| 土壤侵蚀的中子活化示踪法研究 |
| |
| 引用本文： | 石辉,刘普灵,田均良.土壤侵蚀的中子活化示踪法研究[J].水科学进展,2000,11(2):126-132. |
| |
| 作者姓名： | 石辉 刘普灵 田均良 |
| |
| 作者单位： | 中国科学院水利部水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨陵712100 |
| |
| 摘 要： | 利用中子活化示踪法研究坡面土壤的侵蚀过程,发现坡面的相对侵蚀量从坡脚到坡顶随坡长的变化符合Weibull分布,其形状参数主要受降雨量、降雨历时和径流深度的影响,尺度参数主要与平均雨强、I30相关.坡面在侵蚀的同时也发生沉积,一般来说短历时高强度的降雨沉积量较小,而长历时低强度的降雨沉积量较大,某一部位侵蚀产沙的沉积量与其距离之间有y=axb的关系.坡面径流直接影响着坡面的输移比,当径流深和径流系数较高时,输移比接近于1,否则输移比降低.
|
| 关 键 词： | 土壤侵蚀 中子活化示踪法 侵蚀分布 沉积过程 |
| 收稿时间： | 1999-03-11 |
| 修稿时间： | 1999-03-11 |
Study on the Neutron Activate Analysis Method for Soil Erosion |
| |
| SHI Hui,LIU Pu-ling,TIAN Jun-liang.Study on the Neutron Activate Analysis Method for Soil Erosion[J].Advances in Water Science,2000,11(2):126-132. |
| |
| Authors: | SHI Hui LIU Pu-ling TIAN Jun-liang |
| |
| Affiliation: | Institnte of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shanxi 712100, China |
| |
| Abstract: | A new method called Neutron Activate Analysis Tracer Method(NAATM)for studying soil erosion was formed through combination tracer method with neutron activate analysis technique,and the method was used to study the erosion process on slope.The research results showed that the changes of relative erosion amount with the distance from slope bottom to top accord with the Weibull distribution.The shape parameters of the Weibull distribution are mainly affected by precipitation,duration of rainfall and depth of runoff,and the scale parameters are related with aver age rainfall intensity and I30.Soil erosion and deposition happened at the same time on slope.Generally,deposition is less under the short duration rainfall with high rainfall intensity than that of long duration rainfall with low intensity.The relationship between deposition amount at acertain slope position and its distance was derived.The runoff directly affects delivery ratio(DR).When the depth and coefficient of runoff is large,the DR approaches 1,otherwise the DR will decreases. |
| |
| Keywords: | soil eroson neutron activate analysis tracer method(NAATM) erosion distribution deposition process |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《水科学进展》浏览原始摘要信息 |
|
点击此处可从《水科学进展》下载全文 |
|
