| 紫色丘陵区小流域土壤侵蚀产沙空间分布的 137Cs法初步研究 |
| |
| 引用本文： | 侯建才,李占斌,李勉. 紫色丘陵区小流域土壤侵蚀产沙空间分布的 137Cs法初步研究[J]. 农业工程学报, 2007, 23(3): 46-50 |
| |
| 作者姓名： | 侯建才 李占斌 李勉 |
| |
| 作者单位： | (1974-)，男，工程师，博士生，主要从事土壤侵蚀和水土保持方面的研究。西安西安理工大学748信箱，710048。Email:houjiancai2000@126.com;西安理工大学水资源研究所，西安 710048；黄土高原土壤侵蚀与旱地农业国家重点实验室，杨凌712100;黄河水利委员会黄河水利科学研究院，郑州 450003 |
| |
| 基金项目： | 中欧合作项目“减少紫色丘陵区土壤、水分和养分流失”资助 |
| |
| 摘 要： | 该文通过紫色丘陵区响水滩小流域不同土地利用类型、不同坡度和坡长、不同地貌部位土壤剖面中 137Cs含量的测定与分析，对其侵蚀空间分布进行了估算。研究结果表明：该流域 137Cs含量的背景值为1870 Bq/m2；流域内坡耕地、林地的年平均侵蚀强度分别为4468、1759 t/(km2·a)；土壤侵蚀量与坡长、坡度均指数相关；丘顶、丘坡和鞍部的年平均侵蚀强度分别为2125、4676、3625 t/(km2·a)。结果表明土地利用类型、坡长和坡度、地貌部位对土壤侵蚀量影响很大，坡耕地是该流域泥沙的主要来源。
|
| 关 键 词： | 137Cs； 土壤侵蚀； 空间分布； 紫色丘陵区 |
| 文章编号： | 1002-6819(2007)3-0046-05 |
| 收稿时间： | 2006-04-13 |
| 修稿时间： | 2006-04-13 |
Preliminary study on spatial distribution of soil erosion in a small watershed in purple hilly area using 137Cs tracer |
| |
| Hou Jiancai,Li Zhanbin and Li Mian. Preliminary study on spatial distribution of soil erosion in a small watershed in purple hilly area using 137Cs tracer[J]. Transactions of the Chinese Society of Agricultural Engineering, 2007, 23(3): 46-50 |
| |
| Authors: | Hou Jiancai Li Zhanbin Li Mian |
| |
| Affiliation: | Institute of Water Resources Research, Xi'an University of Technology, Xi'an 710048, China;Institute of Water Resources Research, Xi'an University of Technology, Xi'an 710048, China;State Key Laboratory of Soil Erosion and Dry Farming on Loess Plateau, Yangling 712100, China;Yellow River Institute of Hydraulic Research, Yellow River Conservancy Commission, Zhengzhou 450003, China |
| |
| Abstract: | The 137Cs contents in soil profiles were analyzed under different land use types, gradients, slope lengths, and landform positions in Xiangshuitan watershed in purple hilly area. Spatial distribution of soil erosion in Xiangshuitan small watershed was estimated. Results show that the reference 137Cs content is 1870 Bq/m2. Average erosion intensity is 4468 t/(km2·a) in cultivated land and 1759 t/(km2·a) in forest land. Erosion amount is exponentially related with slope length and gradient. Average annual soil erosion intensity in hilltop, hillside and neck are 2125, 4676, 1759 t/(km2·a), respectively. Soil erosion is significantly influenced by the land use types, slope lengths, gradients and landform positions. The cultivated land is the chief source of sediment in Xiangshuitan watershed in the purple hilly area. |
| |
| Keywords: | 137Cs soil erosion spatial distribution purple hilly area |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《农业工程学报》浏览原始摘要信息 |
|
点击此处可从《农业工程学报》下载全文 |
