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《Chinese Agricultural Science Bulletin》 2017-23
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Comparison of the Determination of Optimal Convergence Threshold Based on Mean Change-point and Bifurcation Ratio

Liang Beiyu;Xu Yali;Bai Leichao;Luo Mingliang;Zhao Wenqi;Land and Resource School, China West Normal University;  
Digital Elevation Model provides more diversified techniques for the hydrological analysis. Theauthors made use of mean change-point and bifurcation ratio to synthetically analyze hydrologicalcharacteristics and geomorphic features in different areas, meanwhile, compared the difference of river networkextraction through the optimal threshold and the characteristics of bifurcation ratio based on ASTER GDEM.The results indicated that the optimal convergence threshold of Qingxi river area and Xingzi river area was1500 and 1300, respectively, the drainage density was 0.63 and 0.68, respectively; the ability of branch of riverthrough the identical convergence threshold in different basin was the same or similar, but the number of thechannel had great difference. The combination of the two factors may provide a theoretical basis for the futureresearch.
【Fund】: 国家自然科学基金项目“基于DEM的黄土高原流域侵蚀基准体系研究”(41101348);; 西华师范大学基本科研业务费专项资金资助项目“黄土地貌鞍部下切效应研究”(15C002);; 绵阳师范学院四川省生态安全与保护重点实验室“干热河谷生态退化区冲沟侵蚀模拟的不确定性研究”(ESP1606)
【CateGory Index】: P333
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1 FENG Yuan;ZHAO Mudan;ZHANG Peng;WU Yuxin;College of Urban and Environmental Science,Northwest University;;Study on Topographic Features of the Terraces DEM[J];水土保持研究;2017-04
2 Liang Beiyu;Xu Yali;Bai Leichao;Luo Mingliang;Zhao Wenqi;Land and Resource School, China West Normal University;;Comparison of the Determination of Optimal Convergence Threshold Based on Mean Change-point and Bifurcation Ratio[J];中国农学通报;2017-23
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