|
|
- 2018
坡度截断对分布式土壤侵蚀学坡长提取的影响
|
Abstract:
地形是影响土壤侵蚀的重要因子，分布式土壤侵蚀学坡长是地形因子的重要参数。坡长与土壤侵蚀过程相适应，在一定条件下停止累计而截断。坡度变化是坡长提取的截断条件之一，但坡度变化对提取结果的影响研究还不够深入。以数学曲面和黄土高原县南沟流域的数字高程模型作为数据源，使用LS_TOOL方法提取坡长，并对坡度变化引起的坡长截断结果进行对比和主成分分析。结果表明，下坡坡度减小幅度越大，坡度截断效果越明显；坡度小于2.86°的截断参数R1和坡度大于或等于2.86°的截断参数R2与坡长最大值和坡长平均值均正相关；在黄土高原地区，陡坡、沟道较多，相对R2的影响，R1对坡长的影响较小。坡度变化的截断设置在R1>0.7，R2>0.5时，坡长变化较明显，建议黄土高原地区侵蚀坡长的坡度截断设置值为R1=0.7，R2=0.5
| [1] | Liu Xuejun, Jin Bei, Hu Jiapei, et al. Quantitative Analysis of Error in Extracting Flow Length from Grid-Based Digital Elevation Model[J].Geomatics and Information Science of Wuhan University, 2012, 37(7):757-761,779(刘学军, 晋蓓, 胡加佩, 等. 格网DEM上径流长度计算误差的定量分析[J]. 武汉大学学报信息科学版, 2012, 37(7):757-761,779) |
| [2] | Lep？ J, ？milauer P. Multivariate Analysis of Ecological Data Using Canoco 5[M]. 2nd ed. Cambridge:Cambridge University Press,2014 |
| [3] | Yang Qinke, Guo Minghang, Li Zhiguang, et al. Extraction and Preliminary Analysis of Soil Erosion Terrain Factors in China[J].Soil and Water Conservation in China, 2013(10):17-21(杨勤科, 郭明航, 李智广, 等. 全国土壤侵蚀地形因子提取与初步分析[J]. 中国水土保持, 2013(10):17-21) |
| [4] | Hickey R. Slope Angle and Slope Length Solutions for GIS[J]. Cartography, 2000, 29(1):1-8 |
| [5] | Renard K G. Predicting Soil Erosion by Water:A Guide to Conservation Planning with the Revised Universal Soil Loss Equation (RUSLE)[M]. USA:United States Department of Agriculture, 1997 |
| [6] | Liu B Y, Zhang K L, Xie Y. An Empirical Soil Loss Equation[C]. The 12th International Soil Conservation Organization Conference, Beijing, China, 2002 |
| [7] | Moore I D, Wilson J P. Length-Slope Factors for the Revised Universal Soil Loss Equation:Simplified Method of Estimation[J]. Journal of Soil & Water Conservation, 1992, 47(5):423-428 |
| [8] | Desmet P J J, Govers G. A GIS Procedure for the Automated Calculation of the USLE LS Factor on Topographically Complex Landscape Units[J].Journal of Soil and Water Conservation, 1996, 51(5):427-433 |
| [9] | Zhang H, Yang Q, Li R, et al. Extension of a GIS Procedure for Calculating the RUSLE Equation LS Factor[J]. Computers & Geosciences, 2013, 52(1):177-188 |
| [10] | Yang X H. Digital Mapping of RUSLE Slope Length and Steepness Factor Across New South Wales, Australia[J]. Soil Research, 2015, 53(2):216-225 |
| [11] | Zhang H, Yao Z, Yang Q, et al. An Integrated Algorithm to Evaluate Flow Direction and Flow Accumulation in Flat Regions of Hydrologically Corrected DEMs[J]. Catena, 2017, 151:174-181 |
| [12] | Zhang H, Wei J, Yang Q,et al. An Improved Method for Calculating Slope Length (λ) and the LS Parameters of the Revised Universal Soil Loss Equation for Large Watersheds[J]. Geoderma, 2017, 308:36-45 |
