topographical GMAT

Topographical maps not only show planimetric position but also indicate relief by some method.

地形图不仅表示出平面位置，而且还通过某种方法显示地貌。

We propose that As anomalism in groundwater possibly resulted from the combined effects of organic matter-enriched lacustrine sediments, geological setting and topographical characteristics.

通过研究，可以看出以还原环境富含有机质湖沼相沉积环境、特定地质、地形条件地下水砷异常原因。