GIS技术在长江扬中河段护岸抛石效果分析中的应用

在长江扬中河段护岸抛石管理工作中，通常采用Hypack提取断面对抛石效果进行检测，但因受概率性事件影响，该方法的统计结果并不唯一，易产生纠纷。针对该方法的缺陷，结合现场施工数据和实际需要，提出采用GIS（地理信息系统）技术对抛石效果进行分析的方法。通过对比Hypack和GIS技术的分析结果，论证GIS技术在反映真实地形及在计算施工区沉降量、流失量、补拋量及展示三维效果等方面的优势,为优化施工工艺、弥补施工缺陷、降低施工成本提供技术支持。

Application of GIS in analyzing effect of riprap revetment in Yangzhong part of the Yangtze River

In the management of the Yangtze River (Yangzhong part) riprap revetment,the effect of riprap revetment is detected by extracting profile lines through Hypack,but the statistical result of this method is affected by the probability,which is not unique,and will lead to disputes.For the drawbacks of Hypack,combing the construction data and actual demand,GIS (Geographic Information System) is put forward to analyze the effect of riprapping.Comparing the analysis results of Hypack and GIS,we demonstrate the superiority of GIS in reflecting the real terrain,calculating the settlement,loss and supplement amount,and showing the 3D effects,which provides a technical support for improving the construction technology,making up for the construction failure,and reducing the construction cost.