Convergent tectonics and glaciomarine sedimentary processes in the northern Gulf of Alaska have produced a variety of troughs, canyons, channels, gullies, and other drainage related features over a range of spatial scales. To evaluate the effects of glaciomarine and fault processes on observed drainage morphology we measured regional drainage feature cross-profile shape characteristics across the area. Our results show overlap between U-shaped feature cross-profile locations, ice sheet extents, and instability zones on the shallow shelf and slope that were previously inferred by observations of potential mass-movement structures such as slumps, slides, and debris flows. U-shaped profiles were also observed in areas of recent slope progradation such as the flank of the proximal deep-sea Surveyor Fan. We used principal component analysis (PCA) and geographically weighted regression (GWR) to relate drainage cross-profile morphology to proxy variables for ice sheets, faults, and instability zones. This method enables quantitative evaluation of the effects on cross-profile shape explainable by each variable as indicated by the magnitude, distribution, and variation of parameter coefficients both at the local and regional scale. Our multiple variable GWR model can explain most of the regional variability in cross-profile shape with the contribution of each parameter varying throughout the study area. Parameters associated with ice sheet extent have the strongest overall relationship with drainage shape, while the distance from an instability zone is the strongest local relationship. The fault proxy parameter shows relatively strong correlations with cross-profile shape near the Transition Fault, and the narrowest zone of morphologic influence overall.

阿拉斯加北部海湾的聚合构造和冰川海洋沉积过程在一系列空间尺度上产生了各种低谷，峡谷，河道，沟壑和其他与排水有关的特征。为了评估冰川和断层过程对观测到的排水形态的影响，我们测量了整个地区的区域排水特征交叉剖面形状特征。我们的结果表明，U型特征交叉剖面位置，冰盖范围以及浅层陆架和斜坡上的不稳定性区域之间存在重叠，这些重叠先前是通过观察潜在的质量运动结构（例如坍落度，滑坡和泥石流）来推断的。在最近的坡度恶化区域（例如近海深海测量师范的侧面）也观察到了U形轮廓。我们使用主成分分析（PCA）和地理加权回归（GWR）将排水跨剖面形态与冰盖，断层和不稳定区域的代理变量相关联。这种方法可以定量评估对交叉轮廓形状的影响，这些影响可以通过局部和区域范围内参数系数的大小，分布和变化所表示的每个变量来解释。我们的多变量GWR模型可以解释跨剖面形状中的大部分区域变异性，而每个参数的贡献在整个研究区域中都是变化的。与冰盖范围相关的参数与排水形状的整体关系最强，而距失稳带的距离则是最强的局部关系。