coastal engineering and management

In this study will be an assessment of the process of sedimentation that result from the interaction of waves, coastal currents, wind, contour Losari beach in Makassar South Sulawesi Province method approach Surface Water Modeling System (SMS ver. 8.0) and the overlay satellite image landsat 7-ETM year 1996 and 2002on Geogrhapic Information System (SIG). Suspended sediment spreding and seabed sediment change analysed by SMS 8.0.The first stage of the analysis had been done by set a limit on the boundary/training area are: longitude coordinates: 1190 21’ – 1190 25’ East and Latitude: 50 7’ – 50 13’ South. The boundary undergoes some adjustment at the both methods that used in this research. Suspended sediment samples taking began from around the delta until the JeneberangRiver (LS1 to LS7). The sediment measuring result was compared by suspended sediment from running result of module SMS (SED2-WES) and overlay analysis result of the image Landsat 7-ETM (1996 and 2002).The supreme current velocity had happened at the LS1(0.079 m/s)and LS2(0.001 m/s). Beside of those,LS4 and LS6 was between 0.00 - 0.03 m/s and thenLS3, LS5 and LS7 was between 0.00 – 0.019 m/s. The suspended sediment concentrationat each site observation had been increase with difference fluctuation according to the tides data. The sediment concentration accumulation until the end of the time step (72) at station LS1 = 8.63 ppm, LS2 = 6.34 ppm, LS3 = 3.28 ppm, LS4 = 3.79 ppm, LS5 = 1.69 ppm, LS6 = 0.94 ppm and LS7 = 0.60 ppm.Moreover the sediment classification resulted measurement result at each class could be getting in: LS1=14.30; LS2=17.00; LS3=3.65; LS4=11.42; LS5=9.12; LS6=5.54 and LS7=6.32. Whereas the result of analysis on landsat image overlay divided up into five classes for image year 1996 (class 1= 0, class 2= 0 – 4.74 ppm; class 3= 4.74-11.85 ppm; class 4= 11.85-12.91; class 5= 12.91-15.35; class 6= 15.35-22.46) and year 2002 (class 1= 0, class 2= 0 – 13.65 ppm; class 3= 13.65-13.98 ppm; class 4= 13.98-14.73; class 5= 14.73-15.59; and class 6= 15.59-18.84 ppm).本研究针对南苏拉威西省望加锡市洛萨里（Losari）海滩受波浪、沿岸流与风力相互作用引发的沉积过程展开评估，研究采用地表水建模系统（Surface Water Modeling System，SMS ver.8.0）方法，并结合地理信息系统（Geographic Information System，SIG），对1996年与2002年的Landsat 7-ETM卫星影像进行叠加分析。利用SMS 8.0模型开展悬浮泥沙扩散与海底沉积物变化的分析工作。本研究第一阶段的分析先划定研究边界/训练区范围：东经119°21′–119°25′，南纬5°07′–5°13′。本研究所用的两种分析方法对应的研究边界均进行了适当调整。悬浮泥沙采样工作从三角洲附近延伸至杰讷伯朗河（Jeneberang River），共设置LS1至LS7共7个采样点位。将现场实测的泥沙测量结果与SMS模型SED2-WES模块的模拟悬浮泥沙结果，以及Landsat 7-ETM影像（1996年、2002年）的叠加分析结果进行对比。最大流速出现在LS1（0.079 m/s）与LS2（0.001 m/s）点位；其余点位中，LS4与LS6的流速介于0.00–0.03 m/s，LS3、LS5与LS7的流速介于0.00–0.019 m/s。各观测点位的悬浮泥沙浓度随潮汐数据呈现波动变化并整体上升，在模拟时长步长（72）结束时，各站点的泥沙浓度累积值分别为：LS1=8.63 ppm、LS2=6.34 ppm、LS3=3.28 ppm、LS4=3.79 ppm、LS5=1.69 ppm、LS6=0.94 ppm、LS7=0.60 ppm。此外，各点位的沉积物分类测量结果如下：LS1=14.30、LS2=17.00、LS3=3.65、LS4=11.42、LS5=9.12、LS6=5.54、LS7=6.32。针对Landsat影像的叠加分析结果显示，1996年影像分为6个浓度类别：类别1=0，类别2=0–4.74 ppm，类别3=4.74–11.85 ppm，类别4=11.85–12.91 ppm，类别5=12.91–15.35 ppm，类别6=15.35–22.46 ppm；2002年影像同样分为6个浓度类别：类别1=0，类别2=0–13.65 ppm，类别3=13.65–13.98 ppm，类别4=13.98–14.73 ppm，类别5=14.73–15.59 ppm，类别6=15.59–18.84 ppm。