constructive basin的意思|示意

The historic and cultural cities in Xiangjiang river basin have problems of constructive breakage and place characteristic vanishing, and this problems have deep reasons.

湘江流域历史文化名城目前存在着建设性破坏、场所特性消失等问题，这些问题有着深层次的原因。

The supply of source was comparatively abundant, the water body of lake basin had some rebuilding effect to the sediment which brought by the river, the delta is commonly constructive.

物源供应较丰富，湖盆水体对河流带来的沉积物也有一定改造作用，属一般建设型三角洲。