The coexistence of multiple wave systems generated locally and by remote storms is common in the ocean and its quantification is required in the design of marine facilities. This study identifies the multimodal sea states at six locations in the shelf seas of India based on partitioned wave output data from numerical model WAVEWATCH-III for 26 years (1990 to 2015). The different systems are identified by the propagation direction and frequencies with a relatively high probability of occurrence of spectral partitions. Four to seven types of distinct clusters of wave systems are present among the study locations. The occurrence of these systems and co-occurrence of this with other systems are examined. The southernmost location experiences the effect of seven wave systems. At all locations, two wave systems from the south with relatively low partial significant wave height (H_s) are present for more than 71% of the time and co-occurred with other systems during 2–67%. The most energetic systems are observed 23% (system 5 at station 3) to 60% (system 4 at station 4) of the time with maximum mean partial H_s values of 1 to 3 m during summer monsoon months. The southernmost location (3) experienced maximum opposing (18%) and crossing (78%) sea states.

在海洋中，本地和由远程风暴产生的多波系统并存是常见的，在海洋设施的设计中需要对其进行量化。这项研究基于来自WAVEWATCH-III数值模型的26年（1990年至2015年）的分区波输出数据，确定了印度架子海中六个位置的多峰海况。通过传播方向和频率来识别不同系统，并且出现频谱分区的可能性相对较高。研究位置之间存在四至七种类型的独特的波浪系统簇。检查了这些系统的发生以及与其他系统的共存。最南端的位置受到七个波浪系统的影响。在所有地点_s）的存在时间超过71％，并在2–67％的时间内与其他系统同时发生。在夏季风季，观测到能量最高的系统的时间为23％（站3的系统5）至60％（站4的系统4），最大平均局部H _s值为1-3 m。最南端的位置（3）经历了最大的对立状态（18％）和交叉状态（78％）。