[1]杨 锋,周 毅,陈 旻.沟沿线约束的黄土水蚀性沟谷提取[J].山地学报,2016,(04):504-510.[doi:10.16089/j.cnki.1008-2786.000156]
　YANG Feng,ZHOU Yi,CHEN Min.Loess Shoulder-line Constrained Method for Waterworn Gullies Extraction on Loess Plateau[J].Mountain Research,2016,(04):504-510.[doi:10.16089/j.cnki.1008-2786.000156]
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沟沿线约束的黄土水蚀性沟谷提取()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2016年04期
页码:
504-510
栏目:
山地信息技术
出版日期:
2016-08-01

文章信息/Info

Title:
Loess Shoulder-line Constrained Method for Waterworn Gullies Extraction on Loess Plateau
文章编号:
1008-2786-(2016)4-504-07
作者:
杨 锋1; 周 毅1; 陈 旻2
1.陕西师范大学旅游与环境学院,陕西 西安 710119;
2.香港中文大学太空与地球信息科学研究所,香港 沙田 649490
Author(s):
YANG Feng1; ZHOU Yi1; CHEN Min2
1.Shaanxi Normal University College of Tourism and Environment, Xi'an 710062, China;
2.The Chinese University of Hongkong Institute of Space and Earth Information Science, Hongkong 649490, China
关键词:
DEM;  沟沿线;  黄土沟谷
Keywords:
DEM;  shoulder-line;  the loess gully
分类号:
P931.1
DOI:
10.16089/j.cnki.1008-2786.000156
文献标志码:
A
摘要:
黄土沟谷是黄土地貌发育演化研究的重要切入点,可分为继承性与水蚀性两种类型。其中,水蚀性沟谷是构建区域性地表过程模型的重要参数。然而,利用现有的基于数字高程模型(DEM)水文分析方法,无法准确识别水蚀性沟谷。基于黄土坡面流线转折特征,系统性提出一套利用沟沿线约束的黄土水蚀性沟谷识别方法。在宁夏回族自治区固原市刘家沟流域实验结果表明:该方法可准确区分两种类型沟谷; 提取的水蚀性沟谷在偏移距离与沟谷密度指标方面,与目视解译结果对比,精度分别为84.01%,96.98%。
Abstract:
Water erosion is one of the key momentums of shaping the external appearance of modern loess landform. Studies on waterworn gullies are not only significant in loess digital terrain analysis but also useful for recognizing evolution laws of loess landform. As a result, accurately identifying and extraction of waterworn gullies have always been the vital basic and critical part in quantitative research on the Loess Plateau.However, a majority of loess gullies are usually combinations of inherited gullies and waterworn gullies on southern Ningxia, eastern Gansu and western Shaanxi Loess Plateau, which makes great difficulty in distinguishing the waterworn gullies by using of hydrological analysis modules. Severe deviation would be caused in research of calculating core topographic indices(gully density)if we cannot make a distinction between the two types of gullies. To improve the accuracy of waterworn gullies extraction by using of hydrological analysis modules, this paper proposed an extraction method under constraint of loess shoulder-line. We select the Liujiagou watershed as test site because it belongs to hilly Loess Plateau region of China, and there are vast combinations of inherited gullies and waterworn gullies. Our original test data are 5 m-resolution DEM and match QuickBird images with 0.61 m-resolution. The DEM was derived in 2006 and it meets the national standards of China; ortho-rectification of QuickBird image was conducted by using of 5 m-resolution DEM.

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备注/Memo

备注/Memo:
收稿日期(Received date):2015-09-14; 改回日期(Accepted):2015-11-03。
基金项目(Foundation item):国家自然科学青年基金项目(编号:41201464)、国家自然科学基金面上项目(编号:41171299、41371424)。[The National Natural Science Foundation of China(NO. 41201464, NO. 41171299 and NO. 41371424).]
作者简介(Biography):杨锋(1991-),男,陕西商洛人,硕士研究生,研究方向为数字地形分析。[Yang Feng(1991-), male, mainly engaged in the study of digital terrain analysis.] E-mail:yangfeng@snnu.edu.cn
*通信作者(Corresponding author):周毅(1984-),副教授,博士,研究方向为GIS空间分析。[Zhou Yi,(1984-), male, associate professor, mainly engaged in research of GIS spatial analysis.] E-mail:zhouyilucky@snnu.edu.cn
更新日期/Last Update: 2016-07-30