WebINTRODUCTION. The Silurian-Devonian aquifer is present in Iowa, Wisconsin, and Michigan ( fig. 73 ). The aquifer consists mostly of limestone and dolomite in all three States, but locally contains interbedded shale and evaporite beds. The Silurian-Devonian aquifer underlies all but the northern part of Iowa, or about 90 percent of the State ... WebThe investigation found water levels in the Cambrian-Ordovician aquifer have declined over much of Iowa from the 1975 baseline map based on results from the computer simulation model. Although no current violations of the 200-foot limit were found, the model predicts violations within 20 years with only small water use increases.

USGS Groundwater for Iowa: Water Levels

WebCentral Water Works - Mississippian. Chain Ridge Subdivision - Silurian. Charles City - Devonian. Charles City Golf Course - Devonian. Charlotte - Cambrian-Ordovician. … WebAquifers. Water for drinking, agriculture, and industry in Iowa largely comes from various aquifers within the state. The aquifer mapping application allows users to click any location in Iowa and view the bedrock aquifers … bitwarden import from firefox

USGS 321739106465901 23S.02E.19.133

http://publications.iowa.gov/26584/1/WRI-2A.pdf WebHydrogeology research at IGS is focused on evaluating groundwater conditions in shallow and deep aquifers across Iowa and bridging the intersection of groundwater quantity … WebThe IGS has developed groundwater flow models using Visual MODFLOW and MODFLOW Flex for Iowa’s regional confined aquifers, as well as numerous alluvial aquifers across Iowa. Numerical models can predict future impacts and overall water-level declines caused by increased water use. bitwarden import from safari