Semarang city is the capital of Central Java province, which is located on the cost. The Semarang coastal topography is flat, with slope percentage around 0-2%. Most area is almost the same as height as the sea level and in some places are lower. Environmetal problems faced by Semarang related to this topography area tidal inundation, land subsidence and flooding during rainy season. The research was conducted to model locations that area vulnerable to tide inundation. The data of spot height, countour line and the rate of subsidence were analyzed by using Geographic Information System (GIS). The results showed that the Semarang coastal had a high level of vulnerability to inundated area. Tidal flood inundation area was about 2,400 ha with depths varying from 1 to 66 cm. Mitigation of tide inundation impact must be adjusted to land use and social condition of the local community. The house on stilts or lightweight houses that are easy to dismantle pairs is one of the solutions that is suitable for fisherman residential areas. Whereas the trade and service areas must be carried out by raising of the building floor and making protective buildings from sea water.

三宝垄市是中爪哇省的首府，位于成本上。三宝垄海岸地形平坦，坡度百分比约为 0-2%。大部分地区几乎与海平面高度相同，有些地方更低。三宝垄面临的环境问题与该地形区潮汐淹没、地面沉降和雨季洪水泛滥有关。该研究旨在模拟易受潮汐淹没的地区。采用地理信息系统（GIS）对点高、计数线和沉降率数据进行分析。结果表明，三宝垄沿海地区对淹没区的脆弱性很高。潮汐洪水淹没面积约为 2,400 公顷，深度从 1 厘米到 66 厘米不等。减轻潮汐淹没影响必须根据当地社区的土地利用和社会条件进行调整。高跷房屋或易于成对拆除的轻型房屋是适用于渔民住宅区的解决方案之一。而贸易和服务区必须通过抬高建筑物地板和用海水建造保护性建筑物来进行。