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| 坡度和雨强对重庆市黄壤旱坡地产流产沙特征的影响 | |
| 引用本文： | 代数,蒋光毅,夏清,陈正发,史东梅,罗歆.坡度和雨强对重庆市黄壤旱坡地产流产沙特征的影响[J].水土保持学报,2011,25(4):1-5,11. |
| 作者姓名： | 代数 蒋光毅 夏清 陈正发 史东梅 罗歆 |
| 作者单位： | 1. 西南大学资源环境学院,重庆,400715 2. 重庆市水土保持生态环境监测总站,重庆,401147 3. 万盛区水利局,重庆,400800 |
| 基金项目： | 重庆市科委项目(CSTC2009AC1007); 重庆市水利局科技项目“重庆市土壤侵蚀模数研究”(2008) |
| 摘 要： | 黄壤作为重庆市山地主要的土壤类型之一,对重庆市农业生产有重要影响。通过人工模拟降雨试验,研究不同坡度和降雨强度条件对黄壤旱坡地产流产沙特征影响及响应过程,结果表明：（1）输沙率随降雨强度的增大而增大,对于短历时强降雨来说,输沙率保持在一个相对平均的水平,比长历时中强度降雨的输沙率大。在坡度0°～25°以内,黄壤旱坡地产流量与坡度之间的关系可以用多相式进行拟合,得到产流临界坡度为22.83°;（2）土壤侵蚀量与坡度符合二次抛物线关系,随坡度的增加出现临界坡度,重庆市黄壤旱坡地土壤侵蚀的临界值坡度为24.7°。在降雨特征参数中,平均降雨强度是反映黄壤旱坡地泥沙量、径流系数和径流泥沙含量的最好特征参数,时段最大降雨强度I10最能反映黄壤旱坡地径流量的变化特征;（3）在10°,15°,20°3个不同坡度下,径流量和产沙量与雨强均表现为幂函数关系,相关系数均在大于0.05置信区间呈显著相关性。 |
| 关 键 词： | 径流量 产沙量 临界坡度 旱坡地 黄壤 |
Effects of Slopes and Rainfall Intensities on Runoff and Sediment Characteristic of Arid Hillside Land with Yellow Soil in Chongqing |
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| DAI Shu,JIANG Guang-yi,XIA Qing,CHEN Zheng-f,SHI Dong-mei,LUO Xin.Effects of Slopes and Rainfall Intensities on Runoff and Sediment Characteristic of Arid Hillside Land with Yellow Soil in Chongqing[J].Journal of Soil and Water Conservation,2011,25(4):1-5,11. | |
| Authors: | DAI Shu JIANG Guang-yi XIA Qing CHEN Zheng-f SHI Dong-mei LUO Xin |
| Institution: | DAI Shu1,JIANG Guang-yi2,XIA Qing3,CHEN Zheng-fa1,SHI Dong-mei1,LUO Xin1(1.College of Resources and Environment,Southwest University,Chongqing 400716,2.Chongqing Municipal Environmental Monitoring Station of Soil and Water ConservationEcology,Chongqing 401147,3.Bureau of Water Resources of Wansheng,Chongqing 400800) |
| Abstract: | Yellow soil is one of the main types of soil in Chongqing,and it has great influence on agricultural.By artificial rainfall simulation experiments,the paper was mainly studied on characteristics of runoff,sediment yield and its response of process of different slope and different rainfall intensity conditions on the arid hillside land with yellow soil.The results showed that:(1)Sediment transport rate increased with rainfall intensity increases,it was at a level of relative to the average to the heavy rainf... |
| Keywords: | runoff sediment production critical slope sloping dryland yellow soil |
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