Temporal variations of sediment source from a reservoir catchment in the black soil region, Northeast China
文献类型：SCI/SSCI论文
| 作者 | Haiyan F. |
| 发表日期 | 2015 |
| 关键词 | Temporal variation Sediment source Catchment Sediment deposit Radionuclides Black soil region suspended sediment agricultural catchment gully erosion river record rates australia transport cs-137 dynamics |
| 英文摘要 | An understanding of long term temporal variations in sediment sources from a catchment is necessary to identify the major sources of sediment for effectively implementing soil conservation measures. For this purpose, a sediment column from Qixin reservoir and 410 samples from the three potential sediment sources were collected and radionuclides, soil organic carbon (SOC) and soil texture were analyzed. The relative contributions from different sources were determined using a simple mixing model with Cs-137 and Pb-210(ex). The mean contribution of sediment from cultivated lands to the sediment deposit was 50.87%, varying from 12.22% to 80.84%. Uncultivated lands contributed a mean of 5.22% ranging from 0.01% to 21.49% and gully/channel banks contributed 43.91% ranging from 15.15% to 86.91%. The relative contributions from the cultivated and uncultivated sediment sources to the reservoir deposit were significantly (P = 0.01) correlated with radioactivities, SOC and D-50. The temporal variations of sediment source were determined by yearly rainfall amount and rainfall erosivity. The results indicate that conservation practices should be prioritized in the cultivated lands and gullies/channels and temporal preparation strategies for heavy rainstorms should be considered using physical soil erosion models combined with field investigation. (C) 2015 Elsevier B.V. All rights reserved. |
| 出处 | Soil & Tillage Research |
| 卷 | 153 |
| 页 | 59-65 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0167-1987 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/38631]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Haiyan F.. Temporal variations of sediment source from a reservoir catchment in the black soil region, Northeast China. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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