|
|||||
|
|
| 紫色土丘陵区典型坡地产流及产沙模拟试验研究 | |
| 引用本文： | 辛伟,朱波,唐家良,罗专溪,刘益军,史东梅.紫色土丘陵区典型坡地产流及产沙模拟试验研究[J].水土保持通报,2008,28(2):31-35. |
| 作者姓名： | 辛伟 朱波 唐家良 罗专溪 刘益军 史东梅 |
| 作者单位： | 1. 西南大学,资源环境学院,重庆,400715;中国科学院,水利部,成都山地灾害与环境保护研究所,四川,成都,610041 2. 中国科学院,水利部,成都山地灾害与环境保护研究所,四川,成都,610041 3. 西南大学,资源环境学院,重庆,400715 |
| 基金项目： | 中国科学院"西部之光"人才培养计划 |
| 摘 要： | 应用人工模拟降雨实验,对紫色土丘陵区坡地产流及产沙特征进行了研究.(1)地表径流初始产流时间随着雨强和坡度的增加而加快,在0.7～9.5 min之间变化;壤中流初始产流时间变化复杂,在2.6～46.4 min之间变化,雨强是影响低坡度壤中流初始产流时间的主要因子;(2)地表径流累积量与雨强、坡度均成正比关系,壤中流累积量随着坡度和雨强的增大呈现出减小趋势;(3)地表径流雨后消退迅速,退水常数k(Barnes法)值为0.41～0.66,壤中流消退缓慢,退水常数为0.91～0.99;(4)同一降雨历时下,相对坡度而言,雨强是决定产沙量的主要因子,产沙量在23.4～972.3 g/(m2·h)之间变化;在同一雨强下,产沙量随着坡度的增大而增加.就紫色土坡地而言,改良耕作制度和耕作措施,实施因地制宜的水保措施,提高坡地土壤入渗率和持水量,使降雨径流以壤中流形式产生,能更有效地防治水土流失. |
| 关 键 词： | 人工降雨 地表径流 壤中流 径流消退 侵蚀 紫色土丘陵区 紫色土坡地 产流 产沙量 模拟试验 研究 Soils Area Hill Sediment Yield Runoff Characteristics Study 防治水土流失 流形 降雨径流 持水量 土壤入渗率 水保措施 实施 |
| 文章编号： | 1000-288X(2008)02-0031-05 |
| 收稿时间： | 2007/10/16 0:00:00 |
| 修稿时间： | 2007年10月16 |
Simulation Study of Characteristics of Runoff and Sediment Yield in the Hill Area with Purple Soils |
|
| XIN Wei,ZHU Bo,TANG Jia-liang,LUO Zhuan-xi,LIU Yi-jun and SHI Dong-mei.Simulation Study of Characteristics of Runoff and Sediment Yield in the Hill Area with Purple Soils[J].Bulletin of Soil and Water Conservation,2008,28(2):31-35. | |
| Authors: | XIN Wei ZHU Bo TANG Jia-liang LUO Zhuan-xi LIU Yi-jun and SHI Dong-mei |
| Institution: | School of Resources and Environment,Southwest University,Chongqing 400715,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu,Sichuan 610041,China;School of Resources and Environment,Southwest University,Chongqing 400715,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu,Sichuan 610041,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu,Sichuan 610041,China;School of Resources and Environment,Southwest University,Chongqing 400715,China;School of Resources and Environment,Southwest University,Chongqing 400715,China |
| Abstract: | Based on simulated rainfall experiments,the characteristics of runoff and sediment yield were studied on purple soils in the hilly area of Sichuan Basin.Results showed that the time lag of surface runoff increased with increased rainfall intensity and slope gradient and it ranged from 0.7 to 9.5 min.The time lag of subsurface flow ranged from 2.6 to 46.4 min.Rainfall intensity was the most important factor influencing subsurface flow.The cumulated amount of surface runoff increased with rainfall intensity and slope gradient,while the subsurface flow amount decreased with rainfall intensity and slop gradient.Surface runoff receded rapidly and the recession coefficient(k) ranged from 0.41 to 0.66.However,the subsurface flow receded slowly with k ranging from 0.91 to 0.99.Rainfall intensity was the key factor of sediment yield for the same rainfall duration and sediment yield varied from 23.4 to 972.3 g/(m2·h) with increased rainfall intensity.Sediment yield increased with increased slope gradient for the same rainfall intensity. |
| Keywords: | simulated rainfall surface runoff soil water flow runoff recession soil erosion |
| 本文献已被 万方数据 等数据库收录！ | |
| 点击此处可从《水土保持通报》浏览原始摘要信息 | |
| 点击此处可从《水土保持通报》下载免费的PDF全文 | |