河道地形 meaning in English
fluvial geomorphology
Examples
- As one of the three main parts of the dujiangyan irrigation system , it controls the water that flows into the baopingkou water inlet and discharges flood and sand with its top graphical feature
巧妙利用河道地形的泄洪排沙工程，为控制内江进水量的关键所在，是都江堰渠首工程三大主体之一。 - The first part mainly introduces the gis concept and contents of gis , the comparison between the related software and gis , the present condition and development trend of gis etc , then introduced how to use the gis technique in a specific way such as using the method of " the half - automatic to follow " to turn the map into arithmetic figure , using the method of " the automatic calculates " gets the length of the line and area of field etc , at last got the length and width of every cross section of the fabiela river which is located downstream of xiangshan mountain . this method is superior and time - saving comparing with collecting data on the spot , having important and actual application worth
第一部分主要介绍了gis的概念和研究内容， gis与相关软件的比较以及gis的现状、发展趋势、当前gis研究的热点等等，然后具体介绍了用gis的相关技术如：用“半自动跟踪”方法对地图进行数字化，用“自动量算”方法得到线对象的长度、面对象的面积等，最终完成了象山水库下游法别拉河河道地形数据资料的提取工作，这种方法与人工实地采集工作相比，有较强的优越性和重要的实际应用价值。