Abstract：
The complexity of micro-tidal inlets arises from the combined action of littoral drift and tidal range on their stability. Consequently, understanding and evaluating their stability poses a significant challenge. This study aims to shed some insight on the assessment of inlet stability by employing Delft 3D model. The stability of the inlet between the ocean and estuary relies on the balance between the longshore transport rate and the spring tidal prism. Disrupting this equilibrium results in the closure of the inlets. The movement of sediments in the surf zone is primarily driven by longshore velocity, which acts as the driving force for littoral drift, which is estimated using Delft 3D wave model. The longshore transport rate is estimated by employing empirical relationships and numerical codes based on the obtained driving force. Subsequently, the stability of the inlet is assessed based on these estimations. The spring tidal prism refers to the discharge of water flowing into the ocean from inlets and estuaries. Flow velocity is determined using Delft 3D flow model. The input data for nearshore circulation resulting from waves and currents is primarily collected through field measurements and data collected from Indian National Centre for Ocean Information Services (INCOIS). For the current study, Muttukadu (12°47\'13″N, 80°15\'01″E) inlet, Kovalam along the East Coast of the Indian Peninsula is investigated by assessing its seasonal variations. This study contributes to the management of marine biological ecology, the expansion of small-scale artisanal fishing, the promotion of water sports-related tourism, the advancement of fishing harbor development, and the execution of coastal engineering projects.
摘要：
微潮汐进水口的复杂性源于沿岸漂移和潮汐范围对其稳定性的共同作用。因此,理解和评估它们的稳定性构成了重大挑战。本研究旨在通过使用Delft3D模型对进口稳定性的评估提供一些见解。海洋和河口之间进水口的稳定性取决于长岸运输速率和春季潮汐棱镜之间的平衡。破坏这种平衡导致入口的关闭。冲浪区沉积物的运动主要是由长海岸速度驱动的，作为沿海漂移的驱动力，这是使用代尔夫特三维波模型估计的。通过根据获得的驱动力采用经验关系和数字代码来估算长岸运输速率。随后，基于这些估计来评估进气道的稳定性。春季潮汐棱镜是指从进水口和河口流入海洋的水的排放。使用Delft3D流动模型确定流速。波浪和洋流产生的近岸环流的输入数据主要是通过现场测量和从印度国家海洋信息服务中心（INCOIS）收集的数据来收集的。对于目前的研究，Muttukadu(北纬12°47\'13″,80°15\'01″E)进口,通过评估其季节性变化，对印度半岛东海岸的科瓦拉姆进行了调查。这项研究有助于海洋生物生态学的管理，小规模手工捕鱼的扩展，促进水上运动相关旅游，渔港发展的推进，和沿海工程项目的执行。
