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Position: Home > Articles > Influence of Digital Elevation Model with Different Scales to the Graded Intensity of Soil Erosion Soil and Water Conservation in China 2007 (10) 26-28+58

不同比例尺数字高程模型对土壤侵蚀强度分级的影响

作  者:
高杨;吕宁;薛重生;马洪超
单  位:
武汉大学遥感信息工程学院;中国地质大学地球科学学院;中国科学院地理科学与资源研究所
关键词:
比例尺;数字高程模型;土壤侵蚀强度;分级
摘  要:
基于1∶5万和1∶50万2种不同比例尺的数字高程模型(DEM),结合土地利用类型、植被覆盖度等指标,对试验区土壤侵蚀强度进行了分级,并对不同比例尺DEM求算的坡度差异及其对土壤侵蚀强度分级的影响进行了分析。结果表明:1∶50万DEM较1∶5万DEM综合了大量信息,求算的坡度整体上偏小而使分级结果多集中在微度侵蚀区;不同地貌单元受DEM信息综合的影响不同,地形平坦的山前岗地区受影响最大,而地形复杂的中山区受影响相对较小。
译  名:
Influence of Digital Elevation Model with Different Scales to the Graded Intensity of Soil Erosion
作  者:
GAO Yang1,LV Ning2,XUE Chong-sheng1,et al.(1.China University of Geosciences,Wuhan,Hubei 430074,China;2.Institute of Geographical Sciences and Natural Resources Research of CAS,Beijing 100101,China)
关键词:
scale;digital elevation model;soil erosion intensity;gradation
摘  要:
It grades the soil erosion intensity of the pilot area based on the two different scale digital elevation models(DEM)of 1 ∶50 000 and 1 ∶500 000,combining with the indexes of land use and vegetation cover,analyzes and compares the influence of slope difference calculated by different scale DEM to the gradation of soil erosion intensity.The outcomes show that after comparing with 1 ∶50 000 DEM images,1 ∶500 000 DEM images have integrated a vast amount of information,the calculated slopes are generally smaller and make the most gradation results concentrating in light erosion area and;the different geomorphic unit has different influences of DEM information integration,the influence to piedmont where the topography is flat is the greatest and to the mid-mountainous region where the topography is complicated is relatively smaller.

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