[1]XIONG Ya-lan,WANG Chang-quan,ZHANG Ke-li.Periodic Changes of the Annual Precipitation and Annual Natural Runoff in Beipan River Watershed[J].Research of Soil and Water Conservation,2010,17(05):30-34.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
17
Number of periods:
2010 05
Page number:
30-34
Column:
Public date:
2010-10-20
- Title:
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Periodic Changes of the Annual Precipitation and Annual Natural Runoff in Beipan River Watershed
- Author(s):
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XIONG Ya-lan1, WANG Chang-quan1, ZHANG Ke-li2
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1. School of Natural Resources and Environmental Science, Sichuan Agriculture University, Ya’an, Sichuan 625014, China;
2. State Key Laboratory of Earth Surface Processes and Resource Ecology, School of Geography and Remote Sensing Science, Beijing Normal University;
Beijing 100875, China;
3. Observation Station for Soil and Water Conservation of Guizhou Province, Guiyang 210093, China
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- Keywords:
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wavelet transform; annual precipitation; annual natural runoff; periodic changes
- CLC:
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P426.614
- DOI:
-
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- Abstract:
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Research on the multiple time-frequency analysis of annual precipitation and annual runoff is help to integrated manage of Karst area, efficiently use of water resources, constitute criterion of designing water and electricity establishment. This paper analyzes tendency and periods of annual precipitation and annual natural runoff in Beipan River watershed based on Morlet wavelet transform. The results showed: annual precipitation has middling variance and no obvious increase tendency from 1956-2000, but annual runoff has middling variance and obvious increase tendency; periodic changes of annual precipitation and annual runoff are isochronous; periods of precipitation is 23, 45, 5, 12 years, and 23 years are overall;periods of runoff is 24, 6, 13, 40 years, and 24 years are overall.