水蚀风蚀交错区典型流域景观格局变化对土壤侵蚀过程的影响
文献类型:期刊论文
作者 | 马瞳宇 ; 张晓萍 ; 孙艳萍 ; 马芹 ; 雷泳南 ; 徐金鹏 ; 张庆印 |
刊名 | 水土保持学报
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出版日期 | 2012 |
卷号 | 26期号:04页码:43-48 |
关键词 | 景观格局 andscape pattern 土壤侵蚀 soil erosion “源”“汇”景观 “source-sink”landscape 景观空间负荷对比指数 location-weighted landscape contrast 水蚀风蚀交错区 |
其他题名 | Influences of Landscape Pattern Change to Soil Erosion Process in |
中文摘要 | 流域土壤侵蚀过程与景观格局的关系是评价流域景观格局合理性的关键问题。以GIS软件为分析平台,以最新提出的"源""汇"景观理论为基础,以水蚀风蚀交错区典型流域——六道沟流域1995,2010年土地利用/覆被格局为分析对象,以淤地坝淤积量作为土壤侵蚀监测信息,利用景观空间负荷对比指数分别分析了这2个时期各景观类型随空间要素配置、贡献权重和组成比例对土壤侵蚀过程的影响,最后对该指数的变化与土壤侵蚀模数的变化进行相关性分析。结果表明:2010年与1995年相比,六道沟流域各集水区的相对高度、坡度、投影距离、运移距离负荷对比指数均呈减小趋势,景观格局分布更加合理,水土流失危险性降低,与同期土壤侵蚀模数变化趋势相同。坡度负荷对比指数增量与土壤侵蚀模数增量相关性较弱,相对高度、投影距离、运移距离负荷对比指数增量与土壤侵蚀模数增量呈显著正相关,运移距离负荷对比指数反映土壤侵蚀过程对景观格局变化响应的效果最好。景观格局负荷对比指数与土壤侵蚀实测值之间均存在较大差异,应进一步改进模拟方法以达到准确量化的目标。坡度负荷对比指数不能很好地解释景观格局对土壤侵蚀过程的影响,需要在坡度取值方式上加以改进。 |
英文摘要 | Abstract:To study the responses of soil erosion process to landscape pattern change in water-wind erosion crisscross region,Loess Plateau,China,location-weighted landscape contrast index(LLI)was used to analyze influences of landscape change with configuration of spatial elements,contribution weight and composition to soil erosion processes in Liudaogou watershed,and finally the index change and soil erosion modulus change was calculated in the correlation analysis.Location-weighted landscape contrast index was based on“source-sink”theory and land use/cover in 1995and 2010,and was mapped in GIS software. Amount of sediment in warping dam land was obtained as soil erosion monitoring information.The results show that:The LLI in Liudaogou watershed showed decreasing trend and distribution of landscape pattern became more reasonable in 2010,compared with 1995.The risk of soil erosion reduced and soil erosion modulus over the same period showed the same trend.The LLI(flow length)increment which reflected changes in the landscape pattern better were significantly negatively related to the soil erosion modulus increment. Other LLI(relative height,slope,and projection distance)increment was weak correlation with soil erosion modulus increment and the trends were quite different to the measured value.This simulation method should be further improved in order to achieve accurate quantification. |
语种 | 中文 |
公开日期 | 2014-06-24 |
源URL | [http://ir.iswc.ac.cn/handle/361005/5316] ![]() |
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 | 马瞳宇,张晓萍,孙艳萍,等. 水蚀风蚀交错区典型流域景观格局变化对土壤侵蚀过程的影响[J]. 水土保持学报,2012,26(04):43-48. |
APA | 马瞳宇.,张晓萍.,孙艳萍.,马芹.,雷泳南.,...&张庆印.(2012).水蚀风蚀交错区典型流域景观格局变化对土壤侵蚀过程的影响.水土保持学报,26(04),43-48. |
MLA | 马瞳宇,et al."水蚀风蚀交错区典型流域景观格局变化对土壤侵蚀过程的影响".水土保持学报 26.04(2012):43-48. |
入库方式: OAI收割
来源:水土保持研究所
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