Potentiometric surface, Mississippi River Valley alluvial aquifer, spring 2016, raster format, in feet

A potentiometric surface map for spring 2016 was created for the Mississippi River Valley alluvial (MRVA) aquifer, which was referenced to the North American Vertical...针对密西西比河河谷冲积（MRVA）含水层，已完成2016年春季的测压水面图（potentiometric surface map）编制，该图以北美垂直（North American Vertical）为参照基准。