[1]ZHAO Xiulan,ZHOU Rui,ZHANG Fu,et al.Change Trend of Precipitation, Runoff and Sediment in the Upper Zulihe River Basin from 1957 to 2016[J].Research of Soil and Water Conservation,2020,27(03):83-90.
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Change Trend of Precipitation, Runoff and Sediment in the Upper Zulihe River Basin from 1957 to 2016
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 03
Page number:
83-90
Column:
目次
Public date:
2020-04-20
- Title:
- Change Trend of Precipitation, Runoff and Sediment in the Upper Zulihe River Basin from 1957 to 2016
- Keywords:
- runoff and sediment characteristics; precipitation; Mann-Kendall test; Morlet wavelet; change trend
- CLC:
- P332.1; P332.5
- DOI:
- -
- Abstract:
- In order to explore the change trends of precipitation, runoff, sediment discharge and periodic distribution in semi-arid loess area, based on the data during the period of 1957—2016, the Mann-Kendall trend analysis, mutation test, Morlet wavelet and regression analysis method were used to analyze the precipitation, runoff and sediment discharge change in the upper reaches of Zulihe River. The results showed that the precipitation, runoff and sediment discharge presented the decreasing trend year by year, and there was an obvious cyclical change of abundance-drought during the years; from 1957 to 1974, precipitation presented the increasing trend, which reached a significant level from 1963 to 1968 (p<0.05), there was no significant increase or decrease in 1975—1994, showing a fluctuating change; from 1995 to 2016, it showed no significant decrease (p>0.05); the variation of runoff and sediment discharge was similar to precipitation; runoff and sediment discharge presented the increasing trend from 1957 to 1974, and there was no significant decrease from 1975 to 1994, and significant decrease from 1995 to 2016(p<0.05). The annual precipitation had the average change periods of 3-year, 5-year, 13-year and 18-year; runoff had the average change periods of 3-year, 6-year and 18-year, and the sediment discharge had the average change periods of 3-year, 4-year, 5-year and 18-year. The response of runoff and sediment discharge to the change of precipitation gradually weakened, and the response of runoff and sediment discharge to soil and water conservation measures gradually enhanced.
- References:
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Last Update:
2020-04-30