Base of aquifer contours enhanced with airborne electromagnetic (AEM) surveys of the principal aquifer for portions of the North Platte, South Platte, and Twin Platte Natural Resources Districts, western Nebraska

The U.S. Geological Survey and its partners have collaborated to complete airborne geophysical surveys for areas of the North and South Platte River valleys and...美国地质调查局（U.S. Geological Survey）及其合作伙伴已合作完成北普拉特河谷与南普拉特河谷区域的航空地球物理测量工作，并……