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[1]ZHANG Zhenzhen,SHAN Yangong,WU Mingzhou,et al.Soil and Water Conservation Effects of Different Agricultural Measures in Mountains and Hills of Nanjing[J].Research of Soil and Water Conservation,2021,28(01):80-84.

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Soil and Water Conservation Effects of Different Agricultural Measures in Mountains and Hills of Nanjing

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 01 Page number: 80-84 Column: Public date: 2021-01-10

Title:: Soil and Water Conservation Effects of Different Agricultural Measures in Mountains and Hills of Nanjing

Author(s):: ZHANG Zhenzhen¹, SHAN Yangong¹, WU Mingzhou²,; (1.Nanjing Branch of Jiangsu Hydrological and Water Resources Survey Bureau, Nanjing 210008, China; 2.Academy of Environmental Planning and Design, Nanjing 210008, China; 3.Jiangsu Water Source Company of South-to-North Water Transfer Project, Nanjing 210008, China)

Keywords:: agricultural measures; erosive rainfall; soil and water conservation; Nanjing City

CLC:: S157.2

DOI:: -

Abstract:: Based on the observations of the measured daily rainfall(2015—2017)data, the maximum 30-minute rainfall intensity and slope runoff and sediment yield with four vegetation measures, the effects of different types of erosive rainfall on the soil and water conservation on loess sloping land under different vegetation coverage were systematically analyzed. The results are shown as follows.(1)Most of the erosive rainfall in the research area occurred in the period from April to October. The frequency of the total rainfall and the highest total rainfall concentrated in July.(2)Erosive rainfall can be divided into five types. The frequency of the erosive rainfall decreased in the order: Pattern Ⅲ(low precipitation, low I₃₀)>Pattern Ⅴ(moderate precipitation , low I₃₀)>Pattern Ⅱ(low precipitation, high I₃₀)>Pattern Ⅳ(moderate precipitation, moderate I₃₀)>Pattern Ⅰ(high precipitation, moderate I₃₀).(3)The erosive force of the Pattern Ⅰ is the largest and the erosive force of the Pattern Ⅲ is the lowest. The sediment reduction rate of the corn field is the highest under the types of Pattern Ⅰ, and the sediment reduction rate of the forestland is the highest under the other four rainfall types. The runoff reduction rate of the peanut field is the highest under the types of the Pattern Ⅱ, Pattern Ⅲ and Pattern Ⅴ. The runoff reduction rate of the rape field is the highest under the types of the Pattern Ⅰ. The runoff reduction rate of the corn field is the highest under the types of the Pattern Ⅳ.

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Last Update: 2021-01-15