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| KONG Lan,LIANG Hong and HUANG Fa-su.Analysis to runoff evolution features along time series in karst drainage basin-A case study in Guizhou province[J].Carsologica Sinica,2007,26(4):341-346. |
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| Authors: | KONG Lan LIANG Hong and HUANG Fa-su |
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| Institution: | School of Geography and Biology , Guizhou Normal University,School of Geography and Biology , Guizhou Normal University and School of Geography and Biology , Guizhou Normal University |
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| Abstract: | By means of Morlet wavelet transform,the runoff evolution features along time series in karst drainage basins have been analyzed based on the recent 45 years annual runoff series at Guiyang hydrological station.The results show that:(1) The annual flow at Guiyang hydrological station varies mainly under two time scales,which are 4 years and 25 years.At the two scales,runoff evolution shows obviously oscillation between rainy and draught period.(2) In about 10 years after 2000,annual runoff tends to change from rainy period to draught period and to decline gradually.(3) The changes of rainy and draught period of annual runoff are mainly affected by the average annual precipitation.In karst drainage basin,the impacts of human activity on annual runoff have two aspects which are increasing and decreasing,and on the whole the runoff would slightly increase under the impacts. |
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| Keywords: | runoff time series evolution wavelet analysis multiple time scales karst drainage basin |
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