CAJ | 학술논문

以SRTM DEM数据和ASTER GDEM作为基本的地形数据,借助Arc Hydro Tools扩展模块,研究基于地表径流漫流模型的数字河网水系提取方法,并对提取结果对比分析.研究显示,通过引入河网密度参数来确定集水面积阈值,提取结果与1:25万地形图各级河网拟合程度较好,可运用于辽河流域山洪灾害风险评估模型的实际运行中.
이SRTM DEM수거화ASTER GDEM작위기본적지형수거,차조Arc Hydro Tools확전모괴,연구기우지표경류만류모형적수자하망수계제취방법,병대제취결과대비분석.연구현시,통과인입하망밀도삼수래학정집수면적역치,제취결과여1:25만지형도각급하망의합정도교호,가운용우료하류역산홍재해풍험평고모형적실제운행중.
In this study, SRTM DEM data and ASTER GDEM data were used as the basic topographic data, and Arc Hydro Tools was utilized for extension module so as to study on extracting digital drainage network of watershed based on surface runoff model, as well as to compare the two extracted results. The result showed that through the introduction of drainage density parameter to determine the river drainage area threshold, the both extracted drainages showed the goodness-of-fit with the factual drainage network on 1:250 000 scale topographic map, and the extracted digital river could be used in practical operation of the risk assessment model of mountain torrents disaster in Liaohe basin.