Hypoxia is often thought of as the key factor responsible for fish kill events in coastal areas but fish kill events are too complex to be governed by a single factor. The events are influenced by a combination of chemical, biological and physical processes. Hydrodynamics play a key role in understanding the formation of hypoxia in shallow waters. This study aims to identify the settings of the physical forces that lead to a large-scale depletion of dissolved oxygen in Kuwait Bay at the northwest of the Arabian Gulf. The assessment, made with a validated three-dimensional numerical model (Alosairi and Alsulaiman, 2019), revealed that the pollution from the outfalls leads to nearfield depletion of dissolved oxygen but has only a minor effect on the bay-scale dissolved oxygen. This is a result of the strong dynamics of Kuwait Bay, which mixes the pollutant rapidly before it is transported seawards. Offshore, a low dynamic region has been identified near Jahra Bay which is susceptible to occasional dissolved oxygen depletion. Assessment of the physical forces revealed that the density-driven current and, to a greater extent the wind regime, controlled the formation of a hypoxic parcel near Jahra Bay. The combination of neap tides and low mixed winds reduced mixing and enabled the longer residence times of Kuwait Bay. These are the most critical circumstances, as the average dissolved oxygen can be reduced by 50% during summer. The circumstance resulting in low dynamics near Jahra Bay were also found to be effective in explaining algal blooms.

低氧通常被认为是造成沿海地区鱼类致死事件的关键因素，但鱼类致死事件过于复杂，无法由一个因素来控制。这些事件受化学，生物和物理过程的综合影响。流体力学在理解浅水缺氧的形成中起关键作用。这项研究旨在确定导致阿拉伯海湾西北部科威特湾大规模溶解氧消耗的物理力设置。该评估是通过经过验证的三维数值模型进行的（Alosairi和Alsulaiman，2019），结果表明，排污口的污染导致溶解氧的近场消耗，但对海湾规模的溶解氧影响不大。这是科威特湾动力强劲的结果，在将污染物排入海域之前会迅速混合。在海上，在贾赫拉湾附近发现了一个低动态区域，该区域偶尔会溶解氧耗竭。对物理力的评估表明，由密度驱动的电流以及更大范围内的风势控制了贾哈拉湾附近低氧包裹的形成。潮汐和低混合风的结合减少了混合，使科威特湾的停留时间更长。这些是最关键的情况，因为在夏天，平均溶解氧可以减少50％。在贾赫拉湾附近导致低动态的情况也被发现可以有效地解释藻华。在贾赫拉湾附近发现了一个低动态区域，该区域容易发生溶解氧的消耗。对物理力的评估表明，由密度驱动的电流以及更大范围内的风势控制了贾哈拉湾附近低氧包裹的形成。潮汐和低混合风的结合减少了混合，使科威特湾的停留时间更长。这些是最关键的情况，因为夏季平均溶解氧可以减少50％。在贾赫拉湾附近导致低动态的情况也被发现可以有效地解释藻华。在贾赫拉湾附近发现了一个低动态区域，该区域容易发生溶解氧耗竭。对物理力的评估表明，由密度驱动的电流以及更大范围内的风势控制了贾哈拉湾附近低氧包裹的形成。潮汐和低混合风的结合减少了混合，使科威特湾的停留时间更长。这些是最关键的情况，因为夏季平均溶解氧可以减少50％。在贾赫拉湾附近导致低动态的情况也被发现可以有效地解释藻华。控制了Jahra湾附近低氧包裹的形成。潮汐和低混合风的结合减少了混合，使科威特湾的停留时间更长。这些是最关键的情况，因为夏季平均溶解氧可以减少50％。在贾赫拉湾附近导致低动态的情况也被发现可以有效地解释藻华。控制了Jahra湾附近低氧包裹的形成。潮汐和低混合风的结合减少了混合，使科威特湾的停留时间更长。这些是最关键的情况，因为夏季平均溶解氧可以减少50％。在贾赫拉湾附近导致低动态的情况也被发现可以有效地解释藻华。