The bankfull represents the boundary between the processes taking place in the canal and the floodplain. The geometry of the bankfull is highly correlated with the drainage area, making it possible to establish regional bankfull geometry relationships that have wide application in canal restoration, studies of river bed degradation, dimensioning of infrastructure, hydrological modeling, among others. In this study, the regional bankfull geometry relationships were determined for an Andean zone in southern Ecuador, getting coefficients comparable to those reported in literature determined in other mountainous areas of the continent. Correlation coefficients higher than 0.60 were obtained, considered statistically significant. The geomorphological runoff threshold, which represents the effective amount of rainfall needed to produce bankfull discharges, was determined using regional bankfull geometry relationships, geomorphological characteristics of the drainage basins in the study area, and the NRCS unit hydrograph. The geomorphological runoff threshold varies from 0.8 mm to 8.50 mm and is based on the concept of the unit hydrograph; therefore it presents the same application limitations and uncertainties associated with the determination of the characteristics of the basin, the bankfull and the scale of work. Future works are proposed considering more detailed scales, a greater number of observation sites and the inclusion of additional variables of the drainage area such as slope, aspect and precipitation, to improve the estimates.

堤岸代表了运河和洪泛区中发生的过程之间的边界。堤岸的几何形状与流域面积高度相关，这使得建立区域堤岸几何关系成为可能，这些关系在运河修复、河床退化研究、基础设施尺寸标注、水文建模等方面具有广泛的应用。在这项研究中，确定了厄瓜多尔南部安第斯地区的区域银行全几何关系，其系数与该大陆其他山区确定的文献中报告的系数相当。获得高于 0.60 的相关系数，认为具有统计学意义。地貌径流阈值，代表产生岸边排放所需的有效降雨量，是使用区域岸边几何关系、研究区流域盆地的地貌特征和 NRCS 单位水文线确定的。地貌径流阈值从 0.8 毫米到 8.50 毫米不等，基于单位水文过程线的概念；因此，它呈现出与确定流域特征、岸边和工作规模相关的相同应用限制和不确定性。未来的工作建议考虑更详细的尺度、更多的观测点和包括流域的其他变量，如坡度、坡向和降水，以改进估计。研究区流域地貌特征及NRCS单元水位线。地貌径流阈值从 0.8 毫米到 8.50 毫米不等，基于单位水文过程线的概念；因此，它呈现出与确定流域特征、岸边和工作规模相关的相同应用限制和不确定性。未来的工作建议考虑更详细的尺度、更多的观测点和包括流域的其他变量，如坡度、坡向和降水，以改进估计。研究区流域地貌特征及NRCS单元水位线。地貌径流阈值从 0.8 毫米到 8.50 毫米不等，基于单位水文过程线的概念；因此，它呈现出与确定流域特征、堤岸和工作规模相关的相同应用限制和不确定性。未来的工作建议考虑更详细的尺度、更多的观测点和包括流域的其他变量，如坡度、坡向和降水，以改进估计。因此，它呈现出与确定流域特征、岸边和工作规模相关的相同应用限制和不确定性。未来的工作建议考虑更详细的尺度、更多的观测点和包括流域的其他变量，如坡度、坡向和降水，以改进估计。因此，它呈现出与确定流域特征、岸边和工作规模相关的相同应用限制和不确定性。未来的工作建议考虑更详细的尺度、更多的观测点和包括流域的其他变量，如坡度、坡向和降水，以改进估计。