三江平原建三江地下水激发补给初步分析

Preliminary studies on underground water resources stimulated supplement in Jiansanjiang Region of Sanjiang Plain

三江平原建三江地区有巨厚的地下水含水层。地表大部分覆盖着平均约１０ ｍ厚的亚粘土，且地势平缓。形成本地区垂 直补给困难，侧向补给缓慢，但是具有优越激发补给的自然杜会条件，开采降深１５ｍ，每年可获得大量的激发补给（江河为 主），占开采资源量的８０％。

The Jiansangjiang Region of Sanjiang Plain owns huge and thick containing underground water layer. Although most of the earth surface, on an average, holds about 10 meters thickness sub-clay layer, and the topography is gentle, which makes it difficult for this region undergroud water to compensate vertically and slow for it to do from side, this region owns favorable natural conditions, when the underground water drops 15 meters depth, which can attain an average several billions cubic meters water resources compensation by stimulated rivers year after year, the stimulated compensation occupies 80% of the extracted undergroud water resources.