river survey map 中文意思是什麼
river survey map
解釋
河道測量圖-
However, people studied the riverway mainly by field survey and landform map contrast before. because of the limits of man ' s field view and complexity of field survey route, it is a difficult bottle neck for people to make synthetical analysis on geological structure, yangtze river shoal, floodplain, terrace, and microcosmic suspended load on macroscopical scale
而以往的河道研究大多數是通過地面調查和地形圖室內對比分析來研究的(少數運用航片) ,由於受人的視域范圍及調查工作路線的布置的復雜度影響,對區域宏觀尺度下的地質構造、長江沙洲、漫灘、階地及河流微觀領域的懸浮物等作綜合性的研究便成為了瓶頸。
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