In coastal systems occupied by large clusters of pond aquaculture farms, hydro-sedimentary processes may be impacted by the combination of water management strategies that are individually performed by each cultivation unit. In this study, a numerical model was used to evaluate 100-year morphological alterations in two different idealized coastal lagoons surrounded by shrimp ponds. One is broadly based on the Guaraíras Lagoon System (RN, Brazil) where shrimp farming has developed since 1924, and the other is highly simplified to systematically investigate pond aquaculture impacts. Information obtained through numerical simulations (e.g., hypsometry changes, evolution of morphological parameters, balance of sediment volumes, bed level changes, and residual bed shear stress variations) provided coastal impact assessments for a wide variety of aquaculture occupation scenarios. Key findings include (i) water exchange operations performed by aquaculture farms are capable of modifying the morphological equilibrium state of a coastal lagoon system, especially if carried out synchronously to the local tidal oscillation; (ii) water intake operations regularly performed by pond aquaculture activity increase sediment import to the system; (iii) depth and configuration of tidal channels are modified when pond aquaculture is present. The modeling approach and analyses presented here can be extended to other systems that are under the influence of shrimp farming activity and be adopted to support novel regulations for the conservation of coastal habitats and to contribute to the sustainable development of pond aquaculture in the coastal zone.

在被大量池塘水产养殖场占据的沿海系统中，水沉降过程可能会受到每个养殖单位分别执行的水管理策略的组合的影响。在这项研究中，使用一个数值模型来评估两个被虾池包围的不同理想化沿海泻湖的100年形态变化。一种广泛地基于Guaraíras泻湖系统（巴西RN，自1924年开始发展对虾养殖），另一种高度简化以系统地研究池塘水产养殖的影响。通过数值模拟获得的信息（例如，测压法的变化，形态参数的演变，沉积物量的平衡，床位的变化，和残余床剪应力变化）为各种水产养殖职业情景提供了沿海影响评估。主要研究结果包括：（i）由水产养殖场进行的水交换操作能够改变沿海泻湖系统的形态平衡状态，尤其是与当地潮汐振荡同步进行时；（ii）通过池塘水产养殖活动定期进行的取水操作增加了沉积物向系统的进口；（iii）当有池塘水产养殖时，潮汐通道的深度和结构会发生变化。