[1]YE Zhengwei,YIN Peng.Changes of Precipitation Concentration Degree and Precipitation Concentration Period in Flood Season in the Huaihe River Basin[J].Research of Soil and Water Conservation,2018,25(05):295-299.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 05
Page number:
295-299
Column:
Public date:
2018-09-06
- Title:
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Changes of Precipitation Concentration Degree and Precipitation Concentration Period in Flood Season in the Huaihe River Basin
- Author(s):
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YE Zhengwei, YIN Peng
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School of Urban and Environmental Sciences, Huaiyin Normal University, Huaian, Jiangsu 223300, China
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- Keywords:
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Huaihe River Basin; precipitation in flood season; precipitation concentration degree; precipitation concentration period
- CLC:
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P932;P467
- DOI:
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- Abstract:
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Precipitation variability is a hot issue in the hydrological cycle field, and it is also the key reference for the flood and drought mitigation and water resources utilization. Daily precipitation data in the flood season of 30 meteorological stations in the Huaihe River Basin (HRB) from 1960 to 2014 were calculated. Based on the calculation of precipitation concentration index, precipitation concentration degree (PCD) and precipitation concentration period (PCP) were analyzed by the trend test methods and the wavelet analysis. The results showed that:(1) the inter-annual variation of precipitation in the HRB was large, it had a very slight increasing trend, less precipitation was observed in 1970s and the 1990s, but more precipitation was found ever since 2000s; (2) the PCD varied with an insignificant decreasing trend, the 1960s and the 1980s were the largest and lowest decades, respectively; an abrupt change of PCD occurred in 1983; the mean PCP occurred in the early July; the PCP was less in 1980s but larger since 1990s, there was an abrupt change in 1990 in the change of PCP; (3) a period of about 2 year could be checked for PCD and a period of about 3~5 years was quite stable from 1991 to 2004, a period of about 6~9 years was stable between 1970 and 1982, and a positive phase period of 4~5 years was significant for the PCD and PCP.