松花江沿岸裸露水准点沉降试验

The Uncovered Benchmark Settlement Test along the Bank of the Songhuajing River

通过水准点的沉降试验，得出在松花江沿岸非饱和水分冲积砂土壤中，埋石点的高程变化不会影响航道测量及水文测量的精度。

The conclusion for the settlement experiment of benchmarks in this thesis, is that the height changes of buried-points laid in insaturate-moistured and deposited sandy soil nearby the Song. River cannot affect the precision for river survey and hydrologic survey.