丹江鹦鹉沟小流域土壤侵蚀和养分损失定量分析
文献类型：期刊论文
| 作者 | 徐国策 ; 李占斌 ; 李鹏 ; 张铁钢 ; 汤姗姗 |
| 刊名 | 农 业 工 程 学 报
 |
| 出版日期 | 2013 |
| 卷号 | 29期号:10页码:160-08 |
| 关键词 | 土壤 soils 侵蚀 erosion 土地利用 land use 水土保持 soil and water conservation 修正通用土壤流失方程 RUSLE 丹江 Dan River watershed 土壤养分 soil nutrient |
| 其他题名 | Quantitative analysis of soil erosion and nutrient loss in Yingwugou |
| 中文摘要 | 小流域土壤侵蚀量和养分损失量的定量研究可为南水北调水源区的生态保护、水土保持和生态补偿提供重要的依据。该文在地理信息技术(geographic information system,GIS)的支持下,应用修正通用土壤流失方程(revised universal soil loss equation,RUSLE)估算了丹江鹦鹉沟流域的土壤侵蚀量和养分损失量,并进行了土壤侵蚀强度分级。结果表明,流域的年均土壤侵蚀模数为3140t/km2,侵蚀强度为中度。其中强度侵蚀以上的土地面积占流域总面积的24.1%,侵蚀量为4573.0t,却占年侵蚀总量的84.8%,其主要是坡度较大的坡耕地,是流域需要重点治理的区域。不同土地利用类型的土壤侵蚀量差异较大,林地、草地和农地的年均土壤侵蚀模数分别为509.7、1511.8和4606.5t/km2。林草地年侵蚀量较小,农地土壤侵蚀量占流域总侵蚀量的95.3%。坡度每增加5°,不同土地利用的土壤侵蚀模数增加量比坡长每增加5m的增加量要大1～2倍。研究区表土流失造成的全氮、全磷和有机质损失量分别为3.81、3.52和101.45t,其中农地的养分损失量最为严重... 更多 |
| 英文摘要 | The quantitative study of soil erosion and nutrient loss in a small watershed can provide an important basis for ecological protection, soil, and water conservation, and ecological compensation in the water source areas of the South to North Water Diversion Project. Revised universal soil loss equation (RUSLE) was used to estimate the soil erosion and nutrient loss supported by the geographic information system (GIS) in the Yingwugou watershed; however, the soil erosion intensity of the study area was classified. The results indicated that the annual soil erosion modulus in the Yingwugou watershed was 3140 t/km2. This falls in the category of moderate degree erosion. The area above high soil erosion intensity only accounted for 24.1% but the soil erosion amount was 4573.0 t, which accounted for 84.8% of the annual soil erosion amount. The high soil erosion area was mainly distributed in sloping cropland with big slopes, which was the key management area. Soil erosion amounts under different land-use types showed great differences. The annual soil erosion moduluses of forestland, grassland, and cropland were 509.7, 1511.8, and 4606.5 t/km2, respectively. The annual soil erosion amount of forestland and grassland was relatively small and the annual soil erosion amount of cropland accounted for 95.3% of the total soil erosion amount in the study area. For each additional 5° slope, the increased soil erosion modulus of different land uses was 1 to 2 times greater than that of each additional 5m for slope length. The annual loss amount of total nitrogen, total phosphorus, and organic matter in topsoil was 3.81, 3.52, and 101.45 t, respectively. The nutrient loss of cropland was serious. The annual loss moduluses of total nitrogen, total phosphorus, and organic matter with sediment were 1.01, 0.75, and 38.43 t/(km2a), respectively. The study could provide a scientific basis for the control of soil erosion and water loss, non-point source pollution, and the construction of clean, small watersheds in the water source area. |
| 语种 | 中文 |
| 公开日期 | 2014-10-15 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/5524]  |
| 专题 | 水土保持研究所_水保所知识产出(1956-2013) |
| 推荐引用方式 GB/T 7714 | 徐国策,李占斌,李鹏,等. 丹江鹦鹉沟小流域土壤侵蚀和养分损失定量分析[J]. 农 业 工 程 学 报,2013,29(10):160-08. |
| APA | 徐国策,李占斌,李鹏,张铁钢,&汤姗姗.(2013).丹江鹦鹉沟小流域土壤侵蚀和养分损失定量分析.农 业 工 程 学 报,29(10),160-08. |
| MLA | 徐国策,et al."丹江鹦鹉沟小流域土壤侵蚀和养分损失定量分析".农 业 工 程 学 报 29.10(2013):160-08. |
入库方式： OAI收割
来源：水土保持研究所
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