|
|||||
|
|
| ~7Be示踪法估算土壤侵蚀速率模型计算结果比较 | |
| 引用本文： | 张风宝,杨明义,王光谦.~7Be示踪法估算土壤侵蚀速率模型计算结果比较[J].水土保持学报,2010,24(2). |
| 作者姓名： | 张风宝 杨明义 王光谦 |
| 作者单位： | 1. 清华大学,水沙科学与水利水电工程国家重点实验室,北京,100084;西北农林科技大学/中科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,杨凌,712100 2. 西北农林科技大学/中科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,杨凌,712100 3. 清华大学,水沙科学与水利水电工程国家重点实验室,北京,100084 |
| 基金项目： | 国家“973”计划(2007CB407201); 国家青年科学基金(40901127); 博士后科学基金(20080440387); 教育部“新世纪优秀人才”支持计划 |
| 摘 要： | 在总结现有7Be示踪法估算土壤侵蚀速率模型的基础上,通过坡耕地径流小区野外模拟降雨实测侵蚀资料,比较了Walling、杨明义和Wilson等所建的利用7Be示踪法估算土壤侵蚀速率模型的计算结果,并验证各模型的准确度。结果表明,对于不发生细沟侵蚀的小区,3个模型的计算值都有较高的准确度,但Wilson模型相对其它两个模型计算结果误差较大;对于发生细沟侵蚀的小区,Walling模型和杨明义模型估算坡面细沟间侵蚀量的绝对差值较小,但大于不发生细沟侵蚀小区的绝对差值;Wilson模型能够比较准确计算坡面的总侵蚀量,与实测值相比较,相对误差为3.59%～14.47%,不发生细沟侵蚀的小区相对误差大于发生细沟侵蚀的小区。随着侵蚀强度的增大,3个模型计算结果的准确度呈降低趋势。 |
| 关 键 词： | 土壤侵蚀 7Be示踪 模拟降雨 模型验证 |
Comparison of the Models of Using ~7Be to Estimate Soil Erosion Rate |
|
| ZHANG Feng-bao,YANG Ming-yi,WANG Guang-qian.Comparison of the Models of Using ~7Be to Estimate Soil Erosion Rate[J].Journal of Soil and Water Conservation,2010,24(2). | |
| Authors: | ZHANG Feng-bao YANG Ming-yi WANG Guang-qian |
| Institution: | ZHANG Feng-bao1,2,YANG Ming-yi2,WANG Guang-qian1 (1.State Key Laboratory of Hydroscience , Engineering,Tsinghua University,Beijing 100084,2.State Key Laboratory of Soil Erosion , Dryl, Farming on the Loess Plateau,Institute of Soil , Water Conservation,Chinese Academy of Sciences , Ministry of Water Resources/Northwest A&F University,Yangling,Shaanxi 712100) |
| Abstract: | 7Be,which is a excellent soil erosion tracer,have been employed for documenting short-term or individual-event soil redistribution on cultivated land or bare land in recent decades in many areas of the world.The models which were established by Walling,Yang and Wilson et al.for using 7Be to estimate soil erosion rate were summarized and the comparison of the results of these models were conducted by the measured data which got from the runoff plots under the simulated rainfall.The results showed that the Wa... |
| Keywords: | soil erosion 7Be measurement simulated rainfall model verification |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |