中国海岸带分布规律及其海部要素变化检测

在海岸带图测绘完成后,海部要素的变化是导致海岸带图使用价值降低的重要因素.根据我国海岸的组成物质将其归纳为淤泥质海岸、沙砾质海岸、基岩海岸、红树海岸和珊瑚海岸,并归纳总结了每一种海岸的空间分布规律.分析了影响海岸线、干出滩以及近海水深等海部要素变化的主要因素,海岸要素变化的因素和变化规律,进而提出了海部要素实质性变化的检测统计方法,对提高海岸带图测绘效率、缩短成图周期、确定更新周期和制定更新方案都具有重要的意义.

The Distributing Rules and the Change Detection of Coast-elements for Chinese Coastland

After the coastal surveying and mapping finished, an important fact that those maps devaluate is the changes of coastal features. According to the composition of the coastal areas by our country, they are divided into four types including silt, gravel, rock or coral, and at the same time, the space-dlstribution rule of each type of coast are summarized. Furthermore, we have analyzed the primary facts that affect the variation of ocean features such as coastlines, dry beaches and water depth. We also have got the influential facts and the rule of coastal features. A method to test the actual variation of ocean features was brought out based on the analysis above. It means great benefits to improve the productivity in surveying and mapping coastal maps, shorten the period of mapping, confirm the period of updating, and make up the scheme.