[1]PAN Yaying,LUO Yuezhen,WANG Yanan,et al.Characteristics of Evolution of Precipitation and Runoff in Xin’An River Basin[J].Research of Soil and Water Conservation,2018,25(06):121-125.
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Characteristics of Evolution of Precipitation and Runoff in Xin’An River Basin
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 06
Page number:
121-125
Column:
Public date:
2018-10-26
- Title:
- Characteristics of Evolution of Precipitation and Runoff in Xin’An River Basin
- Keywords:
- precipitation; runoff; M-K test; wavelet transform
- CLC:
- P49;P333.3;P426.6
- DOI:
- -
- Abstract:
- In order to grasp the evolution of precipitation and runoff in the Xin’an River Basin, Mann-Kendall test method and Morlet wavelet analysis method were used to analyze the monthly and inter-annual changes of precipitation and runoff data in the Xin’an River Basin in the past 57 years, and the mutations and the periodic characteristics of the annual series were measured and analyzed. The results show that it’s the most concentrated periods of rainfall and runoff in the Xin’an River Basin from April to July in spring and summer; the interannual variation of annual rainfall and runoff in Xin’an River Basin showed the increasing trend; the abnormal time of annual runoff and rainfall in the Xin’an River basin was basically same. The first main cycle of the both sets of data was 17 years, and the second and third cycles were 7 years and 3 years, respectively. At present, it is in the water-rich year in different cycles. The two sets of data were significantly correlated and had the characteristics of synchronization change. The Xin’an River Basin is a rain-fed river, and rainfall is the most important factor affecting runoff in the basin. The linear regression model was established by using two sequences of runoff and rainfall data in the Xin’an River Basin, and the fitting and forecasting effect were good, which has a certain application value in the long-term runoff forecasting service of river basin.
- References:
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1900-01-01