| [13] | Winchell M F, Jackson S H, Wadley A M, et al. Extension and Validation of a Geographic Information System-Based Method for Calculating the Revised Universal Soil Loss Equation Length-Slop Factor for Erosion Risk Assessments in Large Watersheds[J]. Journal of Soil and Water Conservation, 2008, 63(3):105-111 |
| [14] | Jin Bei, Liu Xuejun, Zhen Yan, et al. Analysis of Slope Length Extracted from Grid-Based Digital Elevation Model in ArcGIS Environment[J].Journal of Geo-Information Science, 2010, 12(5):700-706(晋蓓, 刘学军, 甄艳, 等. ArcGIS环境下DEM的坡长计算与误差分析[J]. 地球信息科学学报, 2010, 12(5):700-706) |
| [15] | Zhang Zhaolu. The Algorithm Design and Optimization for Topographic Factors of Universal Soil Loss Equation Based on DEM[J].Research of Soil and Water Conservation, 2007, 14(3):203-205(张照录. 基于DEM通用土壤流失方程地形因子的算法设计与优化[J]. 水土保持研究, 2007, 14(3):203-205) |
| [16] | Van Remortel R D, Maichle R W, Hickey R J. Computing the LS Factor for the Revised Universal Soil Loss Equation Through Array-Based Slope Processing of Digital Elevation Data Using a C++Exe-cutable[J]. Computers & Geosciences, 2004, 30(9):1043-1053 |
| [17] | Zhang Hongming, Song Zelu, Yang Jiangtao, et al.Influence of DEM Super-Resolution Reconstruction on Terraced Field Slope Extraction[J]. Transactions of the Chinese Society for Agricultural Machinery, 2017, 48(1):112-118(张宏鸣, 宋泽鲁, 杨江涛, 等. DEM超分辨率重构对梯田坡度提取的影响研究[J].农业机械学报, 2017, 48(1):112-118) |
| [18] | Luo Hong, Ma Youxin, Liu Wenjun, et al. Estimation of Topographical Factors in Revised Universal Soil Loss Model Based on Maximum up Stream Flow Path[J]. Chinese Journal of Applied Ecology, 2010, 21(5):1185-1189(罗红, 马友鑫, 刘文俊, 等采用最大溯源径流路径法估算RUSLE模型中地形因子探讨[J]. 应用生态学报, 2010, 21(5):1185-1189) |
| [19] | Zhang Hongming, Yang Qinke, Li Rui, et al. Research on the Estimation of Slope Length in Distri-buted Watershed Erosion[J]. Journal of Hydraulic Engineering, 2012, 43(4):437-444(张宏鸣, 杨勤科, 李锐, 等. 流域分布式侵蚀学坡长的估算方法研究[J]. 水利学报, 2012, 43(4):437-444) |
| [20] | Orlandini S, Moretti G, Gavioli A. Analytical Basis for Determining Slope Lines in Grid Digital Elevation Models[J]. Water Resources Research, 2014, 50(1):526-539 |
| [21] | The State Bureau of Surveying and Mapping. CH/T 1015.1-2007 Technical Rules for Producing Digital Products of 1:100001:50000 Fundamental Geographic Information Part 1:Dingital Line Graphs(DLG)[S]. Beijing:Surveying and Mapping Press, 2007(国家测绘局. CH/T 1015.1-2007基础地理信息数字产品1:100001:50000生产技术规程第1部分:数字线划图(DLG)[S]. 北京:测绘出版社,2007) |
| [22] | McCool D K, Brown L C, Foster G R, et al. Revised Slope Steepness Factor for the Universal Soil Loss Equation[J]. Transactions of the American Society of Agricultural Engineers, 1987, 30(5):1387-1396 |
