Bank gully extraction from DEMs utilizing the geomorphologic features of a loess hilly area in China

Xin YANG; Jiaming NA; Guoan TANG; Tingting WANG; Axing ZHU

首页> 中文期刊> 《地球科学前沿：英文版》 >Bank gully extraction from DEMs utilizing the geomorphologic features of a loess hilly area in China

Bank gully extraction from DEMs utilizing the geomorphologic features of a loess hilly area in China

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

As one of most active gully types in the Chinese Loess Plateau,bank gullies generally indicate soil loss and land degradation.This study addressed the lack of detailed,large scale monitoring of bank gullies and proposed a semi-automatic method for extracting bank gullies,given typical topographic features based on 5 m resolution DEMs.First,channel networks,including bank gullies,are extracted through an iterative channel bum-in algorithm.Second,gully heads are correctly positioned based on the spatial relationship between gully heads and their corresponding gully shoulder lines.Third,bank gullies are distinguished from other gullies using the newly proposed topographic measurement of "relative gully depth (RGD)."The experimental results from the loess hilly area of the Linjiajian watershed in the Chinese Loess Plateau show that the producer accuracy reaches 87.5%. The accuracy is affected by the DEM resolution and RGD parameters,as well as the accuracy of the gully shoulder line.The application in the Madigou watershed with a high DEM resolution validated the duplicability of this method in other areas.The overall performance shows that bank gullies can be extracted with acceptable accuracy over a large area,which provides essential information for research on soil erosion,geomorphology,and environmental ecology.

著录项

来源
《地球科学前沿：英文版》 |2019年第1期|P.151-168|共18页
作者
Xin YANG; Jiaming NA; Guoan TANG; Tingting WANG; Axing ZHU;
展开▼
作者单位

[1]Key Laboratory of Virtual Geographic Environment (Nanjing Normal University);

Ministry of Education;

Nanjing 210023;

China;

[1]Key Laboratory of Virtual Geographic Environment (Nanjing Normal University);

Ministry of Education;

Nanjing 210023;

China;

[1]Key Laboratory of Virtual Geographic Environment (Nanjing Normal University);

Ministry of Education;

Nanjing 210023;

China;

[2]State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province);

Nanjing 210023;

China;

[3]Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application;

Nanjing 210023;

China;

[4]Department of Geography;

University of Wisconsin-Madison;

Madison;

WI 53706;

USA;

展开▼
原文格式 PDF
正文语种 CHI
中图分类天文学、地球科学;
关键词
bank gully; DEMs; topographic features; loess shoulder line; relative gully depth;

机译：河岸沟;DEMs;地形特征;黄土肩线;相对沟深;

Bank gully extraction from DEMs utilizing the geomorphologic features of a loess hilly area in China

摘要

著录项

相关主题

期刊订阅