CAJ | 학술논문

在流域地貌特征提取中采用AGREE算法的关键技术，将水系形态特征融入数字高程模型形成水文数字高程模型。通过分析不同集水阈值(0.2km2、1km2、2km2、3km2、4km2、5km2)、不同比例尺(万分之一、5万分之一、25万分之一)、不同流域面积标准(0.2km2、1km2、2km2、3km2、4km2、5km2)下流域地貌参数，得出地貌参数的稳定性与河流分级有关，当河流级别达到5级时，参数不随比例尺、集水阈值、面积标准变化而变化。在缺资料地区洪水预报中，只要具备一定精度的地形数据及相应水系，即可满足流域地貌参数的获取。地貌瞬时单位线法相对较稳定，适用于无资料地区中小流域洪水预报。
재류역지모특정제취중채용AGREE산법적관건기술，장수계형태특정융입수자고정모형형성수문수자고정모형。통과분석불동집수역치(0.2km2、1km2、2km2、3km2、4km2、5km2)、불동비례척(만분지일、5만분지일、25만분지일)、불동류역면적표준(0.2km2、1km2、2km2、3km2、4km2、5km2)하류역지모삼수，득출지모삼수적은정성여하류분급유관，당하류급별체도5급시，삼수불수비례척、집수역치、면적표준변화이변화。재결자료지구홍수예보중，지요구비일정정도적지형수거급상응수계，즉가만족류역지모삼수적획취。지모순시단위선법상대교은정，괄용우무자료지구중소류역홍수예보。
In this paper, AGREE algorithm was applied to extract the geomorphic features. The system adjusts the surface elevation of the DEM to be consistent with a stream , which is formed hydrological digital elevation models integrate digital elevation models. Analysis was on the topography parameters derived from different catchment threshold (0.2km2, 1km2, 2km2, 3km2, 4km2, 5km2), different scales (1:10000, 1:50000, 1:250000), and different areas of the standard basin (0.2km2, 1km2, 2km2, 3km2, 4km2, 5km2). The result shows that the topography parameters do not change with catchment threshold , scales and area of the standard if the river orders is 5.