Mangkang Kulon Subdistrict is one of the coastal areas in Semarang that has relatively dynamic conditions, which seen from the coastline and mangrove ecosystem changes within several years of observation. This study aims to observe coastline changes and the spatial distribution of mangrove ecosystems on the coast of Mangkang Kulon Subdistrict between 2005, 2012 and 2019. Land use n were obtained from visual interpretation of high-resolution digital globe satellite images from 2005, 2012, and 2019 which then tested the accuracy of land use interpretation through field observation and overlaid one another through vector analysis to find out the changes that have occurred. The study showed that the coastline changes were increasingly jutting towards the land in this range of time. This condition is affected by the port construction on the east coast of the Kendal Regency, which directly adjacent to the Mangkang Kulon Subdistrict. Meanwhile, the mangrove ecosystem has increased widely with relatively elongated and grouped spatial patterns. The increase that occurred as a manifestation of various coastal care activities in the form of mangrove planting activities carried out by several government agencies and private parties with a model of coastal community empowerment.

Mangkang Kulon 街道是三宝垄沿海地区之一，具有相对动态的条件，从海岸线和红树林生态系统的变化可以看出几年的观察。本研究旨在观察 2005 年、2012 年和 2019 年期间芒康库隆街道海岸的海岸线变化和红树林生态系统的空间分布。土地利用 n 是通过对 2005 年、2012 年和 2012 年高分辨率数字地球卫星图像的视觉解释获得的，以及2019年，然后通过实地观察测试土地利用解释的准确性，并通过矢量分析相互叠加，找出发生的变化。研究表明，在这段时间内，海岸线的变化越来越多地向陆地突出。这种情况受到Kendal Regency东海岸港口建设的影响，该地区直接毗邻Mangkang Kulon街道。同时，红树林生态系统范围扩大，空间格局相对拉长、组合。这种增长是由几个政府机构和私人团体以沿海社区赋权模式开展的红树林种植活动形式的各种沿海护理活动的体现。