[1]JIANG Wen,WANG Junhong,SUN Peng,et al.Study on Runoff and Sediment Characteristics of Terrace Land Under Different Rainfall and Vegetation Conditions in Dabie Mountain[J].Research of Soil and Water Conservation,2022,29(01):28-35+43.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 01
Page number:
28-35+43
Column:
Public date:
2022-02-20
- Title:
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Study on Runoff and Sediment Characteristics of Terrace Land Under Different Rainfall and Vegetation Conditions in Dabie Mountain
- Author(s):
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JIANG Wen1, WANG Junhong2, SUN Peng1,3, WANG Wen2, QIAO Xinrui1, JIAN Ningjie1, HAN Lewei1
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(1.School of Geography and Tourism, Anhui Normal University, Wuhu,Anhui 241002,China; 2.Huoshan Soil and Water Conservation Experimental Station, Huoshan,Anhui 237266,China; 3.Key Laboratory of Environmental Evolution and Natural Disasters, Ministry of Education, Beijing Normal University, Beijing 100875,China)
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- Keywords:
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runoff and sediment yield; vegetation types; rainfall level; growth period; Dabie Mountain Region
- CLC:
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S157.1
- DOI:
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- Abstract:
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Dabie Mountain area is one of regions of the national soil and water conservation key construction projects. In order to explore the effects of different rainfall grades and vegetation types on runoff and sediment yield under different time scales, a quantitative analysis was carried out based on the observed data of natural rainfall, runoff and sediment yield from 2011 to 2018 in Huoshan Soil and Water Conservation Experimental Station. The results are as follows.(1)In the time series analysis of the rainfall events, the rainfall in 2011—2018 had a trend of heavier rainfall and more rapid rainfall. Compared with other vegetation such as soybeans, tea trees had significant sediment retention capabilities. Moreover, the benefits of sediment reduction were higher than the benefits of runoff reduction. Eight years of soybean planting had made soil erosion worse.(2)At the 99% confidence level, the sediment production risk of soybeans was 21.29 times that of tea plants.(3)As the rainfall level increased, the risk of sediment production gradually increased. Among them, the risk of torrential rain and heavy downpour has increased significantly compared with other rainfall levels.(4)The occurrence of sediment production in tea plants was related to the instantaneous rainfall intensity, and the rain intensity was more important for sediment generation than the amount of rainfall. Sediment generation was mostly caused by runoff in soybean fileds, and the amount of rainfall was more important for sediment than rainfall intensity. The average accuracy of tea plant evaluation was higher than that of soybean.(5)Soybeans had better water and sediment retention benefits when they were in the phases of three-leaf period-flowering period and pod-bearing period-maturity period, while the peak of runoff and sediment yield during the three-leaf period-flowering period was mainly caused by heavy rainfall. These results show the characteristics and influencing factors of runoff and sediment production of tea and soybeans under different rainfall levels and growth conditions, and can provide a scientific basis for vegetation planting and protection in Ta-pieh mountain area for the purpose of reducing soil and water losses.