Muddy, upslope-migrating sediment waves, with their crestal lines parallel to the bathymetric contours, are the dominant geomorphic elements in the entire lower slope along the Indian north-eastern continental margin. Wave dimensions are maximum with high but differing degrees of sediment accretions on the upslope and downslope sides of wave crests and with most upslope wave migrations in the northeastern part of the study area, having relatively low seafloor gradients. The wave dimensions decrease with lower as well as differing degrees of sediment accretions on both sides of wave crests and with lower upslope wave migrations in the southwestern parts of the study area, having steeper seafloor gradients. Within each area of the lower slope, starting from updip, wave dimensions increase to their maximum at some distance downdip with optimal low seafloor gradients. Farther downdip, the wave dimensions decrease even with lower seafloor gradients continuing. Also, within each area, at the base of the wave intervals, the waves are small and grow into larger features with more sediment accretions in the upper intervals.

The distribution and characteristics of sediment waves observed along the Indian margin are indicative of deposition by down-slope moving, unconfined turbidity currents that have evolved from other sediment gravity flows derived from several point sources updip. Along-slope bottom currents are least likely agents of wave deposition here. We interpret that the spatial and temporal variations in wave dimensions are due to the variations in seafloor gradients, turbidity current flow characteristics, frequency, duration and total number of flow events in space and time.

泥质、上坡迁移的沉积波，其波峰线平行于等深线，是印度东北部大陆边缘整个下坡的主要地貌要素。波浪尺寸最大，在波峰的上坡和下坡两侧沉积物增加但程度不同，并且研究区东北部的上坡波浪迁移最多，海底梯度相对较低。波浪尺寸随着波峰两侧沉积物沉积量的减少和不同程度的降低以及研究区西南部海床坡度较陡的上坡波浪迁移降低而减小。在下坡的每个区域内，从上倾开始，波浪尺寸在一定距离下倾时增加到最大值，并具有最佳的低海底梯度。进一步下倾，即使海底梯度继续降低，波浪尺寸也会减小。此外，在每个区域内，在波浪间隔的底部，波浪很小并成长为更大的特征，在上部间隔中沉积物增多。

沿印度边缘观察到的沉积波的分布和特征表明，由下坡移动的、不受限制的浊流沉积，这些流是从几个点源上倾的其他沉积物重力流演变而来的。沿坡底流是这里波浪沉积的最不可能的因素。我们解释说，波浪维度的空间和时间变化是由于海底梯度、浊流流动特性、频率、持续时间和空间和时间流动事件总数的变化。